/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:20:18,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:20:18,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:20:18,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:20:18,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 19:20:18,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:20:18,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:20:18,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:20:18,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:20:18,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:20:18,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:20:18,800 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:20:18,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:20:18,800 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:20:18,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:20:18,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:20:18,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:20:18,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:20:18,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:20:18,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:20:18,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:20:18,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:20:18,820 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:20:18,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:20:18,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:20:18,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:20:18,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:20:18,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:20:18,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:20:18,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:20:18,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:20:18,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:20:18,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:20:18,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:20:18,823 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:20:18,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:20:18,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:20:19,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:20:19,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:20:19,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:20:19,166 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:20:19,167 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:20:19,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2021-06-12 19:20:19,168 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2021-06-12 19:20:19,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:20:19,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:20:19,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:20:19,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:20:19,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:20:19,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:20:19,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:20:19,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:20:19,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:20:19,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... [2021-06-12 19:20:19,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:20:19,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:20:19,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:20:19,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:20:19,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:20:19,305 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:20:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:20:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:20:19,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:20:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:20:19,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:20:19,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:20:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:20:19,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:20:19,307 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:20:19,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:20:19,589 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 19:20:19,591 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:20:19 BoogieIcfgContainer [2021-06-12 19:20:19,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:20:19,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:20:19,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:20:19,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:20:19,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:20:19" (1/2) ... [2021-06-12 19:20:19,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703c20ed and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:20:19, skipping insertion in model container [2021-06-12 19:20:19,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:20:19" (2/2) ... [2021-06-12 19:20:19,597 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2021-06-12 19:20:19,618 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:20:19,618 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:20:19,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:20:19,619 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:20:19,676 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:20:19,693 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:20:19,710 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:20:19,710 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:20:19,710 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:20:19,710 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:20:19,711 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:20:19,711 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:20:19,711 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:20:19,711 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:20:19,719 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-12 19:20:19,728 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:20:19,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:19,736 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:19,737 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1266515445, now seen corresponding path program 1 times [2021-06-12 19:20:19,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:19,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112595340] [2021-06-12 19:20:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:20,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:20,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112595340] [2021-06-12 19:20:20,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112595340] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:20,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:20,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:20:20,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438089659] [2021-06-12 19:20:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:20,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:20,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:20,085 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:20,154 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2021-06-12 19:20:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:20,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:20:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:20,164 INFO L225 Difference]: With dead ends: 61 [2021-06-12 19:20:20,164 INFO L226 Difference]: Without dead ends: 54 [2021-06-12 19:20:20,166 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-12 19:20:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-06-12 19:20:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-06-12 19:20:20,195 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2021-06-12 19:20:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:20,195 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-06-12 19:20:20,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-06-12 19:20:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:20:20,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:20,196 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:20,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:20:20,197 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash 861572483, now seen corresponding path program 2 times [2021-06-12 19:20:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:20,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101189552] [2021-06-12 19:20:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:20,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:20,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101189552] [2021-06-12 19:20:20,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101189552] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:20,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:20,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:20:20,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032345531] [2021-06-12 19:20:20,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:20,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:20,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:20,272 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:20,321 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2021-06-12 19:20:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:20:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:20,322 INFO L225 Difference]: With dead ends: 52 [2021-06-12 19:20:20,322 INFO L226 Difference]: Without dead ends: 45 [2021-06-12 19:20:20,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-12 19:20:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-06-12 19:20:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2021-06-12 19:20:20,329 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2021-06-12 19:20:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:20,330 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2021-06-12 19:20:20,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2021-06-12 19:20:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:20,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:20,331 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:20,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:20:20,331 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:20,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:20,332 INFO L82 PathProgramCache]: Analyzing trace with hash -580645877, now seen corresponding path program 1 times [2021-06-12 19:20:20,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:20,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547631375] [2021-06-12 19:20:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:20,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547631375] [2021-06-12 19:20:20,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547631375] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:20,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:20,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:20,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676043383] [2021-06-12 19:20:20,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:20,363 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:20,408 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2021-06-12 19:20:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:20,410 INFO L225 Difference]: With dead ends: 63 [2021-06-12 19:20:20,410 INFO L226 Difference]: Without dead ends: 55 [2021-06-12 19:20:20,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-12 19:20:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-06-12 19:20:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-12 19:20:20,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-06-12 19:20:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:20,416 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-12 19:20:20,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-12 19:20:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:20,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:20,417 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:20,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:20:20,417 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1509805029, now seen corresponding path program 1 times [2021-06-12 19:20:20,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:20,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378439341] [2021-06-12 19:20:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:20,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378439341] [2021-06-12 19:20:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378439341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569622496] [2021-06-12 19:20:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:20:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:20,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569622496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:20,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:20,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:20:20,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465889615] [2021-06-12 19:20:20,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:20:20,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:20:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:20:20,624 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:20,671 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-06-12 19:20:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:20,674 INFO L225 Difference]: With dead ends: 59 [2021-06-12 19:20:20,674 INFO L226 Difference]: Without dead ends: 59 [2021-06-12 19:20:20,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-12 19:20:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-06-12 19:20:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-06-12 19:20:20,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-06-12 19:20:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:20,687 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-06-12 19:20:20,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-06-12 19:20:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:20,688 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:20,688 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:20,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:20,913 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash -709388465, now seen corresponding path program 2 times [2021-06-12 19:20:20,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:20,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233071078] [2021-06-12 19:20:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:20,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:20,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233071078] [2021-06-12 19:20:20,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233071078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:20,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:20,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291077205] [2021-06-12 19:20:20,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:20,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:20,965 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,011 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-06-12 19:20:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,014 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:20:21,014 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:20:21,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:20:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2021-06-12 19:20:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-12 19:20:21,018 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2021-06-12 19:20:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,018 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-12 19:20:21,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-12 19:20:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,019 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 19:20:21,019 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,020 INFO L82 PathProgramCache]: Analyzing trace with hash -137933659, now seen corresponding path program 3 times [2021-06-12 19:20:21,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574564877] [2021-06-12 19:20:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574564877] [2021-06-12 19:20:21,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574564877] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:21,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:21,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534464752] [2021-06-12 19:20:21,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:21,046 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,102 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2021-06-12 19:20:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:20:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,104 INFO L225 Difference]: With dead ends: 77 [2021-06-12 19:20:21,104 INFO L226 Difference]: Without dead ends: 74 [2021-06-12 19:20:21,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-12 19:20:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-06-12 19:20:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-12 19:20:21,108 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2021-06-12 19:20:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,108 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-12 19:20:21,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-12 19:20:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,109 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:20:21,110 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2069505205, now seen corresponding path program 2 times [2021-06-12 19:20:21,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920199529] [2021-06-12 19:20:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920199529] [2021-06-12 19:20:21,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920199529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015451001] [2021-06-12 19:20:21,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:21,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:20:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015451001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:21,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:21,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:20:21,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675412677] [2021-06-12 19:20:21,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:20:21,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:20:21,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:21,254 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,288 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-06-12 19:20:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,290 INFO L225 Difference]: With dead ends: 67 [2021-06-12 19:20:21,290 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 19:20:21,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 19:20:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-06-12 19:20:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-06-12 19:20:21,293 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-06-12 19:20:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,294 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-06-12 19:20:21,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-06-12 19:20:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,294 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:21,520 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1760870987, now seen corresponding path program 3 times [2021-06-12 19:20:21,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450125600] [2021-06-12 19:20:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450125600] [2021-06-12 19:20:21,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450125600] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:21,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:21,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:21,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610232030] [2021-06-12 19:20:21,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:21,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:21,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:21,545 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,589 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-12 19:20:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:20:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,591 INFO L225 Difference]: With dead ends: 60 [2021-06-12 19:20:21,591 INFO L226 Difference]: Without dead ends: 58 [2021-06-12 19:20:21,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-12 19:20:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-06-12 19:20:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-06-12 19:20:21,598 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-06-12 19:20:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,598 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-06-12 19:20:21,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-06-12 19:20:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,599 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 19:20:21,600 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1740461429, now seen corresponding path program 4 times [2021-06-12 19:20:21,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402271104] [2021-06-12 19:20:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402271104] [2021-06-12 19:20:21,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402271104] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:21,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:21,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:21,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982869802] [2021-06-12 19:20:21,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:21,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:21,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:21,646 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,698 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2021-06-12 19:20:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,704 INFO L225 Difference]: With dead ends: 63 [2021-06-12 19:20:21,704 INFO L226 Difference]: Without dead ends: 63 [2021-06-12 19:20:21,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-12 19:20:21,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-06-12 19:20:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-12 19:20:21,711 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-06-12 19:20:21,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,711 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-12 19:20:21,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-12 19:20:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,712 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 19:20:21,712 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1478794711, now seen corresponding path program 5 times [2021-06-12 19:20:21,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698495214] [2021-06-12 19:20:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698495214] [2021-06-12 19:20:21,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698495214] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:21,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146608348] [2021-06-12 19:20:21,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:21,748 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,800 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-06-12 19:20:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,802 INFO L225 Difference]: With dead ends: 65 [2021-06-12 19:20:21,802 INFO L226 Difference]: Without dead ends: 65 [2021-06-12 19:20:21,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-12 19:20:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-06-12 19:20:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-12 19:20:21,805 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-06-12 19:20:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,805 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-12 19:20:21,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-12 19:20:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,806 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:20:21,806 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2050249517, now seen corresponding path program 6 times [2021-06-12 19:20:21,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341448610] [2021-06-12 19:20:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341448610] [2021-06-12 19:20:21,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341448610] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:21,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:21,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274633026] [2021-06-12 19:20:21,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:21,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:21,832 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,879 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-06-12 19:20:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:20:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,880 INFO L225 Difference]: With dead ends: 58 [2021-06-12 19:20:21,880 INFO L226 Difference]: Without dead ends: 55 [2021-06-12 19:20:21,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-12 19:20:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-06-12 19:20:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2021-06-12 19:20:21,883 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2021-06-12 19:20:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,883 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2021-06-12 19:20:21,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2021-06-12 19:20:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:21,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,886 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 19:20:21,886 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 118677971, now seen corresponding path program 4 times [2021-06-12 19:20:21,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899942205] [2021-06-12 19:20:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:21,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899942205] [2021-06-12 19:20:21,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899942205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:21,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674127943] [2021-06-12 19:20:21,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:21,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:21,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:20:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674127943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:22,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:22,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:20:22,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61464539] [2021-06-12 19:20:22,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:20:22,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:20:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:20:22,014 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:22,065 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-12 19:20:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:20:22,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:22,066 INFO L225 Difference]: With dead ends: 60 [2021-06-12 19:20:22,066 INFO L226 Difference]: Without dead ends: 60 [2021-06-12 19:20:22,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-12 19:20:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-06-12 19:20:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-06-12 19:20:22,069 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2021-06-12 19:20:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:22,069 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-06-12 19:20:22,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-06-12 19:20:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:22,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:22,070 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:22,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 19:20:22,289 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash -345913133, now seen corresponding path program 5 times [2021-06-12 19:20:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:22,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082237984] [2021-06-12 19:20:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:22,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:22,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082237984] [2021-06-12 19:20:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082237984] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:22,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:22,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:22,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122262537] [2021-06-12 19:20:22,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:22,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:22,328 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:22,390 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2021-06-12 19:20:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:20:22,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:22,392 INFO L225 Difference]: With dead ends: 74 [2021-06-12 19:20:22,392 INFO L226 Difference]: Without dead ends: 72 [2021-06-12 19:20:22,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-12 19:20:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-06-12 19:20:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-12 19:20:22,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-06-12 19:20:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:22,399 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-12 19:20:22,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-12 19:20:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:20:22,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:22,399 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:22,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 19:20:22,400 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash 36807255, now seen corresponding path program 6 times [2021-06-12 19:20:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:22,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535945455] [2021-06-12 19:20:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:22,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:22,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535945455] [2021-06-12 19:20:22,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535945455] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:20:22,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:20:22,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:20:22,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24513822] [2021-06-12 19:20:22,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:20:22,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:22,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:20:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:20:22,445 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:22,483 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-06-12 19:20:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:20:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:22,484 INFO L225 Difference]: With dead ends: 44 [2021-06-12 19:20:22,484 INFO L226 Difference]: Without dead ends: 40 [2021-06-12 19:20:22,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-12 19:20:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-06-12 19:20:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-12 19:20:22,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-06-12 19:20:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:22,488 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-12 19:20:22,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-12 19:20:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:22,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:22,489 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:22,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 19:20:22,489 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 467311611, now seen corresponding path program 1 times [2021-06-12 19:20:22,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:22,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020441931] [2021-06-12 19:20:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:22,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:22,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020441931] [2021-06-12 19:20:22,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020441931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:22,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59131590] [2021-06-12 19:20:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:22,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:22,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59131590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:22,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:22,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:20:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228789754] [2021-06-12 19:20:22,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:20:22,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:20:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:22,766 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:22,838 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2021-06-12 19:20:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:20:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:22,839 INFO L225 Difference]: With dead ends: 61 [2021-06-12 19:20:22,839 INFO L226 Difference]: Without dead ends: 54 [2021-06-12 19:20:22,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-12 19:20:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-06-12 19:20:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2021-06-12 19:20:22,844 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2021-06-12 19:20:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:22,844 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2021-06-12 19:20:22,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2021-06-12 19:20:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:22,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:22,852 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:23,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:23,074 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:23,075 INFO L82 PathProgramCache]: Analyzing trace with hash 338569023, now seen corresponding path program 2 times [2021-06-12 19:20:23,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:23,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466230958] [2021-06-12 19:20:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:23,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:23,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466230958] [2021-06-12 19:20:23,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466230958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:23,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693978969] [2021-06-12 19:20:23,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:23,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:23,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693978969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:23,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:23,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:20:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955516708] [2021-06-12 19:20:23,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:23,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:23,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:23,296 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:23,376 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2021-06-12 19:20:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:20:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:23,377 INFO L225 Difference]: With dead ends: 76 [2021-06-12 19:20:23,377 INFO L226 Difference]: Without dead ends: 69 [2021-06-12 19:20:23,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-12 19:20:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-06-12 19:20:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-12 19:20:23,382 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-12 19:20:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:23,382 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-12 19:20:23,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-12 19:20:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:23,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:23,383 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:23,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 19:20:23,606 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1953271747, now seen corresponding path program 3 times [2021-06-12 19:20:23,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:23,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691793664] [2021-06-12 19:20:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:23,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691793664] [2021-06-12 19:20:23,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691793664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085004930] [2021-06-12 19:20:23,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:23,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:23,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:23,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:23,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:23,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085004930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:23,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:23,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:20:23,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176325701] [2021-06-12 19:20:23,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:23,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:23,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:23,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:23,818 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:23,887 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2021-06-12 19:20:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:20:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:23,887 INFO L225 Difference]: With dead ends: 64 [2021-06-12 19:20:23,887 INFO L226 Difference]: Without dead ends: 57 [2021-06-12 19:20:23,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-12 19:20:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-06-12 19:20:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-12 19:20:23,890 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-12 19:20:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-12 19:20:23,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-12 19:20:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:23,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:23,890 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:24,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:24,105 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash -713510149, now seen corresponding path program 4 times [2021-06-12 19:20:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:24,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63262394] [2021-06-12 19:20:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:24,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:24,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63262394] [2021-06-12 19:20:24,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63262394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:24,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147588119] [2021-06-12 19:20:24,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:24,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:24,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147588119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:24,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:24,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:20:24,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719086786] [2021-06-12 19:20:24,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:24,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:24,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:24,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:24,323 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:24,393 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2021-06-12 19:20:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:20:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:24,394 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:20:24,394 INFO L226 Difference]: Without dead ends: 73 [2021-06-12 19:20:24,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-12 19:20:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-06-12 19:20:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-06-12 19:20:24,396 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2021-06-12 19:20:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:24,396 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-06-12 19:20:24,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-06-12 19:20:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:24,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:24,397 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:24,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:24,613 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 901192575, now seen corresponding path program 5 times [2021-06-12 19:20:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065558410] [2021-06-12 19:20:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:24,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065558410] [2021-06-12 19:20:24,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065558410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314569019] [2021-06-12 19:20:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:24,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:24,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:24,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314569019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:24,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:24,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:20:24,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845284642] [2021-06-12 19:20:24,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:24,825 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:24,892 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2021-06-12 19:20:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:20:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:24,893 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:20:24,893 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 19:20:24,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 19:20:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-12 19:20:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-12 19:20:24,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-12 19:20:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:24,895 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-12 19:20:24,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-12 19:20:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:20:24,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:24,896 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:25,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 19:20:25,109 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1178101253, now seen corresponding path program 6 times [2021-06-12 19:20:25,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:25,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148284501] [2021-06-12 19:20:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:25,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148284501] [2021-06-12 19:20:25,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148284501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753563390] [2021-06-12 19:20:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:25,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:20:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:20:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:25,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753563390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:25,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:20:25,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178833978] [2021-06-12 19:20:25,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:20:25,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:25,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:20:25,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:20:25,284 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:25,359 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-06-12 19:20:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:20:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:25,360 INFO L225 Difference]: With dead ends: 67 [2021-06-12 19:20:25,360 INFO L226 Difference]: Without dead ends: 60 [2021-06-12 19:20:25,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-12 19:20:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-06-12 19:20:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2021-06-12 19:20:25,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2021-06-12 19:20:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:25,362 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2021-06-12 19:20:25,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2021-06-12 19:20:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:25,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:25,363 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:25,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:25,585 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385307, now seen corresponding path program 7 times [2021-06-12 19:20:25,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:25,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191886724] [2021-06-12 19:20:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:25,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:25,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191886724] [2021-06-12 19:20:25,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191886724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788980605] [2021-06-12 19:20:25,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:25,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788980605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:25,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:20:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462795962] [2021-06-12 19:20:25,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:25,718 INFO L87 Difference]: Start difference. First operand 58 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:25,800 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2021-06-12 19:20:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:25,801 INFO L225 Difference]: With dead ends: 84 [2021-06-12 19:20:25,801 INFO L226 Difference]: Without dead ends: 73 [2021-06-12 19:20:25,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-12 19:20:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-06-12 19:20:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2021-06-12 19:20:25,803 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2021-06-12 19:20:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:25,803 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2021-06-12 19:20:25,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2021-06-12 19:20:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:25,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:25,804 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:26,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:26,024 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:26,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1405744629, now seen corresponding path program 8 times [2021-06-12 19:20:26,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:26,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638621270] [2021-06-12 19:20:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:26,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:26,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638621270] [2021-06-12 19:20:26,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638621270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:26,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053613482] [2021-06-12 19:20:26,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:26,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:26,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:26,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053613482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:26,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:26,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:20:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265309010] [2021-06-12 19:20:26,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:26,149 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:26,210 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-06-12 19:20:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:26,212 INFO L225 Difference]: With dead ends: 81 [2021-06-12 19:20:26,212 INFO L226 Difference]: Without dead ends: 81 [2021-06-12 19:20:26,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-12 19:20:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-06-12 19:20:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-06-12 19:20:26,214 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2021-06-12 19:20:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:26,214 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-06-12 19:20:26,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-06-12 19:20:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:26,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:26,215 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:26,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 19:20:26,421 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:26,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1226449649, now seen corresponding path program 9 times [2021-06-12 19:20:26,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:26,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516662284] [2021-06-12 19:20:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:26,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:26,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516662284] [2021-06-12 19:20:26,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516662284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:26,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894873964] [2021-06-12 19:20:26,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:26,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:26,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:26,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:26,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894873964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:26,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:26,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:26,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986026803] [2021-06-12 19:20:26,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:26,553 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:26,673 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2021-06-12 19:20:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:26,674 INFO L225 Difference]: With dead ends: 154 [2021-06-12 19:20:26,674 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:20:26,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:20:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-06-12 19:20:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2021-06-12 19:20:26,677 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2021-06-12 19:20:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:26,678 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2021-06-12 19:20:26,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2021-06-12 19:20:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:26,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:26,678 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 19:20:26,893 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash -654994843, now seen corresponding path program 10 times [2021-06-12 19:20:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481011384] [2021-06-12 19:20:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:26,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:26,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481011384] [2021-06-12 19:20:26,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481011384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:26,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394989601] [2021-06-12 19:20:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:26,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:26,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:26,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:27,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394989601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:27,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:27,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194172210] [2021-06-12 19:20:27,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:27,015 INFO L87 Difference]: Start difference. First operand 62 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:27,185 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-06-12 19:20:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:20:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:27,186 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:20:27,186 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 19:20:27,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 19:20:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-06-12 19:20:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-06-12 19:20:27,190 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2021-06-12 19:20:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:27,190 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-06-12 19:20:27,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-06-12 19:20:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:27,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:27,190 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:27,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 19:20:27,397 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1708400907, now seen corresponding path program 11 times [2021-06-12 19:20:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267250572] [2021-06-12 19:20:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:27,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267250572] [2021-06-12 19:20:27,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267250572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621804717] [2021-06-12 19:20:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:27,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:27,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621804717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:27,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475513256] [2021-06-12 19:20:27,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:27,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:27,523 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:27,626 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-12 19:20:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:27,627 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:20:27,627 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 19:20:27,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 19:20:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2021-06-12 19:20:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2021-06-12 19:20:27,630 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2021-06-12 19:20:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:27,631 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2021-06-12 19:20:27,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2021-06-12 19:20:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:27,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:27,631 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:27,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:27,855 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:27,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1243809803, now seen corresponding path program 12 times [2021-06-12 19:20:27,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:27,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832461115] [2021-06-12 19:20:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:27,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:27,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832461115] [2021-06-12 19:20:27,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832461115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169047661] [2021-06-12 19:20:27,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:27,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:27,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169047661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:27,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581391360] [2021-06-12 19:20:27,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:27,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:27,970 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:28,131 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-06-12 19:20:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:20:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:28,132 INFO L225 Difference]: With dead ends: 114 [2021-06-12 19:20:28,132 INFO L226 Difference]: Without dead ends: 110 [2021-06-12 19:20:28,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:20:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-12 19:20:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-06-12 19:20:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-06-12 19:20:28,135 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2021-06-12 19:20:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:28,135 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-06-12 19:20:28,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-06-12 19:20:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:28,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:28,136 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:28,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 19:20:28,357 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash -119765041, now seen corresponding path program 13 times [2021-06-12 19:20:28,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:28,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557257751] [2021-06-12 19:20:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:28,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:28,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557257751] [2021-06-12 19:20:28,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557257751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054427228] [2021-06-12 19:20:28,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054427228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:28,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143020927] [2021-06-12 19:20:28,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:28,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:28,488 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:28,610 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2021-06-12 19:20:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:28,611 INFO L225 Difference]: With dead ends: 132 [2021-06-12 19:20:28,611 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 19:20:28,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 19:20:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-06-12 19:20:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-06-12 19:20:28,614 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2021-06-12 19:20:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-06-12 19:20:28,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-06-12 19:20:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:28,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:28,615 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:28,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 19:20:28,839 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -841282353, now seen corresponding path program 14 times [2021-06-12 19:20:28,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:28,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199334880] [2021-06-12 19:20:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:28,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:28,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199334880] [2021-06-12 19:20:28,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199334880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713290965] [2021-06-12 19:20:28,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:28,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:28,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:28,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:28,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:28,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713290965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:28,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:20:28,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044780792] [2021-06-12 19:20:28,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:28,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:28,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:28,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:28,989 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:29,099 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2021-06-12 19:20:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:29,100 INFO L225 Difference]: With dead ends: 186 [2021-06-12 19:20:29,100 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:20:29,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:20:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-06-12 19:20:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-06-12 19:20:29,104 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2021-06-12 19:20:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:29,104 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-06-12 19:20:29,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:29,104 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-06-12 19:20:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:29,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:29,105 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:29,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 19:20:29,321 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1305873457, now seen corresponding path program 15 times [2021-06-12 19:20:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:29,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417244655] [2021-06-12 19:20:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:29,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:29,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417244655] [2021-06-12 19:20:29,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417244655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55972126] [2021-06-12 19:20:29,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:29,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:20:29,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:29,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55972126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:29,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:20:29,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19062103] [2021-06-12 19:20:29,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:29,482 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:29,644 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2021-06-12 19:20:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:29,645 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:20:29,645 INFO L226 Difference]: Without dead ends: 155 [2021-06-12 19:20:29,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-12 19:20:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-06-12 19:20:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-06-12 19:20:29,652 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2021-06-12 19:20:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:29,652 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-06-12 19:20:29,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-06-12 19:20:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:29,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:29,653 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:29,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 19:20:29,877 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:29,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1339472685, now seen corresponding path program 16 times [2021-06-12 19:20:29,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:29,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720001745] [2021-06-12 19:20:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:29,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720001745] [2021-06-12 19:20:29,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720001745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492416124] [2021-06-12 19:20:29,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:29,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492416124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:30,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:20:30,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188569204] [2021-06-12 19:20:30,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:30,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:30,024 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,198 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2021-06-12 19:20:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:20:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,199 INFO L225 Difference]: With dead ends: 146 [2021-06-12 19:20:30,199 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 19:20:30,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 19:20:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-06-12 19:20:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-06-12 19:20:30,203 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2021-06-12 19:20:30,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:30,203 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-06-12 19:20:30,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-06-12 19:20:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:30,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:30,203 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:30,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:30,413 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1363701933, now seen corresponding path program 17 times [2021-06-12 19:20:30,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:30,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140753173] [2021-06-12 19:20:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:30,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140753173] [2021-06-12 19:20:30,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140753173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620350517] [2021-06-12 19:20:30,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:30,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:30,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:30,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620350517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:30,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:20:30,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856144101] [2021-06-12 19:20:30,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:30,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:30,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:30,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:30,551 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,621 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2021-06-12 19:20:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:20:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,623 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:20:30,623 INFO L226 Difference]: Without dead ends: 128 [2021-06-12 19:20:30,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-12 19:20:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-06-12 19:20:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-06-12 19:20:30,626 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2021-06-12 19:20:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:30,626 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-06-12 19:20:30,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-06-12 19:20:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:30,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:30,626 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:30,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 19:20:30,848 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash -351009401, now seen corresponding path program 18 times [2021-06-12 19:20:30,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:30,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359045616] [2021-06-12 19:20:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359045616] [2021-06-12 19:20:30,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359045616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141725688] [2021-06-12 19:20:30,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:30,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:30,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:30,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141725688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:30,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:30,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385063792] [2021-06-12 19:20:30,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:30,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:30,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:30,960 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:31,083 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2021-06-12 19:20:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:31,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:31,083 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:20:31,084 INFO L226 Difference]: Without dead ends: 128 [2021-06-12 19:20:31,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-12 19:20:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-06-12 19:20:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-06-12 19:20:31,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2021-06-12 19:20:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:31,087 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-06-12 19:20:31,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-06-12 19:20:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:31,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:31,087 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:31,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 19:20:31,310 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1795161359, now seen corresponding path program 19 times [2021-06-12 19:20:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:31,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281157652] [2021-06-12 19:20:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:31,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:31,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281157652] [2021-06-12 19:20:31,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281157652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886086704] [2021-06-12 19:20:31,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:31,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:31,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886086704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:31,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:31,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592975411] [2021-06-12 19:20:31,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:31,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:31,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:31,418 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:31,534 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-06-12 19:20:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:31,535 INFO L225 Difference]: With dead ends: 175 [2021-06-12 19:20:31,535 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:20:31,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:20:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2021-06-12 19:20:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2021-06-12 19:20:31,538 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2021-06-12 19:20:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:31,539 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2021-06-12 19:20:31,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2021-06-12 19:20:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:31,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:31,539 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:31,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:31,753 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1928351131, now seen corresponding path program 20 times [2021-06-12 19:20:31,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:31,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260137054] [2021-06-12 19:20:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:31,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260137054] [2021-06-12 19:20:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260137054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379117605] [2021-06-12 19:20:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:31,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:31,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:31,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379117605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:31,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:31,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892744542] [2021-06-12 19:20:31,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:31,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:31,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:31,872 INFO L87 Difference]: Start difference. First operand 101 states and 246 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:32,021 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-06-12 19:20:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:20:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:32,022 INFO L225 Difference]: With dead ends: 143 [2021-06-12 19:20:32,022 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 19:20:32,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:20:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 19:20:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-06-12 19:20:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2021-06-12 19:20:32,025 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2021-06-12 19:20:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:32,026 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2021-06-12 19:20:32,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2021-06-12 19:20:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:32,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:32,026 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:32,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 19:20:32,250 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:32,250 INFO L82 PathProgramCache]: Analyzing trace with hash 435044619, now seen corresponding path program 21 times [2021-06-12 19:20:32,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:32,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682653565] [2021-06-12 19:20:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:32,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:32,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682653565] [2021-06-12 19:20:32,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682653565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670564260] [2021-06-12 19:20:32,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:32,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:32,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:32,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670564260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:32,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:32,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253588330] [2021-06-12 19:20:32,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:32,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:32,370 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:32,498 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-06-12 19:20:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:32,499 INFO L225 Difference]: With dead ends: 189 [2021-06-12 19:20:32,499 INFO L226 Difference]: Without dead ends: 189 [2021-06-12 19:20:32,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-12 19:20:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2021-06-12 19:20:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2021-06-12 19:20:32,505 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2021-06-12 19:20:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:32,505 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2021-06-12 19:20:32,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2021-06-12 19:20:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:32,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:32,506 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:32,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:32,729 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash -29546485, now seen corresponding path program 22 times [2021-06-12 19:20:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:32,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936282712] [2021-06-12 19:20:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:32,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:32,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936282712] [2021-06-12 19:20:32,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936282712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429022215] [2021-06-12 19:20:32,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:32,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:32,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:32,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429022215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:32,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773434948] [2021-06-12 19:20:32,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:32,851 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:33,010 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2021-06-12 19:20:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:20:33,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:33,011 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:20:33,011 INFO L226 Difference]: Without dead ends: 177 [2021-06-12 19:20:33,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-12 19:20:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2021-06-12 19:20:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2021-06-12 19:20:33,015 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2021-06-12 19:20:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:33,015 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2021-06-12 19:20:33,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2021-06-12 19:20:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:33,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:33,016 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:33,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 19:20:33,217 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash -63145713, now seen corresponding path program 23 times [2021-06-12 19:20:33,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:33,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845812224] [2021-06-12 19:20:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:33,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:33,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845812224] [2021-06-12 19:20:33,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845812224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087972598] [2021-06-12 19:20:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:33,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:33,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087972598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:33,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:20:33,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798236220] [2021-06-12 19:20:33,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:33,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:33,332 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:33,450 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-06-12 19:20:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:33,451 INFO L225 Difference]: With dead ends: 150 [2021-06-12 19:20:33,451 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:20:33,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:20:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-06-12 19:20:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2021-06-12 19:20:33,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2021-06-12 19:20:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:33,455 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2021-06-12 19:20:33,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2021-06-12 19:20:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:33,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:33,455 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:33,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 19:20:33,665 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1083715573, now seen corresponding path program 24 times [2021-06-12 19:20:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:33,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125236539] [2021-06-12 19:20:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:33,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:33,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125236539] [2021-06-12 19:20:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125236539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945620221] [2021-06-12 19:20:33,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:33,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:20:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:33,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945620221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:33,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:20:33,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508367744] [2021-06-12 19:20:33,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:33,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:33,796 INFO L87 Difference]: Start difference. First operand 101 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:33,851 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2021-06-12 19:20:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:20:33,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:33,852 INFO L225 Difference]: With dead ends: 114 [2021-06-12 19:20:33,852 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 19:20:33,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 19:20:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-06-12 19:20:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2021-06-12 19:20:33,855 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2021-06-12 19:20:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:33,855 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2021-06-12 19:20:33,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2021-06-12 19:20:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:33,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:33,855 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:34,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 19:20:34,077 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash 977688019, now seen corresponding path program 25 times [2021-06-12 19:20:34,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:34,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912088549] [2021-06-12 19:20:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:34,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:34,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912088549] [2021-06-12 19:20:34,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912088549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741521477] [2021-06-12 19:20:34,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:34,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:34,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741521477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:34,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:20:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729690850] [2021-06-12 19:20:34,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:34,222 INFO L87 Difference]: Start difference. First operand 101 states and 241 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:34,350 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2021-06-12 19:20:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:34,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:34,351 INFO L225 Difference]: With dead ends: 167 [2021-06-12 19:20:34,351 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 19:20:34,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 19:20:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-06-12 19:20:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2021-06-12 19:20:34,354 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2021-06-12 19:20:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:34,354 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2021-06-12 19:20:34,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2021-06-12 19:20:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:34,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:34,355 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:34,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:34,561 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash 935675603, now seen corresponding path program 26 times [2021-06-12 19:20:34,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:34,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678127536] [2021-06-12 19:20:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:34,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:34,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678127536] [2021-06-12 19:20:34,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678127536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594272062] [2021-06-12 19:20:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:34,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:34,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594272062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:34,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:20:34,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13334896] [2021-06-12 19:20:34,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:34,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:34,669 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:34,793 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-06-12 19:20:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:34,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:34,794 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:20:34,795 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:20:34,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:20:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2021-06-12 19:20:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2021-06-12 19:20:34,802 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2021-06-12 19:20:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:34,802 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2021-06-12 19:20:34,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2021-06-12 19:20:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:34,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:34,803 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:35,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 19:20:35,025 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1507130409, now seen corresponding path program 27 times [2021-06-12 19:20:35,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:35,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395301524] [2021-06-12 19:20:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:35,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:35,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395301524] [2021-06-12 19:20:35,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395301524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364482746] [2021-06-12 19:20:35,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:35,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:20:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:35,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:35,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364482746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:35,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:20:35,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565340264] [2021-06-12 19:20:35,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:35,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:35,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:35,121 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:35,262 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-06-12 19:20:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:35,263 INFO L225 Difference]: With dead ends: 201 [2021-06-12 19:20:35,263 INFO L226 Difference]: Without dead ends: 198 [2021-06-12 19:20:35,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-12 19:20:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2021-06-12 19:20:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2021-06-12 19:20:35,267 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2021-06-12 19:20:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:35,267 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2021-06-12 19:20:35,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2021-06-12 19:20:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:20:35,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:35,268 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:35,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:35,489 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2042360211, now seen corresponding path program 28 times [2021-06-12 19:20:35,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:35,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581389144] [2021-06-12 19:20:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:35,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581389144] [2021-06-12 19:20:35,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581389144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247276792] [2021-06-12 19:20:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:35,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:20:35,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:35,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247276792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:35,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:20:35,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393618910] [2021-06-12 19:20:35,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:35,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:35,614 INFO L87 Difference]: Start difference. First operand 109 states and 265 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:35,791 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-06-12 19:20:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:20:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:20:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:35,793 INFO L225 Difference]: With dead ends: 183 [2021-06-12 19:20:35,793 INFO L226 Difference]: Without dead ends: 177 [2021-06-12 19:20:35,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-12 19:20:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2021-06-12 19:20:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2021-06-12 19:20:35,796 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2021-06-12 19:20:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:35,796 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2021-06-12 19:20:35,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2021-06-12 19:20:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:35,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:35,797 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:36,013 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -601783285, now seen corresponding path program 29 times [2021-06-12 19:20:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656047574] [2021-06-12 19:20:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:36,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:36,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656047574] [2021-06-12 19:20:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656047574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208097683] [2021-06-12 19:20:36,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:36,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:36,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:36,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:36,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208097683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:36,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 19:20:36,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446065284] [2021-06-12 19:20:36,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:36,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:36,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:36,233 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:36,430 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2021-06-12 19:20:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:36,431 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:20:36,431 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:20:36,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:20:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2021-06-12 19:20:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2021-06-12 19:20:36,435 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2021-06-12 19:20:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:36,435 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2021-06-12 19:20:36,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2021-06-12 19:20:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:36,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:36,436 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:36,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 19:20:36,659 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash 838349055, now seen corresponding path program 30 times [2021-06-12 19:20:36,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:36,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569269478] [2021-06-12 19:20:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:36,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569269478] [2021-06-12 19:20:36,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569269478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567725883] [2021-06-12 19:20:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:36,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:36,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:36,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:36,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567725883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:36,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 19:20:36,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236788792] [2021-06-12 19:20:36,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:36,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:36,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:36,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:36,911 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:37,065 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-06-12 19:20:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:20:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:37,067 INFO L225 Difference]: With dead ends: 253 [2021-06-12 19:20:37,067 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 19:20:37,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 19:20:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-06-12 19:20:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2021-06-12 19:20:37,071 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2021-06-12 19:20:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:37,071 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2021-06-12 19:20:37,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2021-06-12 19:20:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:37,072 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:37,072 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:37,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 19:20:37,273 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1841915517, now seen corresponding path program 31 times [2021-06-12 19:20:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720367475] [2021-06-12 19:20:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:37,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720367475] [2021-06-12 19:20:37,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720367475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434374653] [2021-06-12 19:20:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:37,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434374653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:37,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 19:20:37,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782513565] [2021-06-12 19:20:37,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:37,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:37,501 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:37,665 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2021-06-12 19:20:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:37,666 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:20:37,666 INFO L226 Difference]: Without dead ends: 223 [2021-06-12 19:20:37,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-12 19:20:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2021-06-12 19:20:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-06-12 19:20:37,670 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-06-12 19:20:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:37,671 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-06-12 19:20:37,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-06-12 19:20:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:37,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:37,671 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:37,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 19:20:37,885 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1409803861, now seen corresponding path program 32 times [2021-06-12 19:20:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:37,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111155686] [2021-06-12 19:20:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:37,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111155686] [2021-06-12 19:20:37,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111155686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157692383] [2021-06-12 19:20:37,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:38,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:38,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:38,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:38,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157692383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:38,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 19:20:38,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429481845] [2021-06-12 19:20:38,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:38,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:38,107 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:38,258 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-06-12 19:20:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:38,259 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:20:38,259 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:20:38,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:20:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-06-12 19:20:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-06-12 19:20:38,263 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-06-12 19:20:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:38,263 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-06-12 19:20:38,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-06-12 19:20:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:38,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:38,264 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:38,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:38,477 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash 437462331, now seen corresponding path program 33 times [2021-06-12 19:20:38,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:38,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920203021] [2021-06-12 19:20:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920203021] [2021-06-12 19:20:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920203021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030598323] [2021-06-12 19:20:38,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:38,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:38,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030598323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:38,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 19:20:38,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452814659] [2021-06-12 19:20:38,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:38,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:38,687 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:38,793 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2021-06-12 19:20:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:20:38,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:38,794 INFO L225 Difference]: With dead ends: 218 [2021-06-12 19:20:38,794 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:20:38,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:20:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2021-06-12 19:20:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2021-06-12 19:20:38,800 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2021-06-12 19:20:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:38,800 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2021-06-12 19:20:38,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2021-06-12 19:20:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:38,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:38,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:39,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 19:20:39,017 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2052165055, now seen corresponding path program 34 times [2021-06-12 19:20:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:39,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134679217] [2021-06-12 19:20:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:39,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:39,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134679217] [2021-06-12 19:20:39,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134679217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216643574] [2021-06-12 19:20:39,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:39,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:39,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216643574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:39,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 19:20:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083430991] [2021-06-12 19:20:39,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:39,205 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:39,305 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2021-06-12 19:20:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:39,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:39,306 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:20:39,306 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:20:39,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:20:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-06-12 19:20:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-06-12 19:20:39,310 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-06-12 19:20:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:39,310 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-06-12 19:20:39,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-06-12 19:20:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:39,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:39,311 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:39,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 19:20:39,529 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash -27128773, now seen corresponding path program 35 times [2021-06-12 19:20:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:39,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383388949] [2021-06-12 19:20:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:39,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383388949] [2021-06-12 19:20:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383388949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455252462] [2021-06-12 19:20:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:39,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:39,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455252462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:39,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 19:20:39,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502308807] [2021-06-12 19:20:39,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:39,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:39,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:39,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:39,730 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:39,846 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2021-06-12 19:20:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:39,847 INFO L225 Difference]: With dead ends: 203 [2021-06-12 19:20:39,847 INFO L226 Difference]: Without dead ends: 196 [2021-06-12 19:20:39,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-12 19:20:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-06-12 19:20:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-06-12 19:20:39,851 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-06-12 19:20:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:39,851 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-06-12 19:20:39,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-06-12 19:20:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:39,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:39,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:40,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:40,061 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:40,061 INFO L82 PathProgramCache]: Analyzing trace with hash 894875775, now seen corresponding path program 36 times [2021-06-12 19:20:40,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:40,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174359638] [2021-06-12 19:20:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:40,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:40,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174359638] [2021-06-12 19:20:40,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174359638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768135203] [2021-06-12 19:20:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:40,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:40,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:40,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768135203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:40,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 19:20:40,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635925490] [2021-06-12 19:20:40,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:40,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:40,276 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:40,465 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2021-06-12 19:20:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:40,467 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:20:40,467 INFO L226 Difference]: Without dead ends: 259 [2021-06-12 19:20:40,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-12 19:20:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-06-12 19:20:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2021-06-12 19:20:40,471 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2021-06-12 19:20:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:40,471 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2021-06-12 19:20:40,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2021-06-12 19:20:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:40,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:40,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:40,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:40,695 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1785388797, now seen corresponding path program 37 times [2021-06-12 19:20:40,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:40,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431404236] [2021-06-12 19:20:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:40,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:40,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431404236] [2021-06-12 19:20:40,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431404236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740436220] [2021-06-12 19:20:40,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:40,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:40,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740436220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:40,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 19:20:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971689053] [2021-06-12 19:20:40,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:40,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:40,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:40,883 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:41,022 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2021-06-12 19:20:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:41,023 INFO L225 Difference]: With dead ends: 277 [2021-06-12 19:20:41,023 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:20:41,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:20:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2021-06-12 19:20:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2021-06-12 19:20:41,028 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2021-06-12 19:20:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:41,028 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2021-06-12 19:20:41,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2021-06-12 19:20:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:41,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:41,029 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:41,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:41,251 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash 430284671, now seen corresponding path program 38 times [2021-06-12 19:20:41,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:41,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870063859] [2021-06-12 19:20:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:41,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870063859] [2021-06-12 19:20:41,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870063859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231101063] [2021-06-12 19:20:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:41,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:41,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231101063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:41,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 19:20:41,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826496707] [2021-06-12 19:20:41,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:41,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:41,482 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:41,651 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2021-06-12 19:20:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:41,653 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:20:41,653 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 19:20:41,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 19:20:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2021-06-12 19:20:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2021-06-12 19:20:41,657 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2021-06-12 19:20:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:41,657 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2021-06-12 19:20:41,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2021-06-12 19:20:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:41,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:41,658 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:41,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:41,873 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 396685443, now seen corresponding path program 39 times [2021-06-12 19:20:41,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:41,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161902501] [2021-06-12 19:20:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:41,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161902501] [2021-06-12 19:20:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161902501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917435437] [2021-06-12 19:20:41,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:41,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:20:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:41,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:41,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917435437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 19:20:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788250008] [2021-06-12 19:20:42,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:42,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:42,071 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:42,221 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2021-06-12 19:20:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:42,223 INFO L225 Difference]: With dead ends: 233 [2021-06-12 19:20:42,223 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:20:42,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:20:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2021-06-12 19:20:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2021-06-12 19:20:42,227 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2021-06-12 19:20:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:42,227 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2021-06-12 19:20:42,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2021-06-12 19:20:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:42,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:42,228 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:42,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:42,441 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:42,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:42,441 INFO L82 PathProgramCache]: Analyzing trace with hash 852863359, now seen corresponding path program 40 times [2021-06-12 19:20:42,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:42,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291793923] [2021-06-12 19:20:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:42,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291793923] [2021-06-12 19:20:42,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291793923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543901364] [2021-06-12 19:20:42,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:42,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:42,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:42,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543901364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:42,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 19:20:42,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973824946] [2021-06-12 19:20:42,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:42,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:42,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:42,633 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:42,752 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2021-06-12 19:20:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:42,753 INFO L225 Difference]: With dead ends: 259 [2021-06-12 19:20:42,753 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:20:42,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:20:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-06-12 19:20:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2021-06-12 19:20:42,757 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2021-06-12 19:20:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:42,758 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2021-06-12 19:20:42,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2021-06-12 19:20:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:42,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:42,758 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:42,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:42,977 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1827401213, now seen corresponding path program 41 times [2021-06-12 19:20:42,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:42,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332402662] [2021-06-12 19:20:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:43,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332402662] [2021-06-12 19:20:43,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332402662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238846274] [2021-06-12 19:20:43,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:43,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238846274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:43,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 19:20:43,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169100338] [2021-06-12 19:20:43,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:43,183 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:43,281 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2021-06-12 19:20:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:20:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:43,282 INFO L225 Difference]: With dead ends: 247 [2021-06-12 19:20:43,282 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 19:20:43,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 19:20:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2021-06-12 19:20:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-06-12 19:20:43,286 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2021-06-12 19:20:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:43,286 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-06-12 19:20:43,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-06-12 19:20:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:20:43,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:43,287 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:43,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:43,497 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318165, now seen corresponding path program 42 times [2021-06-12 19:20:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:43,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229510666] [2021-06-12 19:20:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:43,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229510666] [2021-06-12 19:20:43,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229510666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507334341] [2021-06-12 19:20:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:43,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:43,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:20:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:43,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507334341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:43,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 19:20:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902122008] [2021-06-12 19:20:43,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:43,692 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:43,804 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2021-06-12 19:20:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:20:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:43,806 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:20:43,806 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 19:20:43,806 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 19:20:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-06-12 19:20:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-06-12 19:20:43,810 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2021-06-12 19:20:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:43,810 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-06-12 19:20:43,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-06-12 19:20:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:43,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:43,811 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:44,017 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1448785397, now seen corresponding path program 43 times [2021-06-12 19:20:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725197265] [2021-06-12 19:20:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:44,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725197265] [2021-06-12 19:20:44,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725197265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463292774] [2021-06-12 19:20:44,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463292774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:44,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 19:20:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561095640] [2021-06-12 19:20:44,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:44,162 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:44,258 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-06-12 19:20:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:44,260 INFO L225 Difference]: With dead ends: 295 [2021-06-12 19:20:44,260 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 19:20:44,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 19:20:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-06-12 19:20:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-06-12 19:20:44,264 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2021-06-12 19:20:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:44,264 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-06-12 19:20:44,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-06-12 19:20:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:44,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:44,265 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 19:20:44,481 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1017532901, now seen corresponding path program 44 times [2021-06-12 19:20:44,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803293509] [2021-06-12 19:20:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803293509] [2021-06-12 19:20:44,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803293509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890032211] [2021-06-12 19:20:44,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:44,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:44,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890032211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:44,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 19:20:44,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678940697] [2021-06-12 19:20:44,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:44,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:44,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:44,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:44,628 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:44,716 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2021-06-12 19:20:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:44,717 INFO L225 Difference]: With dead ends: 302 [2021-06-12 19:20:44,717 INFO L226 Difference]: Without dead ends: 302 [2021-06-12 19:20:44,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-12 19:20:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2021-06-12 19:20:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2021-06-12 19:20:44,722 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2021-06-12 19:20:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:44,722 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2021-06-12 19:20:44,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2021-06-12 19:20:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:44,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:44,723 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:44,937 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1381829455, now seen corresponding path program 45 times [2021-06-12 19:20:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420258288] [2021-06-12 19:20:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:44,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:44,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420258288] [2021-06-12 19:20:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420258288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381367392] [2021-06-12 19:20:44,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:45,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:45,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:45,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381367392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:45,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:45,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196845023] [2021-06-12 19:20:45,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:45,086 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:45,280 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2021-06-12 19:20:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:20:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:45,283 INFO L225 Difference]: With dead ends: 476 [2021-06-12 19:20:45,283 INFO L226 Difference]: Without dead ends: 474 [2021-06-12 19:20:45,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-12 19:20:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2021-06-12 19:20:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2021-06-12 19:20:45,289 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2021-06-12 19:20:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:45,289 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2021-06-12 19:20:45,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2021-06-12 19:20:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:45,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:45,289 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:45,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 19:20:45,512 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1953284261, now seen corresponding path program 46 times [2021-06-12 19:20:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:45,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169933227] [2021-06-12 19:20:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:45,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169933227] [2021-06-12 19:20:45,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169933227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957024495] [2021-06-12 19:20:45,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:45,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957024495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:45,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802896256] [2021-06-12 19:20:45,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:45,654 INFO L87 Difference]: Start difference. First operand 222 states and 607 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:45,912 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2021-06-12 19:20:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:20:45,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:45,914 INFO L225 Difference]: With dead ends: 476 [2021-06-12 19:20:45,914 INFO L226 Difference]: Without dead ends: 470 [2021-06-12 19:20:45,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:20:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-12 19:20:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2021-06-12 19:20:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2021-06-12 19:20:45,920 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2021-06-12 19:20:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:45,920 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2021-06-12 19:20:45,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2021-06-12 19:20:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:45,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:45,921 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:46,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 19:20:46,137 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 21712715, now seen corresponding path program 47 times [2021-06-12 19:20:46,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:46,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255870811] [2021-06-12 19:20:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:46,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:46,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255870811] [2021-06-12 19:20:46,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255870811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621810332] [2021-06-12 19:20:46,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:46,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:20:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621810332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:46,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:46,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138505778] [2021-06-12 19:20:46,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:46,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:46,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:46,267 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:46,472 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2021-06-12 19:20:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:20:46,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:46,476 INFO L225 Difference]: With dead ends: 423 [2021-06-12 19:20:46,476 INFO L226 Difference]: Without dead ends: 423 [2021-06-12 19:20:46,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:20:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-12 19:20:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2021-06-12 19:20:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2021-06-12 19:20:46,481 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2021-06-12 19:20:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:46,481 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2021-06-12 19:20:46,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2021-06-12 19:20:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:46,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:46,482 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:46,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 19:20:46,704 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -442878389, now seen corresponding path program 48 times [2021-06-12 19:20:46,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:46,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771234317] [2021-06-12 19:20:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771234317] [2021-06-12 19:20:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771234317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251836835] [2021-06-12 19:20:46,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:46,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:20:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:46,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251836835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:46,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:46,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10711100] [2021-06-12 19:20:46,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:46,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:46,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:46,843 INFO L87 Difference]: Start difference. First operand 211 states and 565 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:47,121 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2021-06-12 19:20:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:20:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:47,123 INFO L225 Difference]: With dead ends: 326 [2021-06-12 19:20:47,123 INFO L226 Difference]: Without dead ends: 322 [2021-06-12 19:20:47,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:20:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-12 19:20:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2021-06-12 19:20:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2021-06-12 19:20:47,127 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2021-06-12 19:20:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:47,127 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2021-06-12 19:20:47,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2021-06-12 19:20:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:47,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:47,128 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:47,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 19:20:47,345 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1806453233, now seen corresponding path program 49 times [2021-06-12 19:20:47,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:47,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494577690] [2021-06-12 19:20:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:47,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:47,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494577690] [2021-06-12 19:20:47,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494577690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441976448] [2021-06-12 19:20:47,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:47,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441976448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:47,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:47,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759639453] [2021-06-12 19:20:47,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:47,494 INFO L87 Difference]: Start difference. First operand 205 states and 544 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:47,733 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2021-06-12 19:20:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:20:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:47,735 INFO L225 Difference]: With dead ends: 460 [2021-06-12 19:20:47,735 INFO L226 Difference]: Without dead ends: 451 [2021-06-12 19:20:47,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:20:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-12 19:20:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2021-06-12 19:20:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2021-06-12 19:20:47,742 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2021-06-12 19:20:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:47,742 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2021-06-12 19:20:47,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2021-06-12 19:20:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:47,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:47,743 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:47,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 19:20:47,957 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1900768741, now seen corresponding path program 50 times [2021-06-12 19:20:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651105017] [2021-06-12 19:20:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:47,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:47,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651105017] [2021-06-12 19:20:47,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651105017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706588609] [2021-06-12 19:20:47,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:48,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:48,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:48,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:48,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:48,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706588609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:48,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:48,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359756543] [2021-06-12 19:20:48,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:48,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:48,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:48,095 INFO L87 Difference]: Start difference. First operand 215 states and 574 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:48,285 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2021-06-12 19:20:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:20:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:48,287 INFO L225 Difference]: With dead ends: 374 [2021-06-12 19:20:48,287 INFO L226 Difference]: Without dead ends: 365 [2021-06-12 19:20:48,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:20:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-12 19:20:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2021-06-12 19:20:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2021-06-12 19:20:48,293 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2021-06-12 19:20:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:48,294 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2021-06-12 19:20:48,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2021-06-12 19:20:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:48,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:48,294 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:48,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 19:20:48,501 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash 479126159, now seen corresponding path program 51 times [2021-06-12 19:20:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:48,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500002824] [2021-06-12 19:20:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:48,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:48,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500002824] [2021-06-12 19:20:48,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500002824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543471183] [2021-06-12 19:20:48,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:48,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:48,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:48,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:48,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:48,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543471183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:48,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:20:48,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025218126] [2021-06-12 19:20:48,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:48,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:48,643 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:48,827 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2021-06-12 19:20:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:20:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:48,842 INFO L225 Difference]: With dead ends: 439 [2021-06-12 19:20:48,842 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:20:48,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:20:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2021-06-12 19:20:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2021-06-12 19:20:48,848 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2021-06-12 19:20:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:48,848 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2021-06-12 19:20:48,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2021-06-12 19:20:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:48,849 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:48,849 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:49,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 19:20:49,069 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:49,070 INFO L82 PathProgramCache]: Analyzing trace with hash 14535055, now seen corresponding path program 52 times [2021-06-12 19:20:49,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:49,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041174043] [2021-06-12 19:20:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:49,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041174043] [2021-06-12 19:20:49,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041174043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865655006] [2021-06-12 19:20:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:49,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:49,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:49,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865655006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:49,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:20:49,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786847461] [2021-06-12 19:20:49,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:49,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:49,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:49,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:49,199 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:49,450 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2021-06-12 19:20:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:20:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:49,451 INFO L225 Difference]: With dead ends: 389 [2021-06-12 19:20:49,451 INFO L226 Difference]: Without dead ends: 383 [2021-06-12 19:20:49,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:20:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-12 19:20:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-06-12 19:20:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2021-06-12 19:20:49,460 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2021-06-12 19:20:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:49,460 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2021-06-12 19:20:49,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2021-06-12 19:20:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:49,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:49,461 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:49,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:49,683 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -19064173, now seen corresponding path program 53 times [2021-06-12 19:20:49,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:49,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062508468] [2021-06-12 19:20:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:49,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062508468] [2021-06-12 19:20:49,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062508468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750547294] [2021-06-12 19:20:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:49,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:49,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:49,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750547294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:49,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:20:49,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335516958] [2021-06-12 19:20:49,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:49,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:49,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:49,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:49,829 INFO L87 Difference]: Start difference. First operand 216 states and 570 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:50,127 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2021-06-12 19:20:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:20:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:50,129 INFO L225 Difference]: With dead ends: 347 [2021-06-12 19:20:50,129 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 19:20:50,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:20:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 19:20:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2021-06-12 19:20:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2021-06-12 19:20:50,134 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2021-06-12 19:20:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:50,134 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2021-06-12 19:20:50,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2021-06-12 19:20:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:50,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:50,135 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:50,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 19:20:50,358 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1774041035, now seen corresponding path program 54 times [2021-06-12 19:20:50,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:50,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384637217] [2021-06-12 19:20:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:50,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:50,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384637217] [2021-06-12 19:20:50,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384637217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126164035] [2021-06-12 19:20:50,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:50,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:20:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:50,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:50,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:50,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126164035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:50,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 19:20:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964192925] [2021-06-12 19:20:50,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:50,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:50,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:50,482 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:50,695 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2021-06-12 19:20:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:20:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:50,697 INFO L225 Difference]: With dead ends: 526 [2021-06-12 19:20:50,697 INFO L226 Difference]: Without dead ends: 523 [2021-06-12 19:20:50,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-12 19:20:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2021-06-12 19:20:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2021-06-12 19:20:50,703 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2021-06-12 19:20:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:50,703 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2021-06-12 19:20:50,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2021-06-12 19:20:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:50,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:50,704 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:50,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:50,913 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1309449931, now seen corresponding path program 55 times [2021-06-12 19:20:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:50,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333783221] [2021-06-12 19:20:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:50,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:50,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333783221] [2021-06-12 19:20:50,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333783221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875485806] [2021-06-12 19:20:50,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:51,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875485806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:51,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:51,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 19:20:51,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384191691] [2021-06-12 19:20:51,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:51,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:51,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:51,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:51,045 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:51,370 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2021-06-12 19:20:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:20:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:51,372 INFO L225 Difference]: With dead ends: 468 [2021-06-12 19:20:51,372 INFO L226 Difference]: Without dead ends: 464 [2021-06-12 19:20:51,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:20:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-12 19:20:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2021-06-12 19:20:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2021-06-12 19:20:51,376 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2021-06-12 19:20:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:51,376 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2021-06-12 19:20:51,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2021-06-12 19:20:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:51,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:51,377 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:51,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-12 19:20:51,601 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1275850703, now seen corresponding path program 56 times [2021-06-12 19:20:51,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:51,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790403879] [2021-06-12 19:20:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:51,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790403879] [2021-06-12 19:20:51,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790403879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:51,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982104323] [2021-06-12 19:20:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:51,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:51,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:51,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982104323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:51,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:51,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:20:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445269276] [2021-06-12 19:20:51,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:51,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:51,757 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:52,030 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2021-06-12 19:20:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:20:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:52,032 INFO L225 Difference]: With dead ends: 487 [2021-06-12 19:20:52,032 INFO L226 Difference]: Without dead ends: 479 [2021-06-12 19:20:52,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:20:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-12 19:20:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2021-06-12 19:20:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-06-12 19:20:52,037 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2021-06-12 19:20:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:52,037 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-06-12 19:20:52,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-06-12 19:20:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:52,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:52,038 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:52,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:52,253 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash 234274635, now seen corresponding path program 57 times [2021-06-12 19:20:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:52,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134446336] [2021-06-12 19:20:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:52,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134446336] [2021-06-12 19:20:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134446336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003495321] [2021-06-12 19:20:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:52,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:20:52,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:52,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003495321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:52,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:20:52,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925393612] [2021-06-12 19:20:52,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:20:52,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:52,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:20:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:52,412 INFO L87 Difference]: Start difference. First operand 293 states and 815 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:52,665 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2021-06-12 19:20:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:20:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:52,666 INFO L225 Difference]: With dead ends: 466 [2021-06-12 19:20:52,667 INFO L226 Difference]: Without dead ends: 454 [2021-06-12 19:20:52,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:20:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-12 19:20:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2021-06-12 19:20:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2021-06-12 19:20:52,674 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2021-06-12 19:20:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:52,674 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2021-06-12 19:20:52,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2021-06-12 19:20:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:52,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:52,675 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:52,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:52,885 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1797099147, now seen corresponding path program 58 times [2021-06-12 19:20:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677008173] [2021-06-12 19:20:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:52,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677008173] [2021-06-12 19:20:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677008173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846535410] [2021-06-12 19:20:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:52,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:52,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846535410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:53,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 19:20:53,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689652550] [2021-06-12 19:20:53,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:53,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:53,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:53,001 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:53,084 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2021-06-12 19:20:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:53,086 INFO L225 Difference]: With dead ends: 436 [2021-06-12 19:20:53,086 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:20:53,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:20:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2021-06-12 19:20:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2021-06-12 19:20:53,091 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2021-06-12 19:20:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:53,091 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2021-06-12 19:20:53,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2021-06-12 19:20:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:53,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:53,092 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:53,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:53,299 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1169170729, now seen corresponding path program 59 times [2021-06-12 19:20:53,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:53,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576769271] [2021-06-12 19:20:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:53,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576769271] [2021-06-12 19:20:53,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576769271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832541643] [2021-06-12 19:20:53,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:53,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:53,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832541643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:53,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:53,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223357548] [2021-06-12 19:20:53,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:53,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:53,445 INFO L87 Difference]: Start difference. First operand 316 states and 886 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:53,565 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2021-06-12 19:20:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:53,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:53,566 INFO L225 Difference]: With dead ends: 389 [2021-06-12 19:20:53,566 INFO L226 Difference]: Without dead ends: 389 [2021-06-12 19:20:53,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:20:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-12 19:20:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2021-06-12 19:20:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2021-06-12 19:20:53,570 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2021-06-12 19:20:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:53,570 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2021-06-12 19:20:53,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2021-06-12 19:20:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:53,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:53,571 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:53,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 19:20:53,773 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 937613391, now seen corresponding path program 60 times [2021-06-12 19:20:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43375642] [2021-06-12 19:20:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:53,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43375642] [2021-06-12 19:20:53,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43375642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583040490] [2021-06-12 19:20:53,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:53,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:53,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583040490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:53,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:53,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823838530] [2021-06-12 19:20:53,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:53,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:53,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:53,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:53,914 INFO L87 Difference]: Start difference. First operand 319 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:54,088 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2021-06-12 19:20:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:54,090 INFO L225 Difference]: With dead ends: 399 [2021-06-12 19:20:54,090 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 19:20:54,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 19:20:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2021-06-12 19:20:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2021-06-12 19:20:54,096 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2021-06-12 19:20:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:54,096 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2021-06-12 19:20:54,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2021-06-12 19:20:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:54,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:54,097 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:54,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:54,320 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1211183145, now seen corresponding path program 61 times [2021-06-12 19:20:54,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:54,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005101725] [2021-06-12 19:20:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:54,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005101725] [2021-06-12 19:20:54,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005101725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029452926] [2021-06-12 19:20:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:54,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029452926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:54,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:54,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:54,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765356501] [2021-06-12 19:20:54,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:54,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:54,457 INFO L87 Difference]: Start difference. First operand 322 states and 904 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:54,701 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2021-06-12 19:20:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:20:54,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:54,703 INFO L225 Difference]: With dead ends: 497 [2021-06-12 19:20:54,703 INFO L226 Difference]: Without dead ends: 497 [2021-06-12 19:20:54,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:20:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-12 19:20:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2021-06-12 19:20:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2021-06-12 19:20:54,714 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2021-06-12 19:20:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:54,714 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2021-06-12 19:20:54,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2021-06-12 19:20:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:54,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:54,715 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:54,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 19:20:54,926 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash -639728339, now seen corresponding path program 62 times [2021-06-12 19:20:54,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:54,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582675623] [2021-06-12 19:20:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:54,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:54,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582675623] [2021-06-12 19:20:54,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582675623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:54,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739302295] [2021-06-12 19:20:54,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:54,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:54,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:54,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:54,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:55,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739302295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:55,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114683128] [2021-06-12 19:20:55,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:55,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:55,040 INFO L87 Difference]: Start difference. First operand 319 states and 897 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:55,279 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2021-06-12 19:20:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:20:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:55,280 INFO L225 Difference]: With dead ends: 422 [2021-06-12 19:20:55,280 INFO L226 Difference]: Without dead ends: 416 [2021-06-12 19:20:55,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:20:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-12 19:20:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2021-06-12 19:20:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2021-06-12 19:20:55,285 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2021-06-12 19:20:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:55,285 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2021-06-12 19:20:55,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2021-06-12 19:20:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:55,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:55,286 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:55,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-12 19:20:55,486 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1723667411, now seen corresponding path program 63 times [2021-06-12 19:20:55,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:55,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133529649] [2021-06-12 19:20:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:55,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133529649] [2021-06-12 19:20:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133529649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984767054] [2021-06-12 19:20:55,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:55,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:20:55,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984767054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:55,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:55,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942938009] [2021-06-12 19:20:55,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:55,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:55,603 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:55,812 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2021-06-12 19:20:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:20:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:55,815 INFO L225 Difference]: With dead ends: 573 [2021-06-12 19:20:55,815 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 19:20:55,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 19:20:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2021-06-12 19:20:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2021-06-12 19:20:55,822 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2021-06-12 19:20:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:55,822 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2021-06-12 19:20:55,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2021-06-12 19:20:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:55,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:55,823 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:56,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 19:20:56,037 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1259076307, now seen corresponding path program 64 times [2021-06-12 19:20:56,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:56,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044896650] [2021-06-12 19:20:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:56,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044896650] [2021-06-12 19:20:56,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044896650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801834613] [2021-06-12 19:20:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:56,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:56,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:56,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801834613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:56,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536339589] [2021-06-12 19:20:56,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:56,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:56,175 INFO L87 Difference]: Start difference. First operand 353 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:56,420 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2021-06-12 19:20:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:20:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:56,422 INFO L225 Difference]: With dead ends: 554 [2021-06-12 19:20:56,422 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 19:20:56,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:20:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 19:20:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2021-06-12 19:20:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2021-06-12 19:20:56,427 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2021-06-12 19:20:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:56,427 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2021-06-12 19:20:56,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2021-06-12 19:20:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:56,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:56,428 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:56,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:56,628 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1225477079, now seen corresponding path program 65 times [2021-06-12 19:20:56,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:56,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071030279] [2021-06-12 19:20:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:56,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071030279] [2021-06-12 19:20:56,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071030279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303062378] [2021-06-12 19:20:56,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:56,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303062378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:56,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:56,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547653182] [2021-06-12 19:20:56,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:56,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:56,760 INFO L87 Difference]: Start difference. First operand 334 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:56,988 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2021-06-12 19:20:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:20:56,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:56,990 INFO L225 Difference]: With dead ends: 542 [2021-06-12 19:20:56,990 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 19:20:56,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:20:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 19:20:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2021-06-12 19:20:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2021-06-12 19:20:56,998 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2021-06-12 19:20:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:56,998 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2021-06-12 19:20:56,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2021-06-12 19:20:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:56,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:56,999 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:57,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 19:20:57,205 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 183901011, now seen corresponding path program 66 times [2021-06-12 19:20:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:57,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889707696] [2021-06-12 19:20:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889707696] [2021-06-12 19:20:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889707696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055772444] [2021-06-12 19:20:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:57,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:20:57,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055772444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:57,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:20:57,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066861140] [2021-06-12 19:20:57,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:57,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:57,344 INFO L87 Difference]: Start difference. First operand 348 states and 982 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:57,510 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2021-06-12 19:20:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:20:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:57,511 INFO L225 Difference]: With dead ends: 473 [2021-06-12 19:20:57,511 INFO L226 Difference]: Without dead ends: 467 [2021-06-12 19:20:57,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:20:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-12 19:20:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2021-06-12 19:20:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2021-06-12 19:20:57,516 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2021-06-12 19:20:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:57,516 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2021-06-12 19:20:57,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2021-06-12 19:20:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:57,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:57,517 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:57,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:57,723 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1388993577, now seen corresponding path program 67 times [2021-06-12 19:20:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:57,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429744505] [2021-06-12 19:20:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:57,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429744505] [2021-06-12 19:20:57,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429744505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856287509] [2021-06-12 19:20:57,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856287509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:57,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 19:20:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611977678] [2021-06-12 19:20:57,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:57,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:57,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:57,832 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:57,898 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-06-12 19:20:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:57,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:57,900 INFO L225 Difference]: With dead ends: 405 [2021-06-12 19:20:57,900 INFO L226 Difference]: Without dead ends: 397 [2021-06-12 19:20:57,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-12 19:20:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2021-06-12 19:20:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2021-06-12 19:20:57,906 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2021-06-12 19:20:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:57,906 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2021-06-12 19:20:57,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2021-06-12 19:20:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:57,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:57,907 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-12 19:20:58,121 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1365743627, now seen corresponding path program 68 times [2021-06-12 19:20:58,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:58,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561341983] [2021-06-12 19:20:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:58,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:58,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561341983] [2021-06-12 19:20:58,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561341983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565866726] [2021-06-12 19:20:58,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:58,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:58,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565866726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:58,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:20:58,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816756999] [2021-06-12 19:20:58,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:58,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:58,246 INFO L87 Difference]: Start difference. First operand 349 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:58,466 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2021-06-12 19:20:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:20:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:58,468 INFO L225 Difference]: With dead ends: 447 [2021-06-12 19:20:58,468 INFO L226 Difference]: Without dead ends: 447 [2021-06-12 19:20:58,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:20:58,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-12 19:20:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-06-12 19:20:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2021-06-12 19:20:58,474 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2021-06-12 19:20:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:58,474 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2021-06-12 19:20:58,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2021-06-12 19:20:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:58,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:58,475 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:58,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:58,676 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash 63358731, now seen corresponding path program 69 times [2021-06-12 19:20:58,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:58,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581006613] [2021-06-12 19:20:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:58,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:58,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581006613] [2021-06-12 19:20:58,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581006613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810795160] [2021-06-12 19:20:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:58,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:20:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:58,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:58,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810795160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:58,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:20:58,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139794287] [2021-06-12 19:20:58,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:58,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:58,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:58,822 INFO L87 Difference]: Start difference. First operand 354 states and 995 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:59,000 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2021-06-12 19:20:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:59,006 INFO L225 Difference]: With dead ends: 485 [2021-06-12 19:20:59,006 INFO L226 Difference]: Without dead ends: 483 [2021-06-12 19:20:59,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-12 19:20:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2021-06-12 19:20:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2021-06-12 19:20:59,015 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2021-06-12 19:20:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:59,016 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2021-06-12 19:20:59,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2021-06-12 19:20:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:59,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:59,016 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:59,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 19:20:59,233 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:59,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:59,233 INFO L82 PathProgramCache]: Analyzing trace with hash 21346315, now seen corresponding path program 70 times [2021-06-12 19:20:59,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:59,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135562161] [2021-06-12 19:20:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:59,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135562161] [2021-06-12 19:20:59,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135562161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426158135] [2021-06-12 19:20:59,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:59,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426158135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:59,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:20:59,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314371059] [2021-06-12 19:20:59,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:59,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:59,367 INFO L87 Difference]: Start difference. First operand 352 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:59,548 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2021-06-12 19:20:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:20:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:20:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:59,549 INFO L225 Difference]: With dead ends: 553 [2021-06-12 19:20:59,549 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 19:20:59,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 19:20:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2021-06-12 19:20:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2021-06-12 19:20:59,554 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2021-06-12 19:20:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:59,554 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2021-06-12 19:20:59,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:20:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2021-06-12 19:20:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:20:59,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:59,555 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:59,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:59,756 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash 592801121, now seen corresponding path program 71 times [2021-06-12 19:20:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:59,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283504869] [2021-06-12 19:20:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:59,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:59,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283504869] [2021-06-12 19:20:59,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283504869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556077307] [2021-06-12 19:20:59,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:59,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:20:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:59,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:20:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556077307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:59,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:20:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950389044] [2021-06-12 19:20:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:59,868 INFO L87 Difference]: Start difference. First operand 355 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:00,152 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2021-06-12 19:21:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:21:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:00,153 INFO L225 Difference]: With dead ends: 530 [2021-06-12 19:21:00,153 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 19:21:00,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:21:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 19:21:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2021-06-12 19:21:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2021-06-12 19:21:00,158 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2021-06-12 19:21:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:00,158 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2021-06-12 19:21:00,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2021-06-12 19:21:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:00,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:00,159 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:00,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 19:21:00,381 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1128030923, now seen corresponding path program 72 times [2021-06-12 19:21:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:00,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331373308] [2021-06-12 19:21:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:00,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331373308] [2021-06-12 19:21:00,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331373308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:00,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357112047] [2021-06-12 19:21:00,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:00,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357112047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:00,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:00,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:21:00,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206576267] [2021-06-12 19:21:00,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:00,541 INFO L87 Difference]: Start difference. First operand 341 states and 952 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:00,856 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-06-12 19:21:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:21:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:00,857 INFO L225 Difference]: With dead ends: 483 [2021-06-12 19:21:00,857 INFO L226 Difference]: Without dead ends: 471 [2021-06-12 19:21:00,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:21:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-12 19:21:00,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2021-06-12 19:21:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2021-06-12 19:21:00,861 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2021-06-12 19:21:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:00,862 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2021-06-12 19:21:00,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2021-06-12 19:21:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:00,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:00,862 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:01,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 19:21:01,063 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:01,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1656289961, now seen corresponding path program 73 times [2021-06-12 19:21:01,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:01,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566662630] [2021-06-12 19:21:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:01,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:01,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566662630] [2021-06-12 19:21:01,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566662630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:01,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941838463] [2021-06-12 19:21:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:01,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941838463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:01,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:01,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653806353] [2021-06-12 19:21:01,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:01,234 INFO L87 Difference]: Start difference. First operand 348 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:01,510 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2021-06-12 19:21:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:21:01,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:01,511 INFO L225 Difference]: With dead ends: 521 [2021-06-12 19:21:01,512 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 19:21:01,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:21:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 19:21:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-06-12 19:21:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2021-06-12 19:21:01,516 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2021-06-12 19:21:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:01,516 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2021-06-12 19:21:01,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2021-06-12 19:21:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:01,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:01,517 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:01,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:01,717 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1268731953, now seen corresponding path program 74 times [2021-06-12 19:21:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:01,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746080546] [2021-06-12 19:21:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:01,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:01,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746080546] [2021-06-12 19:21:01,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746080546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:01,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491544958] [2021-06-12 19:21:01,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:01,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:01,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:01,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:01,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491544958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:01,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:01,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:21:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135800121] [2021-06-12 19:21:01,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:01,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:01,842 INFO L87 Difference]: Start difference. First operand 368 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:02,049 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2021-06-12 19:21:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:02,050 INFO L225 Difference]: With dead ends: 613 [2021-06-12 19:21:02,050 INFO L226 Difference]: Without dead ends: 613 [2021-06-12 19:21:02,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:21:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-12 19:21:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2021-06-12 19:21:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2021-06-12 19:21:02,056 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2021-06-12 19:21:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:02,056 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2021-06-12 19:21:02,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2021-06-12 19:21:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:02,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:02,057 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:02,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-12 19:21:02,257 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash -424946089, now seen corresponding path program 75 times [2021-06-12 19:21:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:02,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696835337] [2021-06-12 19:21:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:02,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:02,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696835337] [2021-06-12 19:21:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696835337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707843218] [2021-06-12 19:21:02,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:02,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707843218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:02,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 19:21:02,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718724468] [2021-06-12 19:21:02,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:02,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:02,405 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:02,639 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2021-06-12 19:21:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:21:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:02,641 INFO L225 Difference]: With dead ends: 723 [2021-06-12 19:21:02,641 INFO L226 Difference]: Without dead ends: 723 [2021-06-12 19:21:02,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-06-12 19:21:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2021-06-12 19:21:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2021-06-12 19:21:02,650 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2021-06-12 19:21:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:02,650 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2021-06-12 19:21:02,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2021-06-12 19:21:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:02,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:02,651 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:02,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 19:21:02,873 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash 146508717, now seen corresponding path program 76 times [2021-06-12 19:21:02,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:02,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760574018] [2021-06-12 19:21:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:02,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:02,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760574018] [2021-06-12 19:21:02,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760574018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991071721] [2021-06-12 19:21:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:02,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:02,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:02,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991071721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:02,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-12 19:21:02,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705768341] [2021-06-12 19:21:02,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:02,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:02,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:02,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:02,983 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:03,316 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2021-06-12 19:21:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:21:03,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:03,317 INFO L225 Difference]: With dead ends: 693 [2021-06-12 19:21:03,317 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 19:21:03,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 19:21:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2021-06-12 19:21:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2021-06-12 19:21:03,324 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2021-06-12 19:21:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:03,324 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2021-06-12 19:21:03,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2021-06-12 19:21:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:03,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:03,325 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:03,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:03,525 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash 681738519, now seen corresponding path program 77 times [2021-06-12 19:21:03,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:03,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595342469] [2021-06-12 19:21:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:03,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595342469] [2021-06-12 19:21:03,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595342469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815937707] [2021-06-12 19:21:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:03,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:03,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815937707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:03,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:21:03,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599480638] [2021-06-12 19:21:03,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:03,687 INFO L87 Difference]: Start difference. First operand 463 states and 1335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:03,998 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2021-06-12 19:21:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:21:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:03,999 INFO L225 Difference]: With dead ends: 706 [2021-06-12 19:21:03,999 INFO L226 Difference]: Without dead ends: 694 [2021-06-12 19:21:04,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 281.7ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:21:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-12 19:21:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2021-06-12 19:21:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2021-06-12 19:21:04,006 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2021-06-12 19:21:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:04,006 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2021-06-12 19:21:04,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2021-06-12 19:21:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:21:04,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:04,007 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:04,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:04,207 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:04,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:04,208 INFO L82 PathProgramCache]: Analyzing trace with hash 93993197, now seen corresponding path program 78 times [2021-06-12 19:21:04,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:04,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020287925] [2021-06-12 19:21:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:04,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:04,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020287925] [2021-06-12 19:21:04,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020287925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211077112] [2021-06-12 19:21:04,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:04,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:04,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:21:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:04,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211077112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:04,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:21:04,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768724731] [2021-06-12 19:21:04,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:04,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:04,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:04,361 INFO L87 Difference]: Start difference. First operand 476 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:04,629 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2021-06-12 19:21:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:21:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:21:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:04,630 INFO L225 Difference]: With dead ends: 674 [2021-06-12 19:21:04,630 INFO L226 Difference]: Without dead ends: 656 [2021-06-12 19:21:04,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:21:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-12 19:21:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2021-06-12 19:21:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2021-06-12 19:21:04,637 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2021-06-12 19:21:04,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:04,637 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2021-06-12 19:21:04,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2021-06-12 19:21:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:04,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:04,638 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:04,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:04,838 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1452121605, now seen corresponding path program 79 times [2021-06-12 19:21:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:04,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022101906] [2021-06-12 19:21:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:04,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022101906] [2021-06-12 19:21:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022101906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110979079] [2021-06-12 19:21:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:05,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110979079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:05,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:05,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126191399] [2021-06-12 19:21:05,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:05,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:05,071 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:05,293 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2021-06-12 19:21:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:05,294 INFO L225 Difference]: With dead ends: 678 [2021-06-12 19:21:05,294 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 19:21:05,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 19:21:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2021-06-12 19:21:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2021-06-12 19:21:05,303 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2021-06-12 19:21:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:05,303 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2021-06-12 19:21:05,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2021-06-12 19:21:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:05,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:05,304 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:05,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:05,521 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:05,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:05,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1378493247, now seen corresponding path program 80 times [2021-06-12 19:21:05,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:05,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945765979] [2021-06-12 19:21:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:05,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945765979] [2021-06-12 19:21:05,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945765979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077899233] [2021-06-12 19:21:05,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:05,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:05,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077899233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:05,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:05,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079949053] [2021-06-12 19:21:05,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:05,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:05,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:05,754 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:05,926 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2021-06-12 19:21:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:05,928 INFO L225 Difference]: With dead ends: 714 [2021-06-12 19:21:05,928 INFO L226 Difference]: Without dead ends: 707 [2021-06-12 19:21:05,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-12 19:21:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2021-06-12 19:21:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2021-06-12 19:21:05,940 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2021-06-12 19:21:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:05,940 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2021-06-12 19:21:05,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2021-06-12 19:21:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:05,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:05,941 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:06,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 19:21:06,162 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1301771325, now seen corresponding path program 81 times [2021-06-12 19:21:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:06,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116493043] [2021-06-12 19:21:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:06,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116493043] [2021-06-12 19:21:06,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116493043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359139792] [2021-06-12 19:21:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:06,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:06,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359139792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:06,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:06,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517392516] [2021-06-12 19:21:06,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:06,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:06,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:06,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:06,375 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:06,563 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2021-06-12 19:21:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:06,565 INFO L225 Difference]: With dead ends: 700 [2021-06-12 19:21:06,565 INFO L226 Difference]: Without dead ends: 684 [2021-06-12 19:21:06,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-12 19:21:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2021-06-12 19:21:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-12 19:21:06,573 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-12 19:21:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:06,573 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-12 19:21:06,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-12 19:21:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:06,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:06,574 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 19:21:06,789 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1949948053, now seen corresponding path program 82 times [2021-06-12 19:21:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:06,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542005036] [2021-06-12 19:21:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:06,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542005036] [2021-06-12 19:21:06,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542005036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392214074] [2021-06-12 19:21:06,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:06,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392214074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:07,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:07,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90454902] [2021-06-12 19:21:07,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:07,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:07,047 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:07,254 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2021-06-12 19:21:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:07,255 INFO L225 Difference]: With dead ends: 698 [2021-06-12 19:21:07,255 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 19:21:07,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 19:21:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2021-06-12 19:21:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-12 19:21:07,264 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-12 19:21:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:07,264 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-12 19:21:07,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-12 19:21:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:07,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:07,265 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:07,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:07,466 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:07,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1809789441, now seen corresponding path program 83 times [2021-06-12 19:21:07,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:07,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808404393] [2021-06-12 19:21:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808404393] [2021-06-12 19:21:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808404393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164192666] [2021-06-12 19:21:07,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:07,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164192666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:07,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:07,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836358032] [2021-06-12 19:21:07,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:07,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:07,706 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:07,939 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2021-06-12 19:21:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:07,941 INFO L225 Difference]: With dead ends: 664 [2021-06-12 19:21:07,941 INFO L226 Difference]: Without dead ends: 657 [2021-06-12 19:21:07,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-12 19:21:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2021-06-12 19:21:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-06-12 19:21:07,954 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-06-12 19:21:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:07,954 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-06-12 19:21:07,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-06-12 19:21:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:07,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:07,955 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:08,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 19:21:08,169 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash -310264069, now seen corresponding path program 84 times [2021-06-12 19:21:08,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:08,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596478723] [2021-06-12 19:21:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:08,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596478723] [2021-06-12 19:21:08,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596478723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:08,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137774172] [2021-06-12 19:21:08,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:08,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:08,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:08,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137774172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:08,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:08,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 19:21:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600909812] [2021-06-12 19:21:08,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:08,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:08,447 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:08,586 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2021-06-12 19:21:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:08,588 INFO L225 Difference]: With dead ends: 660 [2021-06-12 19:21:08,588 INFO L226 Difference]: Without dead ends: 653 [2021-06-12 19:21:08,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-12 19:21:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2021-06-12 19:21:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2021-06-12 19:21:08,594 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2021-06-12 19:21:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:08,594 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2021-06-12 19:21:08,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2021-06-12 19:21:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:08,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:08,595 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:08,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 19:21:08,796 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1304438655, now seen corresponding path program 85 times [2021-06-12 19:21:08,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:08,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887315588] [2021-06-12 19:21:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:08,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887315588] [2021-06-12 19:21:08,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887315588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:08,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083398793] [2021-06-12 19:21:08,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:09,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083398793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:09,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:09,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:21:09,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531795672] [2021-06-12 19:21:09,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:09,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:09,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:09,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:09,040 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:09,203 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2021-06-12 19:21:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:09,205 INFO L225 Difference]: With dead ends: 661 [2021-06-12 19:21:09,205 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 19:21:09,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 19:21:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2021-06-12 19:21:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-06-12 19:21:09,213 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-06-12 19:21:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:09,213 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-06-12 19:21:09,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-06-12 19:21:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:09,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:09,214 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:09,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:09,439 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -774855173, now seen corresponding path program 86 times [2021-06-12 19:21:09,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:09,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35225272] [2021-06-12 19:21:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:09,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:09,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35225272] [2021-06-12 19:21:09,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35225272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:09,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701200327] [2021-06-12 19:21:09,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:09,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:09,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701200327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:09,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:09,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:21:09,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641233757] [2021-06-12 19:21:09,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:09,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:09,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:09,693 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:09,886 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2021-06-12 19:21:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:09,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:09,887 INFO L225 Difference]: With dead ends: 635 [2021-06-12 19:21:09,887 INFO L226 Difference]: Without dead ends: 628 [2021-06-12 19:21:09,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-12 19:21:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2021-06-12 19:21:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-06-12 19:21:09,895 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-06-12 19:21:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:09,895 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-06-12 19:21:09,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-06-12 19:21:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:09,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:09,896 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:10,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:10,101 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:10,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1122133313, now seen corresponding path program 87 times [2021-06-12 19:21:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:10,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411639323] [2021-06-12 19:21:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411639323] [2021-06-12 19:21:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411639323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321619997] [2021-06-12 19:21:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:10,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321619997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:10,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:10,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419467484] [2021-06-12 19:21:10,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:10,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:10,304 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:10,490 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2021-06-12 19:21:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:10,491 INFO L225 Difference]: With dead ends: 776 [2021-06-12 19:21:10,491 INFO L226 Difference]: Without dead ends: 759 [2021-06-12 19:21:10,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-12 19:21:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2021-06-12 19:21:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2021-06-12 19:21:10,499 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2021-06-12 19:21:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:10,499 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2021-06-12 19:21:10,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2021-06-12 19:21:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:10,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:10,500 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:10,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 19:21:10,700 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash 492569411, now seen corresponding path program 88 times [2021-06-12 19:21:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402375269] [2021-06-12 19:21:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:10,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402375269] [2021-06-12 19:21:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402375269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979375479] [2021-06-12 19:21:10,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:10,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:10,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979375479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:10,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:10,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:10,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951376376] [2021-06-12 19:21:10,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:10,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:10,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:10,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:10,936 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:11,113 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2021-06-12 19:21:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:11,114 INFO L225 Difference]: With dead ends: 774 [2021-06-12 19:21:11,114 INFO L226 Difference]: Without dead ends: 756 [2021-06-12 19:21:11,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-12 19:21:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2021-06-12 19:21:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2021-06-12 19:21:11,124 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2021-06-12 19:21:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:11,124 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2021-06-12 19:21:11,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2021-06-12 19:21:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:11,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:11,125 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:11,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 19:21:11,347 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1586724417, now seen corresponding path program 89 times [2021-06-12 19:21:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:11,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116896365] [2021-06-12 19:21:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:11,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116896365] [2021-06-12 19:21:11,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116896365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989235552] [2021-06-12 19:21:11,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:11,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:11,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989235552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:11,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:11,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:11,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064174314] [2021-06-12 19:21:11,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:11,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:11,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:11,557 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:11,779 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2021-06-12 19:21:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:11,781 INFO L225 Difference]: With dead ends: 744 [2021-06-12 19:21:11,781 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 19:21:11,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 19:21:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2021-06-12 19:21:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2021-06-12 19:21:11,790 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2021-06-12 19:21:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:11,790 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2021-06-12 19:21:11,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2021-06-12 19:21:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:11,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:11,791 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:12,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:12,014 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1620323645, now seen corresponding path program 90 times [2021-06-12 19:21:12,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:12,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179013513] [2021-06-12 19:21:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:12,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179013513] [2021-06-12 19:21:12,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179013513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253097467] [2021-06-12 19:21:12,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:12,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:12,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253097467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:12,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:12,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123123534] [2021-06-12 19:21:12,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:12,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:12,222 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:12,398 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2021-06-12 19:21:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:12,399 INFO L225 Difference]: With dead ends: 695 [2021-06-12 19:21:12,399 INFO L226 Difference]: Without dead ends: 688 [2021-06-12 19:21:12,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-12 19:21:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2021-06-12 19:21:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2021-06-12 19:21:12,406 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2021-06-12 19:21:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:12,406 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2021-06-12 19:21:12,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2021-06-12 19:21:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:12,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:12,407 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:12,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:12,629 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash -592690923, now seen corresponding path program 91 times [2021-06-12 19:21:12,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:12,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728795397] [2021-06-12 19:21:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:12,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:12,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728795397] [2021-06-12 19:21:12,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728795397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028262561] [2021-06-12 19:21:12,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:12,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028262561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:12,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:12,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:21:12,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966273536] [2021-06-12 19:21:12,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:12,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:12,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:12,842 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:12,993 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2021-06-12 19:21:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:21:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:12,994 INFO L225 Difference]: With dead ends: 647 [2021-06-12 19:21:12,994 INFO L226 Difference]: Without dead ends: 634 [2021-06-12 19:21:12,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-12 19:21:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2021-06-12 19:21:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2021-06-12 19:21:13,001 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2021-06-12 19:21:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:13,001 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2021-06-12 19:21:13,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2021-06-12 19:21:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:13,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:13,002 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:13,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 19:21:13,217 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash -520276101, now seen corresponding path program 92 times [2021-06-12 19:21:13,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:13,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667088000] [2021-06-12 19:21:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:13,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:13,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667088000] [2021-06-12 19:21:13,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667088000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:13,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394932585] [2021-06-12 19:21:13,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:13,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:13,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:13,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394932585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882727077] [2021-06-12 19:21:13,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:13,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:13,413 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:13,615 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2021-06-12 19:21:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:13,617 INFO L225 Difference]: With dead ends: 798 [2021-06-12 19:21:13,617 INFO L226 Difference]: Without dead ends: 781 [2021-06-12 19:21:13,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-12 19:21:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2021-06-12 19:21:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2021-06-12 19:21:13,627 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2021-06-12 19:21:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:13,628 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2021-06-12 19:21:13,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2021-06-12 19:21:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:13,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:13,629 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:13,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:13,845 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1094426623, now seen corresponding path program 93 times [2021-06-12 19:21:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:13,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285346753] [2021-06-12 19:21:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:13,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:13,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285346753] [2021-06-12 19:21:13,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285346753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:13,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031284139] [2021-06-12 19:21:13,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:13,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:13,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:14,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031284139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:14,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:14,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720624273] [2021-06-12 19:21:14,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:14,074 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:14,264 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2021-06-12 19:21:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:14,266 INFO L225 Difference]: With dead ends: 796 [2021-06-12 19:21:14,266 INFO L226 Difference]: Without dead ends: 780 [2021-06-12 19:21:14,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-12 19:21:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2021-06-12 19:21:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2021-06-12 19:21:14,274 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2021-06-12 19:21:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:14,274 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2021-06-12 19:21:14,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2021-06-12 19:21:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:14,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:14,275 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:14,493 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -984867205, now seen corresponding path program 94 times [2021-06-12 19:21:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816354356] [2021-06-12 19:21:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:14,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:14,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816354356] [2021-06-12 19:21:14,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816354356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:14,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727292529] [2021-06-12 19:21:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:14,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:14,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:14,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727292529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:14,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:14,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515345241] [2021-06-12 19:21:14,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:14,686 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:14,907 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2021-06-12 19:21:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:14,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:14,908 INFO L225 Difference]: With dead ends: 809 [2021-06-12 19:21:14,908 INFO L226 Difference]: Without dead ends: 791 [2021-06-12 19:21:14,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-06-12 19:21:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2021-06-12 19:21:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2021-06-12 19:21:14,914 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2021-06-12 19:21:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:14,914 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2021-06-12 19:21:14,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2021-06-12 19:21:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:14,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:14,915 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:15,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 19:21:15,116 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1018466433, now seen corresponding path program 95 times [2021-06-12 19:21:15,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:15,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886057287] [2021-06-12 19:21:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:15,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886057287] [2021-06-12 19:21:15,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886057287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:15,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223491698] [2021-06-12 19:21:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:15,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:15,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:15,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223491698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:15,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:15,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:15,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398285972] [2021-06-12 19:21:15,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:15,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:15,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:15,359 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:15,630 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2021-06-12 19:21:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:15,632 INFO L225 Difference]: With dead ends: 764 [2021-06-12 19:21:15,632 INFO L226 Difference]: Without dead ends: 744 [2021-06-12 19:21:15,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-12 19:21:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2021-06-12 19:21:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2021-06-12 19:21:15,639 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2021-06-12 19:21:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:15,640 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2021-06-12 19:21:15,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2021-06-12 19:21:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:15,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:15,640 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:15,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:15,841 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2060042501, now seen corresponding path program 96 times [2021-06-12 19:21:15,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:15,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323512563] [2021-06-12 19:21:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:15,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323512563] [2021-06-12 19:21:15,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323512563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569711755] [2021-06-12 19:21:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:15,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:16,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569711755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:16,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:16,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:21:16,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214353715] [2021-06-12 19:21:16,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:16,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:16,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:16,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:16,092 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:16,380 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2021-06-12 19:21:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:16,382 INFO L225 Difference]: With dead ends: 713 [2021-06-12 19:21:16,382 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 19:21:16,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 19:21:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2021-06-12 19:21:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2021-06-12 19:21:16,389 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2021-06-12 19:21:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:16,389 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2021-06-12 19:21:16,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2021-06-12 19:21:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:16,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:16,390 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:16,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-12 19:21:16,593 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash 323509763, now seen corresponding path program 97 times [2021-06-12 19:21:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:16,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093481589] [2021-06-12 19:21:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:16,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:16,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093481589] [2021-06-12 19:21:16,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093481589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:16,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65404344] [2021-06-12 19:21:16,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:16,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:16,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65404344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:16,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:16,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:21:16,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049006575] [2021-06-12 19:21:16,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:16,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:16,794 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:16,933 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2021-06-12 19:21:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:16,934 INFO L225 Difference]: With dead ends: 753 [2021-06-12 19:21:16,934 INFO L226 Difference]: Without dead ends: 743 [2021-06-12 19:21:16,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-12 19:21:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2021-06-12 19:21:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2021-06-12 19:21:16,941 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2021-06-12 19:21:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:16,941 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2021-06-12 19:21:16,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2021-06-12 19:21:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:16,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:16,941 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:17,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:17,142 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1938212487, now seen corresponding path program 98 times [2021-06-12 19:21:17,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:17,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050587456] [2021-06-12 19:21:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050587456] [2021-06-12 19:21:17,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050587456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777833314] [2021-06-12 19:21:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:17,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:17,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:17,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777833314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:17,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:21:17,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931236955] [2021-06-12 19:21:17,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:17,398 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:17,561 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2021-06-12 19:21:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:17,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:17,563 INFO L225 Difference]: With dead ends: 735 [2021-06-12 19:21:17,563 INFO L226 Difference]: Without dead ends: 728 [2021-06-12 19:21:17,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-12 19:21:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2021-06-12 19:21:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2021-06-12 19:21:17,572 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2021-06-12 19:21:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:17,572 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2021-06-12 19:21:17,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2021-06-12 19:21:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:17,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:17,573 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:17,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 19:21:17,789 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash 894964569, now seen corresponding path program 99 times [2021-06-12 19:21:17,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:17,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188475441] [2021-06-12 19:21:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:17,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188475441] [2021-06-12 19:21:17,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188475441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353610122] [2021-06-12 19:21:17,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:17,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:21:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:17,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353610122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:17,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:18,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-12 19:21:18,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209843822] [2021-06-12 19:21:18,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:18,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:18,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:18,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:18,000 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:18,131 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2021-06-12 19:21:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:18,132 INFO L225 Difference]: With dead ends: 709 [2021-06-12 19:21:18,132 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 19:21:18,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 19:21:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2021-06-12 19:21:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2021-06-12 19:21:18,139 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2021-06-12 19:21:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:18,139 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2021-06-12 19:21:18,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2021-06-12 19:21:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:18,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:18,139 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:18,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:18,340 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:18,340 INFO L82 PathProgramCache]: Analyzing trace with hash 711067771, now seen corresponding path program 100 times [2021-06-12 19:21:18,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:18,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120257224] [2021-06-12 19:21:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:18,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:18,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120257224] [2021-06-12 19:21:18,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120257224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:18,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362435063] [2021-06-12 19:21:18,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:18,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:18,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362435063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:18,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:18,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:18,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492279209] [2021-06-12 19:21:18,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:18,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:18,548 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:18,703 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2021-06-12 19:21:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:18,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:18,705 INFO L225 Difference]: With dead ends: 809 [2021-06-12 19:21:18,705 INFO L226 Difference]: Without dead ends: 799 [2021-06-12 19:21:18,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-12 19:21:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2021-06-12 19:21:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2021-06-12 19:21:18,712 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2021-06-12 19:21:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:18,712 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2021-06-12 19:21:18,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2021-06-12 19:21:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:18,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:18,713 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:18,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:18,917 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1969196801, now seen corresponding path program 101 times [2021-06-12 19:21:18,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:18,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114033642] [2021-06-12 19:21:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:19,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114033642] [2021-06-12 19:21:19,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114033642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335235235] [2021-06-12 19:21:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:19,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:19,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335235235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:19,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:19,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531600007] [2021-06-12 19:21:19,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:19,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:19,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:19,117 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:19,275 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2021-06-12 19:21:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:19,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:19,276 INFO L225 Difference]: With dead ends: 793 [2021-06-12 19:21:19,276 INFO L226 Difference]: Without dead ends: 786 [2021-06-12 19:21:19,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-12 19:21:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2021-06-12 19:21:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2021-06-12 19:21:19,283 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2021-06-12 19:21:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:19,283 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2021-06-12 19:21:19,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2021-06-12 19:21:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:19,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:19,284 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:19,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-12 19:21:19,484 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1282522577, now seen corresponding path program 102 times [2021-06-12 19:21:19,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:19,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854071172] [2021-06-12 19:21:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:19,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854071172] [2021-06-12 19:21:19,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854071172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163041013] [2021-06-12 19:21:19,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:19,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163041013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:19,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:19,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298564193] [2021-06-12 19:21:19,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:19,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:19,680 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:19,843 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2021-06-12 19:21:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:19,844 INFO L225 Difference]: With dead ends: 788 [2021-06-12 19:21:19,844 INFO L226 Difference]: Without dead ends: 775 [2021-06-12 19:21:19,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-12 19:21:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2021-06-12 19:21:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2021-06-12 19:21:19,853 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2021-06-12 19:21:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:19,854 INFO L482 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2021-06-12 19:21:19,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2021-06-12 19:21:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:21:19,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:19,855 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:20,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 19:21:20,076 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1817752379, now seen corresponding path program 103 times [2021-06-12 19:21:20,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:20,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778999853] [2021-06-12 19:21:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:20,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778999853] [2021-06-12 19:21:20,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778999853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792303100] [2021-06-12 19:21:20,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792303100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:20,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 19:21:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719704394] [2021-06-12 19:21:20,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:20,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:20,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:20,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:20,316 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:20,523 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2021-06-12 19:21:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:21:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:20,524 INFO L225 Difference]: With dead ends: 748 [2021-06-12 19:21:20,524 INFO L226 Difference]: Without dead ends: 741 [2021-06-12 19:21:20,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-12 19:21:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2021-06-12 19:21:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2021-06-12 19:21:20,531 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2021-06-12 19:21:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:20,531 INFO L482 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2021-06-12 19:21:20,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2021-06-12 19:21:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:20,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:20,532 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:20,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:20,732 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2039469541, now seen corresponding path program 104 times [2021-06-12 19:21:20,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:20,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651851051] [2021-06-12 19:21:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:20,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651851051] [2021-06-12 19:21:20,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651851051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42624824] [2021-06-12 19:21:20,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:20,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:20,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:20,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:20,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42624824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:20,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:21:20,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723409446] [2021-06-12 19:21:20,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:20,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:20,868 INFO L87 Difference]: Start difference. First operand 636 states and 1847 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:20,967 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2021-06-12 19:21:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:20,969 INFO L225 Difference]: With dead ends: 972 [2021-06-12 19:21:20,969 INFO L226 Difference]: Without dead ends: 955 [2021-06-12 19:21:20,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-12 19:21:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2021-06-12 19:21:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2021-06-12 19:21:20,979 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2021-06-12 19:21:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:20,979 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2021-06-12 19:21:20,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2021-06-12 19:21:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:20,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:20,980 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:21,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:21,200 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1555544053, now seen corresponding path program 105 times [2021-06-12 19:21:21,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:21,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184990992] [2021-06-12 19:21:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:21,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184990992] [2021-06-12 19:21:21,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184990992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945002921] [2021-06-12 19:21:21,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:21,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:21,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945002921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:21,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:21:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722157004] [2021-06-12 19:21:21,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:21,367 INFO L87 Difference]: Start difference. First operand 631 states and 1837 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:21,492 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2021-06-12 19:21:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:21,494 INFO L225 Difference]: With dead ends: 996 [2021-06-12 19:21:21,494 INFO L226 Difference]: Without dead ends: 996 [2021-06-12 19:21:21,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-12 19:21:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2021-06-12 19:21:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2021-06-12 19:21:21,505 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2021-06-12 19:21:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:21,506 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2021-06-12 19:21:21,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2021-06-12 19:21:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:21,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:21,508 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:21,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:21,721 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash 946430223, now seen corresponding path program 106 times [2021-06-12 19:21:21,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:21,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656531420] [2021-06-12 19:21:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:21,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656531420] [2021-06-12 19:21:21,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656531420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311059435] [2021-06-12 19:21:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:21,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:21,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:21,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311059435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:21,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101217104] [2021-06-12 19:21:21,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:21,871 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:22,181 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2021-06-12 19:21:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:21:22,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:22,183 INFO L225 Difference]: With dead ends: 1332 [2021-06-12 19:21:22,183 INFO L226 Difference]: Without dead ends: 1326 [2021-06-12 19:21:22,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:21:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-12 19:21:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2021-06-12 19:21:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2021-06-12 19:21:22,193 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2021-06-12 19:21:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:22,193 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2021-06-12 19:21:22,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2021-06-12 19:21:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:22,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:22,194 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:22,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 19:21:22,395 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1517885029, now seen corresponding path program 107 times [2021-06-12 19:21:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:22,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713298482] [2021-06-12 19:21:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:22,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:22,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713298482] [2021-06-12 19:21:22,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713298482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:22,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57258500] [2021-06-12 19:21:22,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:22,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:22,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:22,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57258500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:22,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:22,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:22,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243771077] [2021-06-12 19:21:22,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:22,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:22,565 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:22,936 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2021-06-12 19:21:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:21:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:22,937 INFO L225 Difference]: With dead ends: 1321 [2021-06-12 19:21:22,937 INFO L226 Difference]: Without dead ends: 1315 [2021-06-12 19:21:22,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:21:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-12 19:21:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2021-06-12 19:21:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2021-06-12 19:21:22,946 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2021-06-12 19:21:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:22,946 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2021-06-12 19:21:22,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2021-06-12 19:21:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:22,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:22,947 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:23,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 19:21:23,148 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -413686517, now seen corresponding path program 108 times [2021-06-12 19:21:23,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:23,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288814293] [2021-06-12 19:21:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288814293] [2021-06-12 19:21:23,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288814293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131724836] [2021-06-12 19:21:23,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:23,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:23,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:23,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131724836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:23,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:23,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576975879] [2021-06-12 19:21:23,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:23,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:23,315 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:23,684 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2021-06-12 19:21:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:21:23,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:23,686 INFO L225 Difference]: With dead ends: 1177 [2021-06-12 19:21:23,686 INFO L226 Difference]: Without dead ends: 1177 [2021-06-12 19:21:23,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:21:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-12 19:21:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2021-06-12 19:21:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2021-06-12 19:21:23,701 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2021-06-12 19:21:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:23,701 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2021-06-12 19:21:23,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2021-06-12 19:21:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:23,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:23,702 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:23,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 19:21:23,902 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash -878277621, now seen corresponding path program 109 times [2021-06-12 19:21:23,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:23,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986246132] [2021-06-12 19:21:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:23,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:23,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986246132] [2021-06-12 19:21:23,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986246132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741237863] [2021-06-12 19:21:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:24,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741237863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:24,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:24,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960639202] [2021-06-12 19:21:24,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:24,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:24,065 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:24,458 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2021-06-12 19:21:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:21:24,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:24,460 INFO L225 Difference]: With dead ends: 1009 [2021-06-12 19:21:24,460 INFO L226 Difference]: Without dead ends: 1005 [2021-06-12 19:21:24,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:21:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-12 19:21:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2021-06-12 19:21:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2021-06-12 19:21:24,479 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2021-06-12 19:21:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:24,479 INFO L482 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2021-06-12 19:21:24,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2021-06-12 19:21:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:24,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:24,480 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:24,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-12 19:21:24,681 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2053114831, now seen corresponding path program 110 times [2021-06-12 19:21:24,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:24,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268309559] [2021-06-12 19:21:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:24,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:24,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268309559] [2021-06-12 19:21:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268309559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469812721] [2021-06-12 19:21:24,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:24,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469812721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078782455] [2021-06-12 19:21:24,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:24,831 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:25,169 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2021-06-12 19:21:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:21:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:25,170 INFO L225 Difference]: With dead ends: 1249 [2021-06-12 19:21:25,170 INFO L226 Difference]: Without dead ends: 1240 [2021-06-12 19:21:25,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:21:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-12 19:21:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2021-06-12 19:21:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2021-06-12 19:21:25,180 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2021-06-12 19:21:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:25,180 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2021-06-12 19:21:25,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2021-06-12 19:21:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:25,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:25,181 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:25,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 19:21:25,381 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1465369509, now seen corresponding path program 111 times [2021-06-12 19:21:25,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:25,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379211146] [2021-06-12 19:21:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:25,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379211146] [2021-06-12 19:21:25,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379211146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731099779] [2021-06-12 19:21:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:25,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:25,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731099779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922031523] [2021-06-12 19:21:25,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:25,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:25,524 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:25,840 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2021-06-12 19:21:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:21:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:25,841 INFO L225 Difference]: With dead ends: 1262 [2021-06-12 19:21:25,841 INFO L226 Difference]: Without dead ends: 1250 [2021-06-12 19:21:25,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:21:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-12 19:21:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2021-06-12 19:21:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2021-06-12 19:21:25,851 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2021-06-12 19:21:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:25,851 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2021-06-12 19:21:25,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2021-06-12 19:21:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:25,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:25,852 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:26,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:26,052 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash 425133711, now seen corresponding path program 112 times [2021-06-12 19:21:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:26,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108190642] [2021-06-12 19:21:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:26,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108190642] [2021-06-12 19:21:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108190642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385873226] [2021-06-12 19:21:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:26,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:26,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385873226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:26,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:26,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:26,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698530678] [2021-06-12 19:21:26,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:26,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:26,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:26,203 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:26,428 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2021-06-12 19:21:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:21:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:26,429 INFO L225 Difference]: With dead ends: 1109 [2021-06-12 19:21:26,429 INFO L226 Difference]: Without dead ends: 1097 [2021-06-12 19:21:26,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:21:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-06-12 19:21:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2021-06-12 19:21:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2021-06-12 19:21:26,437 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2021-06-12 19:21:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:26,438 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2021-06-12 19:21:26,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2021-06-12 19:21:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:26,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:26,438 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:26,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-12 19:21:26,639 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1225555761, now seen corresponding path program 113 times [2021-06-12 19:21:26,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:26,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896996937] [2021-06-12 19:21:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:26,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:26,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896996937] [2021-06-12 19:21:26,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896996937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:26,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100852311] [2021-06-12 19:21:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:26,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:26,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100852311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:26,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:26,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 19:21:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986287419] [2021-06-12 19:21:26,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:26,777 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:27,137 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2021-06-12 19:21:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:21:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:27,139 INFO L225 Difference]: With dead ends: 1207 [2021-06-12 19:21:27,139 INFO L226 Difference]: Without dead ends: 1201 [2021-06-12 19:21:27,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:21:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-12 19:21:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2021-06-12 19:21:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2021-06-12 19:21:27,148 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2021-06-12 19:21:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:27,148 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2021-06-12 19:21:27,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2021-06-12 19:21:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:27,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:27,149 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:27,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:27,371 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1690146865, now seen corresponding path program 114 times [2021-06-12 19:21:27,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:27,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601458973] [2021-06-12 19:21:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:27,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:27,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601458973] [2021-06-12 19:21:27,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601458973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:27,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687105997] [2021-06-12 19:21:27,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:27,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:21:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:27,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687105997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:27,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:27,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 19:21:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095038588] [2021-06-12 19:21:27,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:27,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:27,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:27,532 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:27,969 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2021-06-12 19:21:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:21:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:27,970 INFO L225 Difference]: With dead ends: 1081 [2021-06-12 19:21:27,971 INFO L226 Difference]: Without dead ends: 1075 [2021-06-12 19:21:27,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:21:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-12 19:21:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2021-06-12 19:21:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2021-06-12 19:21:27,980 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2021-06-12 19:21:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:27,980 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2021-06-12 19:21:27,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2021-06-12 19:21:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:27,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:27,981 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:28,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-12 19:21:28,185 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1723746093, now seen corresponding path program 115 times [2021-06-12 19:21:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656692486] [2021-06-12 19:21:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:28,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:28,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656692486] [2021-06-12 19:21:28,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656692486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141069095] [2021-06-12 19:21:28,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141069095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:28,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:21:28,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183167394] [2021-06-12 19:21:28,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:28,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:28,331 INFO L87 Difference]: Start difference. First operand 726 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:28,734 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2021-06-12 19:21:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:21:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:28,735 INFO L225 Difference]: With dead ends: 974 [2021-06-12 19:21:28,735 INFO L226 Difference]: Without dead ends: 966 [2021-06-12 19:21:28,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:21:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-12 19:21:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2021-06-12 19:21:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2021-06-12 19:21:28,743 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2021-06-12 19:21:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:28,743 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2021-06-12 19:21:28,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2021-06-12 19:21:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:28,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:28,744 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:28,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-12 19:21:28,945 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:28,945 INFO L82 PathProgramCache]: Analyzing trace with hash -623698549, now seen corresponding path program 116 times [2021-06-12 19:21:28,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:28,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682255801] [2021-06-12 19:21:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:28,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:28,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682255801] [2021-06-12 19:21:28,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682255801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342934359] [2021-06-12 19:21:28,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:29,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342934359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:29,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 19:21:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279876566] [2021-06-12 19:21:29,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:29,083 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:29,425 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2021-06-12 19:21:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:21:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:29,427 INFO L225 Difference]: With dead ends: 1269 [2021-06-12 19:21:29,427 INFO L226 Difference]: Without dead ends: 1260 [2021-06-12 19:21:29,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-12 19:21:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2021-06-12 19:21:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2021-06-12 19:21:29,436 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2021-06-12 19:21:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:29,436 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2021-06-12 19:21:29,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2021-06-12 19:21:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:29,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:29,437 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:29,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:29,638 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1088289653, now seen corresponding path program 117 times [2021-06-12 19:21:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:29,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798064459] [2021-06-12 19:21:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:29,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:29,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798064459] [2021-06-12 19:21:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798064459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525899285] [2021-06-12 19:21:29,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:29,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:29,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525899285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:29,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 19:21:29,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24782343] [2021-06-12 19:21:29,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:29,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:29,782 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:30,268 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2021-06-12 19:21:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 19:21:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:30,269 INFO L225 Difference]: With dead ends: 1150 [2021-06-12 19:21:30,269 INFO L226 Difference]: Without dead ends: 1144 [2021-06-12 19:21:30,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:21:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-12 19:21:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2021-06-12 19:21:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2021-06-12 19:21:30,278 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2021-06-12 19:21:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:30,278 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2021-06-12 19:21:30,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2021-06-12 19:21:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:30,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:30,279 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:30,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:30,480 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1121888881, now seen corresponding path program 118 times [2021-06-12 19:21:30,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:30,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606660186] [2021-06-12 19:21:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:30,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606660186] [2021-06-12 19:21:30,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606660186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596734424] [2021-06-12 19:21:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:30,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:30,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596734424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:30,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:30,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:21:30,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8569388] [2021-06-12 19:21:30,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:30,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:30,652 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:31,082 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2021-06-12 19:21:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:21:31,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:31,084 INFO L225 Difference]: With dead ends: 1155 [2021-06-12 19:21:31,084 INFO L226 Difference]: Without dead ends: 1147 [2021-06-12 19:21:31,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:21:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-12 19:21:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2021-06-12 19:21:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2021-06-12 19:21:31,093 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2021-06-12 19:21:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:31,093 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2021-06-12 19:21:31,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2021-06-12 19:21:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:31,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:31,094 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:31,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 19:21:31,295 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2131502347, now seen corresponding path program 119 times [2021-06-12 19:21:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:31,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702737227] [2021-06-12 19:21:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702737227] [2021-06-12 19:21:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702737227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706349688] [2021-06-12 19:21:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:31,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:31,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:31,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:31,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706349688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:31,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:21:31,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754787321] [2021-06-12 19:21:31,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:31,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:31,451 INFO L87 Difference]: Start difference. First operand 789 states and 2308 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:31,870 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-06-12 19:21:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:21:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:31,872 INFO L225 Difference]: With dead ends: 1081 [2021-06-12 19:21:31,872 INFO L226 Difference]: Without dead ends: 1069 [2021-06-12 19:21:31,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:21:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-12 19:21:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2021-06-12 19:21:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2021-06-12 19:21:31,881 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2021-06-12 19:21:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:31,881 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2021-06-12 19:21:31,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2021-06-12 19:21:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:31,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:31,882 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:32,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,083 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash 854005839, now seen corresponding path program 120 times [2021-06-12 19:21:32,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:32,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956743364] [2021-06-12 19:21:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:32,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956743364] [2021-06-12 19:21:32,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956743364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938823932] [2021-06-12 19:21:32,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938823932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:32,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 19:21:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877978344] [2021-06-12 19:21:32,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:32,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:32,240 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:32,580 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2021-06-12 19:21:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:21:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:32,582 INFO L225 Difference]: With dead ends: 1520 [2021-06-12 19:21:32,582 INFO L226 Difference]: Without dead ends: 1514 [2021-06-12 19:21:32,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-12 19:21:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2021-06-12 19:21:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2021-06-12 19:21:32,594 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2021-06-12 19:21:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:32,594 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2021-06-12 19:21:32,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2021-06-12 19:21:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:32,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:32,595 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:32,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 19:21:32,796 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 389414735, now seen corresponding path program 121 times [2021-06-12 19:21:32,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:32,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515082855] [2021-06-12 19:21:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:32,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515082855] [2021-06-12 19:21:32,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515082855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877374966] [2021-06-12 19:21:32,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877374966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:32,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 19:21:32,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233143866] [2021-06-12 19:21:32,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:32,932 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:33,465 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2021-06-12 19:21:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:21:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:33,466 INFO L225 Difference]: With dead ends: 1383 [2021-06-12 19:21:33,467 INFO L226 Difference]: Without dead ends: 1379 [2021-06-12 19:21:33,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 477.0ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 19:21:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-06-12 19:21:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2021-06-12 19:21:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2021-06-12 19:21:33,478 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2021-06-12 19:21:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:33,478 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2021-06-12 19:21:33,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2021-06-12 19:21:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:33,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:33,479 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:33,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 19:21:33,679 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash 355815507, now seen corresponding path program 122 times [2021-06-12 19:21:33,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:33,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666475536] [2021-06-12 19:21:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:33,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666475536] [2021-06-12 19:21:33,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666475536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177140313] [2021-06-12 19:21:33,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:33,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:33,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:33,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:33,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177140313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:33,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:33,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:21:33,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160278279] [2021-06-12 19:21:33,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:33,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:33,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:33,845 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:34,312 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2021-06-12 19:21:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 19:21:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:34,314 INFO L225 Difference]: With dead ends: 1412 [2021-06-12 19:21:34,314 INFO L226 Difference]: Without dead ends: 1404 [2021-06-12 19:21:34,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 19:21:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-12 19:21:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2021-06-12 19:21:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2021-06-12 19:21:34,326 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2021-06-12 19:21:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:34,326 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2021-06-12 19:21:34,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2021-06-12 19:21:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:34,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:34,327 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:34,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-12 19:21:34,527 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash -685760561, now seen corresponding path program 123 times [2021-06-12 19:21:34,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:34,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687945542] [2021-06-12 19:21:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:34,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687945542] [2021-06-12 19:21:34,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687945542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793949584] [2021-06-12 19:21:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:34,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:34,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793949584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:34,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:34,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:21:34,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910530348] [2021-06-12 19:21:34,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:34,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:34,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:34,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:34,705 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:35,154 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2021-06-12 19:21:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:21:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:35,156 INFO L225 Difference]: With dead ends: 1501 [2021-06-12 19:21:35,156 INFO L226 Difference]: Without dead ends: 1489 [2021-06-12 19:21:35,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:21:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-06-12 19:21:35,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2021-06-12 19:21:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2021-06-12 19:21:35,168 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2021-06-12 19:21:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:35,168 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2021-06-12 19:21:35,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2021-06-12 19:21:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:35,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:35,170 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:35,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:35,370 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1385119699, now seen corresponding path program 124 times [2021-06-12 19:21:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:35,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429985000] [2021-06-12 19:21:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:35,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:35,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429985000] [2021-06-12 19:21:35,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429985000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751853524] [2021-06-12 19:21:35,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:35,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751853524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:21:35,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694225511] [2021-06-12 19:21:35,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:35,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:35,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:35,552 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:35,967 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2021-06-12 19:21:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:21:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:35,969 INFO L225 Difference]: With dead ends: 1470 [2021-06-12 19:21:35,969 INFO L226 Difference]: Without dead ends: 1454 [2021-06-12 19:21:35,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:21:35,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-12 19:21:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2021-06-12 19:21:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2021-06-12 19:21:35,982 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2021-06-12 19:21:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:35,982 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2021-06-12 19:21:35,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2021-06-12 19:21:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:35,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:35,984 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:36,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-12 19:21:36,205 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash 693043539, now seen corresponding path program 125 times [2021-06-12 19:21:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:36,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542938370] [2021-06-12 19:21:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:36,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542938370] [2021-06-12 19:21:36,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542938370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468608837] [2021-06-12 19:21:36,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:36,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:36,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:36,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468608837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:36,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:21:36,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858941252] [2021-06-12 19:21:36,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:36,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:36,340 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:36,435 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2021-06-12 19:21:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:36,436 INFO L225 Difference]: With dead ends: 1462 [2021-06-12 19:21:36,436 INFO L226 Difference]: Without dead ends: 1462 [2021-06-12 19:21:36,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-12 19:21:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2021-06-12 19:21:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2021-06-12 19:21:36,449 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2021-06-12 19:21:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:36,449 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2021-06-12 19:21:36,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2021-06-12 19:21:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:36,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:36,450 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:36,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 19:21:36,651 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:36,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1067009401, now seen corresponding path program 126 times [2021-06-12 19:21:36,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:36,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683800502] [2021-06-12 19:21:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:36,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:36,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683800502] [2021-06-12 19:21:36,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683800502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845055863] [2021-06-12 19:21:36,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:36,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:36,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:36,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:36,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:36,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845055863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:36,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880914249] [2021-06-12 19:21:36,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:36,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:36,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:36,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:36,807 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:36,975 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2021-06-12 19:21:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:36,977 INFO L225 Difference]: With dead ends: 1324 [2021-06-12 19:21:36,977 INFO L226 Difference]: Without dead ends: 1324 [2021-06-12 19:21:36,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:21:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-12 19:21:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2021-06-12 19:21:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2021-06-12 19:21:36,995 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2021-06-12 19:21:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:36,995 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2021-06-12 19:21:36,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2021-06-12 19:21:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:36,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:36,997 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:37,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,220 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash -181211121, now seen corresponding path program 127 times [2021-06-12 19:21:37,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:37,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836354697] [2021-06-12 19:21:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:37,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836354697] [2021-06-12 19:21:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836354697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843305440] [2021-06-12 19:21:37,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:37,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843305440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:37,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:37,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518859477] [2021-06-12 19:21:37,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:37,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:37,413 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:37,644 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2021-06-12 19:21:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:21:37,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:37,646 INFO L225 Difference]: With dead ends: 1344 [2021-06-12 19:21:37,646 INFO L226 Difference]: Without dead ends: 1344 [2021-06-12 19:21:37,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:21:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-12 19:21:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2021-06-12 19:21:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2021-06-12 19:21:37,658 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2021-06-12 19:21:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:37,658 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2021-06-12 19:21:37,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2021-06-12 19:21:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:37,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:37,659 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:37,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,860 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:37,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1925572999, now seen corresponding path program 128 times [2021-06-12 19:21:37,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:37,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291766964] [2021-06-12 19:21:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:37,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:37,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291766964] [2021-06-12 19:21:37,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291766964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883716251] [2021-06-12 19:21:37,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:37,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883716251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:38,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:38,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873918756] [2021-06-12 19:21:38,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:38,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:38,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:38,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:38,001 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:38,340 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2021-06-12 19:21:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:21:38,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:38,341 INFO L225 Difference]: With dead ends: 1444 [2021-06-12 19:21:38,341 INFO L226 Difference]: Without dead ends: 1444 [2021-06-12 19:21:38,342 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-12 19:21:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2021-06-12 19:21:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2021-06-12 19:21:38,354 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2021-06-12 19:21:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:38,354 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2021-06-12 19:21:38,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2021-06-12 19:21:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:38,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:38,355 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:38,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:38,556 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:38,556 INFO L82 PathProgramCache]: Analyzing trace with hash -223223537, now seen corresponding path program 129 times [2021-06-12 19:21:38,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:38,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202165084] [2021-06-12 19:21:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:38,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:38,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202165084] [2021-06-12 19:21:38,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202165084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021294059] [2021-06-12 19:21:38,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:38,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:38,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:38,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021294059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:38,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:38,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570188320] [2021-06-12 19:21:38,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:38,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:38,741 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:39,140 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2021-06-12 19:21:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:21:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:39,143 INFO L225 Difference]: With dead ends: 1560 [2021-06-12 19:21:39,143 INFO L226 Difference]: Without dead ends: 1560 [2021-06-12 19:21:39,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:21:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-12 19:21:39,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2021-06-12 19:21:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2021-06-12 19:21:39,156 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2021-06-12 19:21:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:39,156 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2021-06-12 19:21:39,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2021-06-12 19:21:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:39,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:39,157 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:39,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-12 19:21:39,358 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash 348231269, now seen corresponding path program 130 times [2021-06-12 19:21:39,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:39,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041460910] [2021-06-12 19:21:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:39,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:39,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041460910] [2021-06-12 19:21:39,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041460910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:39,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276290320] [2021-06-12 19:21:39,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:39,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276290320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:39,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:39,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:39,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073444816] [2021-06-12 19:21:39,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:39,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:39,496 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:39,952 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2021-06-12 19:21:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:21:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:39,953 INFO L225 Difference]: With dead ends: 1402 [2021-06-12 19:21:39,953 INFO L226 Difference]: Without dead ends: 1396 [2021-06-12 19:21:39,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:21:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-12 19:21:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2021-06-12 19:21:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2021-06-12 19:21:39,965 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2021-06-12 19:21:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:39,965 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2021-06-12 19:21:39,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2021-06-12 19:21:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:39,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:39,967 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:40,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 19:21:40,167 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:40,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1583340277, now seen corresponding path program 131 times [2021-06-12 19:21:40,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:40,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860255662] [2021-06-12 19:21:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:40,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:40,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860255662] [2021-06-12 19:21:40,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860255662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:40,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893379829] [2021-06-12 19:21:40,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:40,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:40,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893379829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:40,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:40,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653997038] [2021-06-12 19:21:40,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:40,348 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:40,672 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2021-06-12 19:21:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:21:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:40,674 INFO L225 Difference]: With dead ends: 1746 [2021-06-12 19:21:40,674 INFO L226 Difference]: Without dead ends: 1737 [2021-06-12 19:21:40,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:21:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-12 19:21:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2021-06-12 19:21:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2021-06-12 19:21:40,698 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2021-06-12 19:21:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:40,698 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2021-06-12 19:21:40,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2021-06-12 19:21:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:40,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:40,700 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:40,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 19:21:40,913 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2047931381, now seen corresponding path program 132 times [2021-06-12 19:21:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:40,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521817736] [2021-06-12 19:21:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:40,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521817736] [2021-06-12 19:21:40,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521817736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440590218] [2021-06-12 19:21:40,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:40,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:41,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440590218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:41,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694201395] [2021-06-12 19:21:41,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:41,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:41,087 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:41,477 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2021-06-12 19:21:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:21:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:41,479 INFO L225 Difference]: With dead ends: 1701 [2021-06-12 19:21:41,479 INFO L226 Difference]: Without dead ends: 1697 [2021-06-12 19:21:41,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:21:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-06-12 19:21:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2021-06-12 19:21:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2021-06-12 19:21:41,495 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2021-06-12 19:21:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:41,495 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2021-06-12 19:21:41,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2021-06-12 19:21:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:41,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:41,497 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:41,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 19:21:41,697 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:41,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2081530609, now seen corresponding path program 133 times [2021-06-12 19:21:41,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:41,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415355817] [2021-06-12 19:21:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:41,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415355817] [2021-06-12 19:21:41,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415355817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530008106] [2021-06-12 19:21:41,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:41,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530008106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:41,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:41,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625445233] [2021-06-12 19:21:41,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:41,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:41,859 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:42,219 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2021-06-12 19:21:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:21:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:42,220 INFO L225 Difference]: With dead ends: 1682 [2021-06-12 19:21:42,221 INFO L226 Difference]: Without dead ends: 1674 [2021-06-12 19:21:42,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:21:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-12 19:21:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2021-06-12 19:21:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2021-06-12 19:21:42,235 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2021-06-12 19:21:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:42,235 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2021-06-12 19:21:42,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2021-06-12 19:21:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:42,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:42,236 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:42,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:42,437 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1171860619, now seen corresponding path program 134 times [2021-06-12 19:21:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931939370] [2021-06-12 19:21:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:42,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:42,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931939370] [2021-06-12 19:21:42,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931939370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:42,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361645362] [2021-06-12 19:21:42,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:42,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:42,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:42,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361645362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:42,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:42,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206441482] [2021-06-12 19:21:42,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:42,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:42,576 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:42,874 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2021-06-12 19:21:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:21:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:42,876 INFO L225 Difference]: With dead ends: 1724 [2021-06-12 19:21:42,876 INFO L226 Difference]: Without dead ends: 1712 [2021-06-12 19:21:42,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:21:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-12 19:21:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2021-06-12 19:21:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2021-06-12 19:21:42,897 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2021-06-12 19:21:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:42,897 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2021-06-12 19:21:42,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2021-06-12 19:21:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:42,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:42,899 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:43,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-12 19:21:43,099 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:43,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1052226417, now seen corresponding path program 135 times [2021-06-12 19:21:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:43,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481053564] [2021-06-12 19:21:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481053564] [2021-06-12 19:21:43,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481053564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135726321] [2021-06-12 19:21:43,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:43,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:21:43,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:43,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135726321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:43,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:21:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430188757] [2021-06-12 19:21:43,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:43,241 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:43,477 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2021-06-12 19:21:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:21:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:43,480 INFO L225 Difference]: With dead ends: 1567 [2021-06-12 19:21:43,480 INFO L226 Difference]: Without dead ends: 1559 [2021-06-12 19:21:43,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:21:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-12 19:21:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2021-06-12 19:21:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2021-06-12 19:21:43,500 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2021-06-12 19:21:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:43,500 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2021-06-12 19:21:43,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2021-06-12 19:21:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:43,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:43,502 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:43,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-12 19:21:43,724 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1727648907, now seen corresponding path program 136 times [2021-06-12 19:21:43,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:43,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323644898] [2021-06-12 19:21:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323644898] [2021-06-12 19:21:43,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323644898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873863433] [2021-06-12 19:21:43,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:43,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873863433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:43,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:21:43,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446725901] [2021-06-12 19:21:43,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:43,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:43,864 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:43,946 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2021-06-12 19:21:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:43,948 INFO L225 Difference]: With dead ends: 1464 [2021-06-12 19:21:43,948 INFO L226 Difference]: Without dead ends: 1454 [2021-06-12 19:21:43,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:21:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-12 19:21:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2021-06-12 19:21:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2021-06-12 19:21:43,961 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2021-06-12 19:21:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:43,961 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2021-06-12 19:21:43,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2021-06-12 19:21:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:43,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:43,962 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:44,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 19:21:44,163 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 205924307, now seen corresponding path program 137 times [2021-06-12 19:21:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:44,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181140561] [2021-06-12 19:21:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181140561] [2021-06-12 19:21:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181140561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58005482] [2021-06-12 19:21:44,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:44,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:44,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58005482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:21:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131864275] [2021-06-12 19:21:44,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:44,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:44,312 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:44,630 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2021-06-12 19:21:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:21:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:44,632 INFO L225 Difference]: With dead ends: 1488 [2021-06-12 19:21:44,632 INFO L226 Difference]: Without dead ends: 1488 [2021-06-12 19:21:44,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:21:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-12 19:21:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2021-06-12 19:21:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2021-06-12 19:21:44,645 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2021-06-12 19:21:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:44,645 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2021-06-12 19:21:44,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2021-06-12 19:21:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:44,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:44,647 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:44,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:44,848 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1513301805, now seen corresponding path program 138 times [2021-06-12 19:21:44,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:44,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838479367] [2021-06-12 19:21:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:44,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838479367] [2021-06-12 19:21:44,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838479367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109806929] [2021-06-12 19:21:44,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:44,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:44,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:44,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:44,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109806929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:44,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 19:21:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808067646] [2021-06-12 19:21:44,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:44,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:44,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:44,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:44,983 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:45,260 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2021-06-12 19:21:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:21:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:45,262 INFO L225 Difference]: With dead ends: 1578 [2021-06-12 19:21:45,262 INFO L226 Difference]: Without dead ends: 1572 [2021-06-12 19:21:45,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:21:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-12 19:21:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2021-06-12 19:21:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2021-06-12 19:21:45,286 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2021-06-12 19:21:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:45,286 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2021-06-12 19:21:45,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2021-06-12 19:21:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:45,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:45,288 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:45,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:45,490 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1479280595, now seen corresponding path program 139 times [2021-06-12 19:21:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:45,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301189514] [2021-06-12 19:21:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:45,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:45,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301189514] [2021-06-12 19:21:45,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301189514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:45,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428884557] [2021-06-12 19:21:45,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428884557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:45,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:45,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 19:21:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294341805] [2021-06-12 19:21:45,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:45,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:45,624 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:45,893 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2021-06-12 19:21:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:21:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:45,895 INFO L225 Difference]: With dead ends: 1610 [2021-06-12 19:21:45,895 INFO L226 Difference]: Without dead ends: 1606 [2021-06-12 19:21:45,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:21:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-06-12 19:21:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2021-06-12 19:21:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2021-06-12 19:21:45,908 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2021-06-12 19:21:45,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:45,908 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2021-06-12 19:21:45,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2021-06-12 19:21:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:45,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:45,909 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:46,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-12 19:21:46,110 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1437268179, now seen corresponding path program 140 times [2021-06-12 19:21:46,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:46,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649883688] [2021-06-12 19:21:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:46,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649883688] [2021-06-12 19:21:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649883688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914191639] [2021-06-12 19:21:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:46,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:46,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:46,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:46,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914191639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:46,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 19:21:46,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120543780] [2021-06-12 19:21:46,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:46,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:46,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:46,251 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:46,604 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2021-06-12 19:21:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:21:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:46,606 INFO L225 Difference]: With dead ends: 1777 [2021-06-12 19:21:46,606 INFO L226 Difference]: Without dead ends: 1777 [2021-06-12 19:21:46,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:21:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-12 19:21:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2021-06-12 19:21:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2021-06-12 19:21:46,621 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2021-06-12 19:21:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:46,621 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2021-06-12 19:21:46,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2021-06-12 19:21:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:46,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:46,622 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:46,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-12 19:21:46,838 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2008722985, now seen corresponding path program 141 times [2021-06-12 19:21:46,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:46,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613602173] [2021-06-12 19:21:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:46,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:46,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613602173] [2021-06-12 19:21:46,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613602173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788101939] [2021-06-12 19:21:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:46,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:21:46,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:46,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788101939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:46,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-12 19:21:46,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887710647] [2021-06-12 19:21:46,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:46,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:46,988 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:47,405 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2021-06-12 19:21:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:21:47,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:47,407 INFO L225 Difference]: With dead ends: 1692 [2021-06-12 19:21:47,407 INFO L226 Difference]: Without dead ends: 1683 [2021-06-12 19:21:47,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:21:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-06-12 19:21:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2021-06-12 19:21:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2021-06-12 19:21:47,423 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2021-06-12 19:21:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:47,423 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2021-06-12 19:21:47,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2021-06-12 19:21:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:47,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:47,425 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:47,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 19:21:47,641 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1751014509, now seen corresponding path program 142 times [2021-06-12 19:21:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:47,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355550899] [2021-06-12 19:21:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:47,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355550899] [2021-06-12 19:21:47,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355550899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191160099] [2021-06-12 19:21:47,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:47,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:47,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:47,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191160099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:47,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:21:47,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126172617] [2021-06-12 19:21:47,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:47,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:47,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:47,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:47,808 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:48,228 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2021-06-12 19:21:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:21:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:48,230 INFO L225 Difference]: With dead ends: 1586 [2021-06-12 19:21:48,230 INFO L226 Difference]: Without dead ends: 1574 [2021-06-12 19:21:48,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 369.5ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:21:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-06-12 19:21:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2021-06-12 19:21:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2021-06-12 19:21:48,257 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2021-06-12 19:21:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:48,257 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2021-06-12 19:21:48,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2021-06-12 19:21:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:48,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:48,259 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:48,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 19:21:48,459 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:48,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1012163591, now seen corresponding path program 143 times [2021-06-12 19:21:48,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:48,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642085408] [2021-06-12 19:21:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:48,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:48,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642085408] [2021-06-12 19:21:48,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642085408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:48,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206123382] [2021-06-12 19:21:48,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:48,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:48,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206123382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:48,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:48,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:21:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229049290] [2021-06-12 19:21:48,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:48,652 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:49,009 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2021-06-12 19:21:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:21:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:49,011 INFO L225 Difference]: With dead ends: 1481 [2021-06-12 19:21:49,011 INFO L226 Difference]: Without dead ends: 1481 [2021-06-12 19:21:49,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:21:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-12 19:21:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2021-06-12 19:21:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2021-06-12 19:21:49,040 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2021-06-12 19:21:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:49,040 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2021-06-12 19:21:49,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2021-06-12 19:21:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:49,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:49,041 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:49,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 19:21:49,242 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash 141559951, now seen corresponding path program 144 times [2021-06-12 19:21:49,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:49,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981740905] [2021-06-12 19:21:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:49,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:49,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981740905] [2021-06-12 19:21:49,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981740905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:49,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194739651] [2021-06-12 19:21:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:49,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:49,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:49,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:49,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194739651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:49,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:49,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:21:49,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215039809] [2021-06-12 19:21:49,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:49,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:49,411 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:49,717 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2021-06-12 19:21:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:21:49,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:49,719 INFO L225 Difference]: With dead ends: 1620 [2021-06-12 19:21:49,719 INFO L226 Difference]: Without dead ends: 1614 [2021-06-12 19:21:49,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:21:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-12 19:21:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2021-06-12 19:21:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2021-06-12 19:21:49,733 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2021-06-12 19:21:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:49,733 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2021-06-12 19:21:49,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2021-06-12 19:21:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:49,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:49,734 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:49,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:49,935 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash 529117959, now seen corresponding path program 145 times [2021-06-12 19:21:49,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:49,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021773725] [2021-06-12 19:21:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:49,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:49,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021773725] [2021-06-12 19:21:49,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021773725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:49,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249016066] [2021-06-12 19:21:49,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:50,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:50,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:50,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249016066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:50,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 19:21:50,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618692763] [2021-06-12 19:21:50,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:50,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:50,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:50,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:50,083 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:50,375 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2021-06-12 19:21:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:21:50,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:50,378 INFO L225 Difference]: With dead ends: 1830 [2021-06-12 19:21:50,378 INFO L226 Difference]: Without dead ends: 1828 [2021-06-12 19:21:50,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:21:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-12 19:21:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2021-06-12 19:21:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2021-06-12 19:21:50,392 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2021-06-12 19:21:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:50,393 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2021-06-12 19:21:50,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2021-06-12 19:21:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:50,394 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:50,394 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:50,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-12 19:21:50,595 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1372903823, now seen corresponding path program 146 times [2021-06-12 19:21:50,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:50,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140733898] [2021-06-12 19:21:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:50,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140733898] [2021-06-12 19:21:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140733898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029141635] [2021-06-12 19:21:50,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:50,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:50,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:50,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:50,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029141635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:50,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 19:21:50,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043213512] [2021-06-12 19:21:50,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:50,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:50,782 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:51,183 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2021-06-12 19:21:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:21:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:51,185 INFO L225 Difference]: With dead ends: 1888 [2021-06-12 19:21:51,186 INFO L226 Difference]: Without dead ends: 1888 [2021-06-12 19:21:51,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-12 19:21:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2021-06-12 19:21:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2021-06-12 19:21:51,209 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2021-06-12 19:21:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:51,209 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2021-06-12 19:21:51,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2021-06-12 19:21:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:51,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:51,211 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:51,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-12 19:21:51,434 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1944358629, now seen corresponding path program 147 times [2021-06-12 19:21:51,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:51,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035693308] [2021-06-12 19:21:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:51,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035693308] [2021-06-12 19:21:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035693308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990277858] [2021-06-12 19:21:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:51,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:51,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:51,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990277858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:51,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:51,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-12 19:21:51,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851509267] [2021-06-12 19:21:51,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:51,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:51,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:51,600 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:52,109 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2021-06-12 19:21:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 19:21:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:52,111 INFO L225 Difference]: With dead ends: 1840 [2021-06-12 19:21:52,112 INFO L226 Difference]: Without dead ends: 1831 [2021-06-12 19:21:52,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:21:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-12 19:21:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2021-06-12 19:21:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2021-06-12 19:21:52,127 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2021-06-12 19:21:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:52,127 INFO L482 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2021-06-12 19:21:52,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2021-06-12 19:21:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:52,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:52,129 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:52,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:52,349 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1815378865, now seen corresponding path program 148 times [2021-06-12 19:21:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:52,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005528506] [2021-06-12 19:21:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:52,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005528506] [2021-06-12 19:21:52,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005528506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217104821] [2021-06-12 19:21:52,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:52,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:52,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:52,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217104821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:52,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:21:52,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015431211] [2021-06-12 19:21:52,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:52,522 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:52,959 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2021-06-12 19:21:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:21:52,959 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:52,961 INFO L225 Difference]: With dead ends: 1834 [2021-06-12 19:21:52,961 INFO L226 Difference]: Without dead ends: 1822 [2021-06-12 19:21:52,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:21:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-12 19:21:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2021-06-12 19:21:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2021-06-12 19:21:52,979 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2021-06-12 19:21:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:52,979 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2021-06-12 19:21:52,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2021-06-12 19:21:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:52,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:52,981 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:53,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:53,203 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1891843109, now seen corresponding path program 149 times [2021-06-12 19:21:53,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:53,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051370788] [2021-06-12 19:21:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:53,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:53,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051370788] [2021-06-12 19:21:53,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051370788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:53,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241693051] [2021-06-12 19:21:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:53,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:21:53,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:53,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241693051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:53,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:53,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:21:53,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396664072] [2021-06-12 19:21:53,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:53,375 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:53,775 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2021-06-12 19:21:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:21:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:53,777 INFO L225 Difference]: With dead ends: 1747 [2021-06-12 19:21:53,777 INFO L226 Difference]: Without dead ends: 1729 [2021-06-12 19:21:53,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:21:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-12 19:21:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2021-06-12 19:21:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2021-06-12 19:21:53,793 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2021-06-12 19:21:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:53,793 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2021-06-12 19:21:53,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2021-06-12 19:21:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:53,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:53,794 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:53,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:53,995 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash 235777619, now seen corresponding path program 150 times [2021-06-12 19:21:53,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:53,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109576404] [2021-06-12 19:21:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109576404] [2021-06-12 19:21:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109576404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893186122] [2021-06-12 19:21:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:21:54,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:54,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893186122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:54,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:21:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337047337] [2021-06-12 19:21:54,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:54,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:54,197 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:54,586 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2021-06-12 19:21:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:21:54,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:54,588 INFO L225 Difference]: With dead ends: 1698 [2021-06-12 19:21:54,589 INFO L226 Difference]: Without dead ends: 1698 [2021-06-12 19:21:54,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 19:21:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-12 19:21:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2021-06-12 19:21:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2021-06-12 19:21:54,602 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2021-06-12 19:21:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:54,603 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2021-06-12 19:21:54,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2021-06-12 19:21:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:54,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:54,605 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:54,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,821 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash -97333165, now seen corresponding path program 151 times [2021-06-12 19:21:54,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:54,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678796062] [2021-06-12 19:21:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:54,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:54,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678796062] [2021-06-12 19:21:54,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678796062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636532008] [2021-06-12 19:21:54,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636532008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:54,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:21:54,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397052417] [2021-06-12 19:21:54,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:54,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:54,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:54,978 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:55,330 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2021-06-12 19:21:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:21:55,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:55,332 INFO L225 Difference]: With dead ends: 1946 [2021-06-12 19:21:55,332 INFO L226 Difference]: Without dead ends: 1946 [2021-06-12 19:21:55,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:21:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-06-12 19:21:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2021-06-12 19:21:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2021-06-12 19:21:55,348 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2021-06-12 19:21:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:55,348 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2021-06-12 19:21:55,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2021-06-12 19:21:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:55,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:55,350 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:55,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-12 19:21:55,572 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1138847315, now seen corresponding path program 152 times [2021-06-12 19:21:55,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:55,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003571726] [2021-06-12 19:21:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:55,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:55,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003571726] [2021-06-12 19:21:55,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003571726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:55,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520984572] [2021-06-12 19:21:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:55,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:55,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:55,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520984572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:55,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:55,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:21:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174032123] [2021-06-12 19:21:55,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:55,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:55,717 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:56,043 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2021-06-12 19:21:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:21:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:56,045 INFO L225 Difference]: With dead ends: 2146 [2021-06-12 19:21:56,045 INFO L226 Difference]: Without dead ends: 2146 [2021-06-12 19:21:56,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-06-12 19:21:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2021-06-12 19:21:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2021-06-12 19:21:56,071 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2021-06-12 19:21:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:56,071 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2021-06-12 19:21:56,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2021-06-12 19:21:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:56,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:56,073 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:56,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:56,274 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash -622391213, now seen corresponding path program 153 times [2021-06-12 19:21:56,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:56,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601233462] [2021-06-12 19:21:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:56,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:56,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601233462] [2021-06-12 19:21:56,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601233462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333360878] [2021-06-12 19:21:56,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:56,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:21:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:56,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333360878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:56,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 19:21:56,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588551020] [2021-06-12 19:21:56,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:56,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:56,413 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:56,740 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2021-06-12 19:21:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:21:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:56,743 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 19:21:56,743 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 19:21:56,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 19:21:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2021-06-12 19:21:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2021-06-12 19:21:56,766 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2021-06-12 19:21:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:56,766 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2021-06-12 19:21:56,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2021-06-12 19:21:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:56,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:56,768 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:56,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 19:21:56,969 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash -50936407, now seen corresponding path program 154 times [2021-06-12 19:21:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:56,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686398600] [2021-06-12 19:21:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:56,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:56,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686398600] [2021-06-12 19:21:56,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686398600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262806511] [2021-06-12 19:21:56,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:57,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:57,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:57,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262806511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:57,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:57,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-12 19:21:57,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569955668] [2021-06-12 19:21:57,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:57,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:57,118 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:57,665 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2021-06-12 19:21:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:21:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:57,668 INFO L225 Difference]: With dead ends: 2413 [2021-06-12 19:21:57,668 INFO L226 Difference]: Without dead ends: 2407 [2021-06-12 19:21:57,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 19:21:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-12 19:21:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2021-06-12 19:21:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2021-06-12 19:21:57,702 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2021-06-12 19:21:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:57,702 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2021-06-12 19:21:57,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2021-06-12 19:21:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:57,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:57,704 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 19:21:57,904 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 484293395, now seen corresponding path program 155 times [2021-06-12 19:21:57,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:57,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564707286] [2021-06-12 19:21:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:57,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:57,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564707286] [2021-06-12 19:21:57,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564707286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:57,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451716860] [2021-06-12 19:21:57,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:57,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:21:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:58,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451716860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:58,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:21:58,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165973673] [2021-06-12 19:21:58,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:58,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:58,056 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:58,537 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2021-06-12 19:21:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 19:21:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:58,539 INFO L225 Difference]: With dead ends: 2435 [2021-06-12 19:21:58,539 INFO L226 Difference]: Without dead ends: 2423 [2021-06-12 19:21:58,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 19:21:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-12 19:21:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2021-06-12 19:21:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2021-06-12 19:21:58,571 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2021-06-12 19:21:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:58,571 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2021-06-12 19:21:58,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2021-06-12 19:21:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:58,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:58,573 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:58,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-12 19:21:58,774 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:58,774 INFO L82 PathProgramCache]: Analyzing trace with hash -103451927, now seen corresponding path program 156 times [2021-06-12 19:21:58,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:58,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913635373] [2021-06-12 19:21:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:58,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913635373] [2021-06-12 19:21:58,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913635373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215986072] [2021-06-12 19:21:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:58,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:21:58,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:58,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215986072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:58,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:21:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176753009] [2021-06-12 19:21:58,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:58,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:58,947 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:59,427 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2021-06-12 19:21:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:21:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:21:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:59,430 INFO L225 Difference]: With dead ends: 2515 [2021-06-12 19:21:59,430 INFO L226 Difference]: Without dead ends: 2497 [2021-06-12 19:21:59,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:21:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-12 19:21:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2021-06-12 19:21:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2021-06-12 19:21:59,453 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2021-06-12 19:21:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:59,453 INFO L482 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2021-06-12 19:21:59,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2021-06-12 19:21:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:21:59,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:59,455 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:59,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:59,656 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:59,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1143687725, now seen corresponding path program 157 times [2021-06-12 19:21:59,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:59,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747449183] [2021-06-12 19:21:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:59,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:59,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747449183] [2021-06-12 19:21:59,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747449183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:59,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319323961] [2021-06-12 19:21:59,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:59,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:21:59,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:59,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319323961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:59,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:59,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:21:59,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4131901] [2021-06-12 19:21:59,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:59,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:59,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:59,845 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:00,263 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2021-06-12 19:22:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:22:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 19:22:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:00,266 INFO L225 Difference]: With dead ends: 2460 [2021-06-12 19:22:00,266 INFO L226 Difference]: Without dead ends: 2436 [2021-06-12 19:22:00,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:22:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-12 19:22:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2021-06-12 19:22:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2021-06-12 19:22:00,288 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2021-06-12 19:22:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:00,288 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2021-06-12 19:22:00,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2021-06-12 19:22:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:00,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:00,290 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:00,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-12 19:22:00,491 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:00,491 INFO L82 PathProgramCache]: Analyzing trace with hash -950598133, now seen corresponding path program 158 times [2021-06-12 19:22:00,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:00,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143360747] [2021-06-12 19:22:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:00,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143360747] [2021-06-12 19:22:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143360747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214922234] [2021-06-12 19:22:00,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:00,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:00,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:00,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214922234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:00,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:00,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887963250] [2021-06-12 19:22:00,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:00,826 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:01,237 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2021-06-12 19:22:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:22:01,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:01,240 INFO L225 Difference]: With dead ends: 2290 [2021-06-12 19:22:01,240 INFO L226 Difference]: Without dead ends: 2264 [2021-06-12 19:22:01,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-12 19:22:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2021-06-12 19:22:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2021-06-12 19:22:01,263 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2021-06-12 19:22:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:01,263 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2021-06-12 19:22:01,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2021-06-12 19:22:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:01,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:01,265 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:01,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:01,469 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2035301631, now seen corresponding path program 159 times [2021-06-12 19:22:01,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:01,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288835944] [2021-06-12 19:22:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:01,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288835944] [2021-06-12 19:22:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288835944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035602632] [2021-06-12 19:22:01,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:01,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:01,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035602632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:01,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747036496] [2021-06-12 19:22:01,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:01,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:01,771 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:01,978 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2021-06-12 19:22:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:01,982 INFO L225 Difference]: With dead ends: 2347 [2021-06-12 19:22:01,982 INFO L226 Difference]: Without dead ends: 2340 [2021-06-12 19:22:01,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-12 19:22:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2021-06-12 19:22:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2021-06-12 19:22:02,014 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2021-06-12 19:22:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:02,015 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2021-06-12 19:22:02,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2021-06-12 19:22:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:02,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:02,017 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:02,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:02,233 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -644962941, now seen corresponding path program 160 times [2021-06-12 19:22:02,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:02,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088022863] [2021-06-12 19:22:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:02,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:02,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088022863] [2021-06-12 19:22:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088022863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815317830] [2021-06-12 19:22:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:02,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:02,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:02,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:02,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815317830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:02,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:02,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:02,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971676114] [2021-06-12 19:22:02,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:02,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:02,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:02,477 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:02,724 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2021-06-12 19:22:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:02,727 INFO L225 Difference]: With dead ends: 2333 [2021-06-12 19:22:02,727 INFO L226 Difference]: Without dead ends: 2317 [2021-06-12 19:22:02,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-12 19:22:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-06-12 19:22:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-12 19:22:02,749 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-12 19:22:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:02,749 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-12 19:22:02,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-12 19:22:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:02,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:02,751 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-12 19:22:02,952 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1688210859, now seen corresponding path program 161 times [2021-06-12 19:22:02,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:02,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866749183] [2021-06-12 19:22:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:03,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866749183] [2021-06-12 19:22:03,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866749183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310836394] [2021-06-12 19:22:03,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:03,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:22:03,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310836394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:03,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:03,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040119317] [2021-06-12 19:22:03,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:03,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:03,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:03,260 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:03,506 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2021-06-12 19:22:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:03,509 INFO L225 Difference]: With dead ends: 2307 [2021-06-12 19:22:03,509 INFO L226 Difference]: Without dead ends: 2300 [2021-06-12 19:22:03,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-12 19:22:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2021-06-12 19:22:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-12 19:22:03,532 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-12 19:22:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:03,532 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-12 19:22:03,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-12 19:22:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:03,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:03,534 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:03,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:03,735 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1152981057, now seen corresponding path program 162 times [2021-06-12 19:22:03,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:03,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67151038] [2021-06-12 19:22:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:03,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67151038] [2021-06-12 19:22:03,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67151038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757561784] [2021-06-12 19:22:03,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:03,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:22:03,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:04,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757561784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:04,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:04,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369677117] [2021-06-12 19:22:04,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:04,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:04,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:04,021 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:04,285 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2021-06-12 19:22:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:04,287 INFO L225 Difference]: With dead ends: 2324 [2021-06-12 19:22:04,287 INFO L226 Difference]: Without dead ends: 2317 [2021-06-12 19:22:04,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-12 19:22:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-06-12 19:22:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-12 19:22:04,309 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-12 19:22:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:04,309 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-12 19:22:04,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-12 19:22:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:04,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:04,311 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:04,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:04,512 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1740726379, now seen corresponding path program 163 times [2021-06-12 19:22:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:04,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116307181] [2021-06-12 19:22:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:04,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:04,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116307181] [2021-06-12 19:22:04,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116307181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25402258] [2021-06-12 19:22:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:04,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:04,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25402258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:04,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129624488] [2021-06-12 19:22:04,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:04,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:04,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:04,824 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:05,169 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2021-06-12 19:22:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:05,172 INFO L225 Difference]: With dead ends: 2260 [2021-06-12 19:22:05,172 INFO L226 Difference]: Without dead ends: 2253 [2021-06-12 19:22:05,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-12 19:22:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2021-06-12 19:22:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-06-12 19:22:05,197 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-06-12 19:22:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:05,198 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-06-12 19:22:05,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-06-12 19:22:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:05,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:05,199 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:05,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-12 19:22:05,400 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash -922738373, now seen corresponding path program 164 times [2021-06-12 19:22:05,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:05,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378853401] [2021-06-12 19:22:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:05,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:05,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378853401] [2021-06-12 19:22:05,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378853401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160768373] [2021-06-12 19:22:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:05,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:05,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160768373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:05,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068031854] [2021-06-12 19:22:05,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:05,718 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:05,916 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2021-06-12 19:22:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:22:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:05,919 INFO L225 Difference]: With dead ends: 2270 [2021-06-12 19:22:05,919 INFO L226 Difference]: Without dead ends: 2263 [2021-06-12 19:22:05,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-12 19:22:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2021-06-12 19:22:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2021-06-12 19:22:05,944 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2021-06-12 19:22:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:05,944 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2021-06-12 19:22:05,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2021-06-12 19:22:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:05,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:05,947 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 19:22:06,164 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash 691964351, now seen corresponding path program 165 times [2021-06-12 19:22:06,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:06,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973320558] [2021-06-12 19:22:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:06,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:06,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973320558] [2021-06-12 19:22:06,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973320558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:06,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227930200] [2021-06-12 19:22:06,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:06,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:06,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:06,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227930200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:06,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:06,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:06,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538015156] [2021-06-12 19:22:06,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:06,453 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:06,667 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2021-06-12 19:22:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:06,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:06,670 INFO L225 Difference]: With dead ends: 2271 [2021-06-12 19:22:06,670 INFO L226 Difference]: Without dead ends: 2262 [2021-06-12 19:22:06,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-12 19:22:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2021-06-12 19:22:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-06-12 19:22:06,692 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-06-12 19:22:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:06,692 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-06-12 19:22:06,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-06-12 19:22:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:06,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:06,695 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:06,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-12 19:22:06,897 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1387329477, now seen corresponding path program 166 times [2021-06-12 19:22:06,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:06,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523116712] [2021-06-12 19:22:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:07,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:07,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523116712] [2021-06-12 19:22:07,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523116712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79324903] [2021-06-12 19:22:07,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:07,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:07,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79324903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:07,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:07,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487828057] [2021-06-12 19:22:07,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:07,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:07,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:07,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:07,175 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:07,362 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2021-06-12 19:22:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:07,365 INFO L225 Difference]: With dead ends: 2235 [2021-06-12 19:22:07,365 INFO L226 Difference]: Without dead ends: 2228 [2021-06-12 19:22:07,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-12 19:22:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2021-06-12 19:22:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-06-12 19:22:07,386 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-06-12 19:22:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:07,386 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-06-12 19:22:07,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-06-12 19:22:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:07,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:07,388 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:07,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:07,589 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1867302015, now seen corresponding path program 167 times [2021-06-12 19:22:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:07,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850369047] [2021-06-12 19:22:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:07,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850369047] [2021-06-12 19:22:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850369047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146812014] [2021-06-12 19:22:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:07,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:22:07,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:07,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:07,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146812014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:07,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 19:22:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458465212] [2021-06-12 19:22:07,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:07,922 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:08,190 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2021-06-12 19:22:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:08,193 INFO L225 Difference]: With dead ends: 2462 [2021-06-12 19:22:08,193 INFO L226 Difference]: Without dead ends: 2445 [2021-06-12 19:22:08,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-12 19:22:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2021-06-12 19:22:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2021-06-12 19:22:08,219 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2021-06-12 19:22:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:08,219 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2021-06-12 19:22:08,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2021-06-12 19:22:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:08,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:08,221 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:08,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-12 19:22:08,422 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:08,422 INFO L82 PathProgramCache]: Analyzing trace with hash -812962557, now seen corresponding path program 168 times [2021-06-12 19:22:08,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:08,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406196336] [2021-06-12 19:22:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:08,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406196336] [2021-06-12 19:22:08,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406196336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507251056] [2021-06-12 19:22:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:08,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:22:08,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:08,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:08,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507251056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:08,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:08,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 19:22:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432720862] [2021-06-12 19:22:08,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:08,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:08,717 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:08,925 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2021-06-12 19:22:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:08,929 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 19:22:08,929 INFO L226 Difference]: Without dead ends: 2446 [2021-06-12 19:22:08,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-12 19:22:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2021-06-12 19:22:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2021-06-12 19:22:08,963 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2021-06-12 19:22:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:08,963 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2021-06-12 19:22:08,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2021-06-12 19:22:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:08,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:08,965 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:09,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:09,165 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1402710911, now seen corresponding path program 169 times [2021-06-12 19:22:09,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:09,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965163914] [2021-06-12 19:22:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:09,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:09,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965163914] [2021-06-12 19:22:09,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965163914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:09,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944352141] [2021-06-12 19:22:09,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:09,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:09,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944352141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:09,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:09,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 19:22:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032850295] [2021-06-12 19:22:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:09,425 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:09,693 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2021-06-12 19:22:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:09,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:09,697 INFO L225 Difference]: With dead ends: 2405 [2021-06-12 19:22:09,697 INFO L226 Difference]: Without dead ends: 2383 [2021-06-12 19:22:09,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-12 19:22:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2021-06-12 19:22:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-06-12 19:22:09,719 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-06-12 19:22:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:09,719 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-06-12 19:22:09,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-06-12 19:22:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:09,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:09,721 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:09,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:09,922 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1369111683, now seen corresponding path program 170 times [2021-06-12 19:22:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:09,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389743742] [2021-06-12 19:22:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:10,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:10,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389743742] [2021-06-12 19:22:10,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389743742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360196271] [2021-06-12 19:22:10,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:10,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:10,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:10,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:10,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360196271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:10,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 19:22:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886625210] [2021-06-12 19:22:10,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:10,236 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:10,456 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2021-06-12 19:22:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:10,460 INFO L225 Difference]: With dead ends: 2338 [2021-06-12 19:22:10,460 INFO L226 Difference]: Without dead ends: 2331 [2021-06-12 19:22:10,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-12 19:22:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2021-06-12 19:22:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-06-12 19:22:10,489 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-06-12 19:22:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:10,489 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-06-12 19:22:10,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-06-12 19:22:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:10,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:10,492 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:10,705 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1898222891, now seen corresponding path program 171 times [2021-06-12 19:22:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:10,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968669519] [2021-06-12 19:22:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:10,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:10,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968669519] [2021-06-12 19:22:10,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968669519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650872122] [2021-06-12 19:22:10,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:10,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650872122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494377065] [2021-06-12 19:22:10,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:10,955 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:11,128 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2021-06-12 19:22:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:22:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:11,131 INFO L225 Difference]: With dead ends: 2327 [2021-06-12 19:22:11,131 INFO L226 Difference]: Without dead ends: 2314 [2021-06-12 19:22:11,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-12 19:22:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2021-06-12 19:22:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2021-06-12 19:22:11,153 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2021-06-12 19:22:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:11,154 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2021-06-12 19:22:11,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2021-06-12 19:22:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:11,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:11,156 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:11,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-12 19:22:11,356 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1835759173, now seen corresponding path program 172 times [2021-06-12 19:22:11,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:11,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887397635] [2021-06-12 19:22:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:11,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887397635] [2021-06-12 19:22:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887397635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712408611] [2021-06-12 19:22:11,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:11,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:11,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:11,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712408611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:11,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:11,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:11,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214370224] [2021-06-12 19:22:11,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:11,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:11,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:11,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:11,711 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:11,997 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2021-06-12 19:22:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:12,001 INFO L225 Difference]: With dead ends: 2518 [2021-06-12 19:22:12,001 INFO L226 Difference]: Without dead ends: 2501 [2021-06-12 19:22:12,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-12 19:22:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2021-06-12 19:22:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2021-06-12 19:22:12,029 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2021-06-12 19:22:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:12,029 INFO L482 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2021-06-12 19:22:12,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2021-06-12 19:22:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:12,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:12,031 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:12,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 19:22:12,241 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash -221056449, now seen corresponding path program 173 times [2021-06-12 19:22:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:12,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171214378] [2021-06-12 19:22:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171214378] [2021-06-12 19:22:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171214378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107166161] [2021-06-12 19:22:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:12,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:12,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:12,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107166161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:12,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:12,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243296743] [2021-06-12 19:22:12,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:12,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:12,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:12,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:12,540 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:12,801 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2021-06-12 19:22:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:12,804 INFO L225 Difference]: With dead ends: 2516 [2021-06-12 19:22:12,804 INFO L226 Difference]: Without dead ends: 2498 [2021-06-12 19:22:12,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-12 19:22:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2021-06-12 19:22:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2021-06-12 19:22:12,828 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2021-06-12 19:22:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:12,828 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2021-06-12 19:22:12,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2021-06-12 19:22:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:12,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:12,830 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:13,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:13,031 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:13,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1994617019, now seen corresponding path program 174 times [2021-06-12 19:22:13,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:13,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187040474] [2021-06-12 19:22:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:13,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:13,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187040474] [2021-06-12 19:22:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187040474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047485887] [2021-06-12 19:22:13,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:13,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:13,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:13,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047485887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:13,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242713290] [2021-06-12 19:22:13,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:13,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:13,325 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:13,599 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2021-06-12 19:22:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:13,601 INFO L225 Difference]: With dead ends: 2507 [2021-06-12 19:22:13,601 INFO L226 Difference]: Without dead ends: 2485 [2021-06-12 19:22:13,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-12 19:22:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2021-06-12 19:22:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2021-06-12 19:22:13,627 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2021-06-12 19:22:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:13,627 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2021-06-12 19:22:13,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2021-06-12 19:22:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:13,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:13,629 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:13,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-12 19:22:13,829 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1961017791, now seen corresponding path program 175 times [2021-06-12 19:22:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:13,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564079215] [2021-06-12 19:22:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:13,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:13,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564079215] [2021-06-12 19:22:13,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564079215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141422315] [2021-06-12 19:22:13,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141422315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:14,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:14,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624085407] [2021-06-12 19:22:14,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:14,073 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:14,409 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2021-06-12 19:22:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:14,412 INFO L225 Difference]: With dead ends: 2454 [2021-06-12 19:22:14,412 INFO L226 Difference]: Without dead ends: 2428 [2021-06-12 19:22:14,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-12 19:22:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2021-06-12 19:22:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2021-06-12 19:22:14,440 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2021-06-12 19:22:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:14,440 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2021-06-12 19:22:14,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2021-06-12 19:22:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:14,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:14,442 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:14,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-12 19:22:14,643 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 919441723, now seen corresponding path program 176 times [2021-06-12 19:22:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:14,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888749254] [2021-06-12 19:22:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:14,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888749254] [2021-06-12 19:22:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888749254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427751182] [2021-06-12 19:22:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:14,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:14,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:14,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427751182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:14,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:14,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143022969] [2021-06-12 19:22:14,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:14,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:14,887 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:15,175 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2021-06-12 19:22:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:15,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:15,178 INFO L225 Difference]: With dead ends: 2375 [2021-06-12 19:22:15,178 INFO L226 Difference]: Without dead ends: 2368 [2021-06-12 19:22:15,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-12 19:22:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2021-06-12 19:22:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2021-06-12 19:22:15,201 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2021-06-12 19:22:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:15,201 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2021-06-12 19:22:15,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2021-06-12 19:22:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:15,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:15,203 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:15,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:15,404 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash -420518503, now seen corresponding path program 177 times [2021-06-12 19:22:15,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:15,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604560456] [2021-06-12 19:22:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:15,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604560456] [2021-06-12 19:22:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604560456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864876623] [2021-06-12 19:22:15,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:15,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:22:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:15,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864876623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582714733] [2021-06-12 19:22:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:15,676 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:15,877 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2021-06-12 19:22:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:22:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:15,880 INFO L225 Difference]: With dead ends: 2298 [2021-06-12 19:22:15,881 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 19:22:15,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 19:22:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2021-06-12 19:22:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2021-06-12 19:22:15,904 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2021-06-12 19:22:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:15,904 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2021-06-12 19:22:15,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2021-06-12 19:22:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:15,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:15,906 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:16,109 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash -666539009, now seen corresponding path program 178 times [2021-06-12 19:22:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:16,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229539126] [2021-06-12 19:22:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:16,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229539126] [2021-06-12 19:22:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229539126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350155480] [2021-06-12 19:22:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:16,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:16,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350155480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:16,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:16,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119529537] [2021-06-12 19:22:16,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:16,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:16,363 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:16,629 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2021-06-12 19:22:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:16,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:16,640 INFO L225 Difference]: With dead ends: 2566 [2021-06-12 19:22:16,640 INFO L226 Difference]: Without dead ends: 2549 [2021-06-12 19:22:16,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-12 19:22:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2021-06-12 19:22:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2021-06-12 19:22:16,665 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2021-06-12 19:22:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:16,665 INFO L482 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2021-06-12 19:22:16,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2021-06-12 19:22:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:16,668 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:16,668 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:16,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:16,877 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 948163715, now seen corresponding path program 179 times [2021-06-12 19:22:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:16,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163865381] [2021-06-12 19:22:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:16,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:16,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163865381] [2021-06-12 19:22:16,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163865381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227816991] [2021-06-12 19:22:16,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:17,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227816991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:17,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:17,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047095850] [2021-06-12 19:22:17,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:17,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:17,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:17,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:17,109 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:17,351 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2021-06-12 19:22:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:17,354 INFO L225 Difference]: With dead ends: 2564 [2021-06-12 19:22:17,354 INFO L226 Difference]: Without dead ends: 2548 [2021-06-12 19:22:17,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-12 19:22:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2021-06-12 19:22:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2021-06-12 19:22:17,379 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2021-06-12 19:22:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:17,379 INFO L482 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2021-06-12 19:22:17,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2021-06-12 19:22:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:17,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:17,381 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:17,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-12 19:22:17,582 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:17,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1131130113, now seen corresponding path program 180 times [2021-06-12 19:22:17,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:17,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501987227] [2021-06-12 19:22:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:17,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501987227] [2021-06-12 19:22:17,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501987227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475283007] [2021-06-12 19:22:17,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:17,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:22:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:17,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475283007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:17,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:17,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380391127] [2021-06-12 19:22:17,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:17,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:17,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:17,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:17,897 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:18,195 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2021-06-12 19:22:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:18,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:18,199 INFO L225 Difference]: With dead ends: 2571 [2021-06-12 19:22:18,199 INFO L226 Difference]: Without dead ends: 2553 [2021-06-12 19:22:18,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-12 19:22:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2021-06-12 19:22:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2021-06-12 19:22:18,224 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2021-06-12 19:22:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:18,224 INFO L482 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2021-06-12 19:22:18,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2021-06-12 19:22:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:18,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:18,227 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:18,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-12 19:22:18,427 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1164729341, now seen corresponding path program 181 times [2021-06-12 19:22:18,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:18,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957134949] [2021-06-12 19:22:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:18,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:18,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957134949] [2021-06-12 19:22:18,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957134949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:18,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204831048] [2021-06-12 19:22:18,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:18,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204831048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:18,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:18,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:18,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886950340] [2021-06-12 19:22:18,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:18,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:18,685 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:18,983 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2021-06-12 19:22:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:18,987 INFO L225 Difference]: With dead ends: 2576 [2021-06-12 19:22:18,987 INFO L226 Difference]: Without dead ends: 2556 [2021-06-12 19:22:18,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-12 19:22:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2021-06-12 19:22:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2021-06-12 19:22:19,013 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2021-06-12 19:22:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:19,013 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2021-06-12 19:22:19,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2021-06-12 19:22:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:19,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:19,015 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:19,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-12 19:22:19,216 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2088661887, now seen corresponding path program 182 times [2021-06-12 19:22:19,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:19,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969288196] [2021-06-12 19:22:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:19,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:19,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969288196] [2021-06-12 19:22:19,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969288196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:19,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882315432] [2021-06-12 19:22:19,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:19,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:19,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:19,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:19,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:19,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882315432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:19,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:19,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:19,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394493885] [2021-06-12 19:22:19,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:19,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:19,460 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:19,811 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2021-06-12 19:22:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:22:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:19,814 INFO L225 Difference]: With dead ends: 2488 [2021-06-12 19:22:19,815 INFO L226 Difference]: Without dead ends: 2466 [2021-06-12 19:22:19,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-12 19:22:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2021-06-12 19:22:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2021-06-12 19:22:19,839 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2021-06-12 19:22:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:19,839 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2021-06-12 19:22:19,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2021-06-12 19:22:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:19,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:19,841 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:20,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 19:22:20,042 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash -135425149, now seen corresponding path program 183 times [2021-06-12 19:22:20,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:20,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678201563] [2021-06-12 19:22:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:20,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678201563] [2021-06-12 19:22:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678201563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850315303] [2021-06-12 19:22:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:20,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:22:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:20,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850315303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:20,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:20,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42826991] [2021-06-12 19:22:20,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:20,325 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:20,653 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2021-06-12 19:22:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:20,657 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 19:22:20,657 INFO L226 Difference]: Without dead ends: 2401 [2021-06-12 19:22:20,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-12 19:22:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2021-06-12 19:22:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2021-06-12 19:22:20,681 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2021-06-12 19:22:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:20,681 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2021-06-12 19:22:20,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2021-06-12 19:22:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:20,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:20,683 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:20,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:20,884 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1867189759, now seen corresponding path program 184 times [2021-06-12 19:22:20,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:20,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207246094] [2021-06-12 19:22:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:20,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:20,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207246094] [2021-06-12 19:22:20,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207246094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:20,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666534113] [2021-06-12 19:22:20,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:21,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666534113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:21,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866868017] [2021-06-12 19:22:21,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:21,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:21,146 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:21,335 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2021-06-12 19:22:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:21,338 INFO L225 Difference]: With dead ends: 2482 [2021-06-12 19:22:21,338 INFO L226 Difference]: Without dead ends: 2472 [2021-06-12 19:22:21,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-12 19:22:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2021-06-12 19:22:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2021-06-12 19:22:21,363 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2021-06-12 19:22:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:21,363 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2021-06-12 19:22:21,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2021-06-12 19:22:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:21,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:21,365 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:21,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:21,565 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -813074813, now seen corresponding path program 185 times [2021-06-12 19:22:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:21,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893409239] [2021-06-12 19:22:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:21,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893409239] [2021-06-12 19:22:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893409239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762670094] [2021-06-12 19:22:21,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:21,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:22:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:21,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:21,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762670094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:21,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:21,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772597964] [2021-06-12 19:22:21,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:21,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:21,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:21,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:21,861 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:22,044 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2021-06-12 19:22:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:22:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:22,047 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 19:22:22,047 INFO L226 Difference]: Without dead ends: 2457 [2021-06-12 19:22:22,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-12 19:22:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2021-06-12 19:22:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2021-06-12 19:22:22,072 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2021-06-12 19:22:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:22,072 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2021-06-12 19:22:22,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2021-06-12 19:22:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:22,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:22,074 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:22,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:22,275 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1856322731, now seen corresponding path program 186 times [2021-06-12 19:22:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:22,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984937015] [2021-06-12 19:22:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:22,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:22,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984937015] [2021-06-12 19:22:22,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984937015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475948277] [2021-06-12 19:22:22,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:22,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:22:22,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:22,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475948277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:22,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-06-12 19:22:22,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630680138] [2021-06-12 19:22:22,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:22,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:22,533 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:22,694 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2021-06-12 19:22:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:22,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:22,697 INFO L225 Difference]: With dead ends: 2417 [2021-06-12 19:22:22,697 INFO L226 Difference]: Without dead ends: 2410 [2021-06-12 19:22:22,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-12 19:22:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2021-06-12 19:22:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2021-06-12 19:22:22,722 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2021-06-12 19:22:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:22,722 INFO L482 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2021-06-12 19:22:22,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2021-06-12 19:22:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:22,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:22,724 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:22,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 19:22:22,924 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1191597057, now seen corresponding path program 187 times [2021-06-12 19:22:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845830440] [2021-06-12 19:22:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:23,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:23,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845830440] [2021-06-12 19:22:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845830440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008996807] [2021-06-12 19:22:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008996807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:23,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 19:22:23,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191607738] [2021-06-12 19:22:23,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:23,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:23,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:23,179 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:23,368 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2021-06-12 19:22:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:23,371 INFO L225 Difference]: With dead ends: 2563 [2021-06-12 19:22:23,371 INFO L226 Difference]: Without dead ends: 2553 [2021-06-12 19:22:23,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-12 19:22:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2021-06-12 19:22:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2021-06-12 19:22:23,397 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2021-06-12 19:22:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:23,397 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2021-06-12 19:22:23,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2021-06-12 19:22:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:23,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:23,399 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:23,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-12 19:22:23,600 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash 423105667, now seen corresponding path program 188 times [2021-06-12 19:22:23,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:23,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880180928] [2021-06-12 19:22:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:23,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:23,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880180928] [2021-06-12 19:22:23,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880180928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871242519] [2021-06-12 19:22:23,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:23,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871242519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:23,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 19:22:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070193576] [2021-06-12 19:22:23,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:23,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:23,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:23,877 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:24,084 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2021-06-12 19:22:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:24,087 INFO L225 Difference]: With dead ends: 2544 [2021-06-12 19:22:24,087 INFO L226 Difference]: Without dead ends: 2537 [2021-06-12 19:22:24,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-12 19:22:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2021-06-12 19:22:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2021-06-12 19:22:24,111 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2021-06-12 19:22:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:24,111 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2021-06-12 19:22:24,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2021-06-12 19:22:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:24,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:24,114 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:24,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:24,314 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:24,315 INFO L82 PathProgramCache]: Analyzing trace with hash -620142251, now seen corresponding path program 189 times [2021-06-12 19:22:24,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:24,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334643002] [2021-06-12 19:22:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:24,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:24,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334643002] [2021-06-12 19:22:24,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334643002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:24,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673849286] [2021-06-12 19:22:24,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:24,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:24,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:24,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673849286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:24,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:24,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 19:22:24,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161866707] [2021-06-12 19:22:24,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:24,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:24,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:24,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:24,551 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:24,770 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2021-06-12 19:22:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:24,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:24,772 INFO L225 Difference]: With dead ends: 2523 [2021-06-12 19:22:24,773 INFO L226 Difference]: Without dead ends: 2510 [2021-06-12 19:22:24,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-06-12 19:22:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2021-06-12 19:22:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2021-06-12 19:22:24,797 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2021-06-12 19:22:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:24,797 INFO L482 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2021-06-12 19:22:24,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2021-06-12 19:22:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:24,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:24,799 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:24,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-12 19:22:24,999 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:25,000 INFO L82 PathProgramCache]: Analyzing trace with hash -84912449, now seen corresponding path program 190 times [2021-06-12 19:22:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:25,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045803976] [2021-06-12 19:22:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:25,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:25,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045803976] [2021-06-12 19:22:25,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045803976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295320090] [2021-06-12 19:22:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:25,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:25,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:25,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295320090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:25,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 19:22:25,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997537482] [2021-06-12 19:22:25,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:25,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:25,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:25,259 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:25,505 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2021-06-12 19:22:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:25,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:25,509 INFO L225 Difference]: With dead ends: 2467 [2021-06-12 19:22:25,509 INFO L226 Difference]: Without dead ends: 2460 [2021-06-12 19:22:25,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-12 19:22:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2021-06-12 19:22:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2021-06-12 19:22:25,535 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2021-06-12 19:22:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:25,535 INFO L482 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2021-06-12 19:22:25,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2021-06-12 19:22:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:25,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:25,537 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:25,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,738 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1303821513, now seen corresponding path program 191 times [2021-06-12 19:22:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:25,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191859688] [2021-06-12 19:22:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:25,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191859688] [2021-06-12 19:22:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191859688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753190475] [2021-06-12 19:22:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753190475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:26,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 19:22:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99100811] [2021-06-12 19:22:26,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:26,017 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:26,230 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2021-06-12 19:22:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:22:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:26,232 INFO L225 Difference]: With dead ends: 2438 [2021-06-12 19:22:26,233 INFO L226 Difference]: Without dead ends: 2422 [2021-06-12 19:22:26,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-12 19:22:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2021-06-12 19:22:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2021-06-12 19:22:26,256 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2021-06-12 19:22:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:26,256 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2021-06-12 19:22:26,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2021-06-12 19:22:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:26,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:26,258 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:26,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:26,459 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1524707841, now seen corresponding path program 192 times [2021-06-12 19:22:26,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:26,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674371441] [2021-06-12 19:22:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:26,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674371441] [2021-06-12 19:22:26,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674371441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426205992] [2021-06-12 19:22:26,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:26,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:26,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426205992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:26,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:26,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955799529] [2021-06-12 19:22:26,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:26,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:26,692 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:26,885 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2021-06-12 19:22:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:26,888 INFO L225 Difference]: With dead ends: 2637 [2021-06-12 19:22:26,888 INFO L226 Difference]: Without dead ends: 2627 [2021-06-12 19:22:26,889 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-06-12 19:22:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2021-06-12 19:22:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2021-06-12 19:22:26,914 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2021-06-12 19:22:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:26,914 INFO L482 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2021-06-12 19:22:26,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2021-06-12 19:22:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:26,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:26,916 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:27,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:27,117 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash 89994883, now seen corresponding path program 193 times [2021-06-12 19:22:27,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:27,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840990143] [2021-06-12 19:22:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:27,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840990143] [2021-06-12 19:22:27,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840990143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198013101] [2021-06-12 19:22:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:27,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198013101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:27,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:27,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592882359] [2021-06-12 19:22:27,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:27,363 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:27,556 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2021-06-12 19:22:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:27,559 INFO L225 Difference]: With dead ends: 2621 [2021-06-12 19:22:27,559 INFO L226 Difference]: Without dead ends: 2614 [2021-06-12 19:22:27,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-12 19:22:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2021-06-12 19:22:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2021-06-12 19:22:27,595 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2021-06-12 19:22:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:27,595 INFO L482 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2021-06-12 19:22:27,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2021-06-12 19:22:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:27,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:27,597 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:27,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 19:22:27,798 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash -953253035, now seen corresponding path program 194 times [2021-06-12 19:22:27,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:27,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327737350] [2021-06-12 19:22:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:27,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:27,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327737350] [2021-06-12 19:22:27,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327737350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:27,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930009243] [2021-06-12 19:22:27,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:27,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:28,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930009243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:28,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405455692] [2021-06-12 19:22:28,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:28,025 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:28,238 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2021-06-12 19:22:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:28,242 INFO L225 Difference]: With dead ends: 2635 [2021-06-12 19:22:28,242 INFO L226 Difference]: Without dead ends: 2622 [2021-06-12 19:22:28,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-12 19:22:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2021-06-12 19:22:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2021-06-12 19:22:28,269 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2021-06-12 19:22:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:28,269 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2021-06-12 19:22:28,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2021-06-12 19:22:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:28,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:28,271 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:28,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-12 19:22:28,471 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:28,472 INFO L82 PathProgramCache]: Analyzing trace with hash -418023233, now seen corresponding path program 195 times [2021-06-12 19:22:28,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:28,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310857653] [2021-06-12 19:22:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:28,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:28,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310857653] [2021-06-12 19:22:28,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310857653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239505750] [2021-06-12 19:22:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:28,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:28,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:28,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:28,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:28,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239505750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:28,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:28,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729801232] [2021-06-12 19:22:28,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:28,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:28,708 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:28,948 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2021-06-12 19:22:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:28,951 INFO L225 Difference]: With dead ends: 2598 [2021-06-12 19:22:28,952 INFO L226 Difference]: Without dead ends: 2582 [2021-06-12 19:22:28,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-12 19:22:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2021-06-12 19:22:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2021-06-12 19:22:28,992 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2021-06-12 19:22:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:28,992 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2021-06-12 19:22:28,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2021-06-12 19:22:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:22:28,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:28,994 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:29,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:29,195 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:29,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1005768555, now seen corresponding path program 196 times [2021-06-12 19:22:29,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:29,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179901315] [2021-06-12 19:22:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:29,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:29,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179901315] [2021-06-12 19:22:29,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179901315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080227298] [2021-06-12 19:22:29,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:29,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:22:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:29,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080227298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:29,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 19:22:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957910573] [2021-06-12 19:22:29,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:29,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:29,430 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:29,690 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2021-06-12 19:22:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:29,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 19:22:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:29,694 INFO L225 Difference]: With dead ends: 2537 [2021-06-12 19:22:29,694 INFO L226 Difference]: Without dead ends: 2530 [2021-06-12 19:22:29,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-12 19:22:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2021-06-12 19:22:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2021-06-12 19:22:29,719 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2021-06-12 19:22:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:29,719 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2021-06-12 19:22:29,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2021-06-12 19:22:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:29,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:29,721 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:29,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 19:22:29,922 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:29,922 INFO L82 PathProgramCache]: Analyzing trace with hash 622856203, now seen corresponding path program 197 times [2021-06-12 19:22:29,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:29,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004859401] [2021-06-12 19:22:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:29,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004859401] [2021-06-12 19:22:29,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004859401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439707380] [2021-06-12 19:22:29,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:30,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439707380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:30,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:30,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 19:22:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330656460] [2021-06-12 19:22:30,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:30,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:30,100 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:30,231 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2021-06-12 19:22:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:22:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:30,235 INFO L225 Difference]: With dead ends: 3357 [2021-06-12 19:22:30,235 INFO L226 Difference]: Without dead ends: 3337 [2021-06-12 19:22:30,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:22:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-06-12 19:22:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2021-06-12 19:22:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2021-06-12 19:22:30,263 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2021-06-12 19:22:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:30,264 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2021-06-12 19:22:30,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2021-06-12 19:22:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:30,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:30,266 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:30,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-12 19:22:30,466 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1555322853, now seen corresponding path program 198 times [2021-06-12 19:22:30,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:30,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103977080] [2021-06-12 19:22:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:30,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:30,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103977080] [2021-06-12 19:22:30,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103977080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:30,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382791156] [2021-06-12 19:22:30,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:30,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:30,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:30,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382791156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:30,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:30,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 19:22:30,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506312855] [2021-06-12 19:22:30,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:30,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:30,647 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:30,780 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2021-06-12 19:22:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:30,783 INFO L225 Difference]: With dead ends: 3420 [2021-06-12 19:22:30,783 INFO L226 Difference]: Without dead ends: 3420 [2021-06-12 19:22:30,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-06-12 19:22:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2021-06-12 19:22:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2021-06-12 19:22:30,812 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2021-06-12 19:22:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:30,812 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2021-06-12 19:22:30,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2021-06-12 19:22:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:30,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:30,815 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:31,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-12 19:22:31,015 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash -167346353, now seen corresponding path program 199 times [2021-06-12 19:22:31,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:31,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502795380] [2021-06-12 19:22:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:31,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:31,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502795380] [2021-06-12 19:22:31,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502795380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:31,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417434907] [2021-06-12 19:22:31,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:31,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:31,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417434907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:31,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:31,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:31,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877401101] [2021-06-12 19:22:31,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:31,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:31,195 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:31,722 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2021-06-12 19:22:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:22:31,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:31,726 INFO L225 Difference]: With dead ends: 4110 [2021-06-12 19:22:31,727 INFO L226 Difference]: Without dead ends: 4102 [2021-06-12 19:22:31,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:22:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-12 19:22:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2021-06-12 19:22:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2021-06-12 19:22:31,784 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2021-06-12 19:22:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:31,784 INFO L482 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2021-06-12 19:22:31,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2021-06-12 19:22:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:31,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:31,787 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:31,988 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 404108453, now seen corresponding path program 200 times [2021-06-12 19:22:31,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:31,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002720225] [2021-06-12 19:22:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:32,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:32,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002720225] [2021-06-12 19:22:32,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002720225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:32,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554267676] [2021-06-12 19:22:32,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:32,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:32,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:32,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554267676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:32,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:32,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:32,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878002706] [2021-06-12 19:22:32,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:32,212 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:32,755 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2021-06-12 19:22:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 19:22:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:32,760 INFO L225 Difference]: With dead ends: 4077 [2021-06-12 19:22:32,760 INFO L226 Difference]: Without dead ends: 4071 [2021-06-12 19:22:32,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 19:22:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-06-12 19:22:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2021-06-12 19:22:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2021-06-12 19:22:32,798 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2021-06-12 19:22:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:32,798 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2021-06-12 19:22:32,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2021-06-12 19:22:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:32,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:32,800 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:33,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:33,001 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1527463093, now seen corresponding path program 201 times [2021-06-12 19:22:33,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:33,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674665979] [2021-06-12 19:22:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:33,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:33,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674665979] [2021-06-12 19:22:33,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674665979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428404624] [2021-06-12 19:22:33,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:33,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:33,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:33,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428404624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:33,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:33,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587538506] [2021-06-12 19:22:33,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:33,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:33,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:33,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:33,182 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:33,808 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2021-06-12 19:22:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:22:33,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:33,812 INFO L225 Difference]: With dead ends: 3589 [2021-06-12 19:22:33,812 INFO L226 Difference]: Without dead ends: 3589 [2021-06-12 19:22:33,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 19:22:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-06-12 19:22:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2021-06-12 19:22:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2021-06-12 19:22:33,846 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2021-06-12 19:22:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:33,846 INFO L482 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2021-06-12 19:22:33,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2021-06-12 19:22:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:33,849 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:33,849 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:34,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:34,049 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1992054197, now seen corresponding path program 202 times [2021-06-12 19:22:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:34,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799139554] [2021-06-12 19:22:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:34,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:34,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799139554] [2021-06-12 19:22:34,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799139554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:34,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340857343] [2021-06-12 19:22:34,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:34,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:34,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340857343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:34,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:34,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122056687] [2021-06-12 19:22:34,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:34,232 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:34,858 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2021-06-12 19:22:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:22:34,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:34,861 INFO L225 Difference]: With dead ends: 3314 [2021-06-12 19:22:34,861 INFO L226 Difference]: Without dead ends: 3310 [2021-06-12 19:22:34,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 19:22:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-12 19:22:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2021-06-12 19:22:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2021-06-12 19:22:34,890 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2021-06-12 19:22:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:34,890 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2021-06-12 19:22:34,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2021-06-12 19:22:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:34,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:34,893 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:35,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:35,093 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 939338255, now seen corresponding path program 203 times [2021-06-12 19:22:35,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:35,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433585111] [2021-06-12 19:22:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:35,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433585111] [2021-06-12 19:22:35,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433585111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394104411] [2021-06-12 19:22:35,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:35,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:22:35,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:35,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394104411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:35,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:35,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724056506] [2021-06-12 19:22:35,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:35,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:35,304 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:35,828 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2021-06-12 19:22:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:22:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:35,832 INFO L225 Difference]: With dead ends: 3834 [2021-06-12 19:22:35,832 INFO L226 Difference]: Without dead ends: 3825 [2021-06-12 19:22:35,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:22:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-06-12 19:22:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2021-06-12 19:22:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2021-06-12 19:22:35,864 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2021-06-12 19:22:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:35,864 INFO L482 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2021-06-12 19:22:35,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2021-06-12 19:22:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:35,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:35,867 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:36,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-12 19:22:36,067 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:36,067 INFO L82 PathProgramCache]: Analyzing trace with hash 351592933, now seen corresponding path program 204 times [2021-06-12 19:22:36,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:36,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947235540] [2021-06-12 19:22:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:36,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:36,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947235540] [2021-06-12 19:22:36,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947235540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299212308] [2021-06-12 19:22:36,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:36,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:22:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:36,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299212308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:36,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:36,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295968653] [2021-06-12 19:22:36,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:36,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:36,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:36,269 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:36,821 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2021-06-12 19:22:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:22:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:36,825 INFO L225 Difference]: With dead ends: 3887 [2021-06-12 19:22:36,825 INFO L226 Difference]: Without dead ends: 3875 [2021-06-12 19:22:36,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:22:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-12 19:22:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2021-06-12 19:22:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2021-06-12 19:22:36,858 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2021-06-12 19:22:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:36,858 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2021-06-12 19:22:36,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2021-06-12 19:22:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:36,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:36,861 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:37,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:37,061 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash -688642865, now seen corresponding path program 205 times [2021-06-12 19:22:37,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:37,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101763181] [2021-06-12 19:22:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:37,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:37,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101763181] [2021-06-12 19:22:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101763181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110478409] [2021-06-12 19:22:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:37,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110478409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:37,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:37,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:37,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142456435] [2021-06-12 19:22:37,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:37,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:37,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:37,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:37,253 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:37,759 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2021-06-12 19:22:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:22:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:37,763 INFO L225 Difference]: With dead ends: 3976 [2021-06-12 19:22:37,763 INFO L226 Difference]: Without dead ends: 3961 [2021-06-12 19:22:37,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:22:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-06-12 19:22:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2021-06-12 19:22:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2021-06-12 19:22:37,798 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2021-06-12 19:22:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:37,798 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2021-06-12 19:22:37,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2021-06-12 19:22:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:37,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:37,800 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:38,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 19:22:38,001 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1423785765, now seen corresponding path program 206 times [2021-06-12 19:22:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:38,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991274473] [2021-06-12 19:22:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:38,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:38,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991274473] [2021-06-12 19:22:38,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991274473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807125147] [2021-06-12 19:22:38,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:38,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:38,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:38,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807125147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758505619] [2021-06-12 19:22:38,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:38,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:38,217 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:38,535 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2021-06-12 19:22:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:22:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:38,539 INFO L225 Difference]: With dead ends: 3613 [2021-06-12 19:22:38,539 INFO L226 Difference]: Without dead ends: 3598 [2021-06-12 19:22:38,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:22:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-06-12 19:22:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2021-06-12 19:22:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2021-06-12 19:22:38,574 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2021-06-12 19:22:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:38,574 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2021-06-12 19:22:38,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2021-06-12 19:22:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:38,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:38,577 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:38,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-12 19:22:38,778 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1262577295, now seen corresponding path program 207 times [2021-06-12 19:22:38,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:38,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094055557] [2021-06-12 19:22:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:38,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:38,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094055557] [2021-06-12 19:22:38,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094055557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408714999] [2021-06-12 19:22:38,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:38,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:22:38,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:38,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408714999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:38,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:22:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145359975] [2021-06-12 19:22:38,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:38,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:38,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:38,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:38,959 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:39,549 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2021-06-12 19:22:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:22:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:39,553 INFO L225 Difference]: With dead ends: 3520 [2021-06-12 19:22:39,553 INFO L226 Difference]: Without dead ends: 3511 [2021-06-12 19:22:39,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:22:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-12 19:22:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2021-06-12 19:22:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2021-06-12 19:22:39,585 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2021-06-12 19:22:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:39,585 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2021-06-12 19:22:39,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2021-06-12 19:22:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:39,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:39,588 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:39,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:39,788 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash 797986191, now seen corresponding path program 208 times [2021-06-12 19:22:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:39,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854898429] [2021-06-12 19:22:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:39,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:39,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854898429] [2021-06-12 19:22:39,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854898429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:39,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939828973] [2021-06-12 19:22:39,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:39,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:39,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:39,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939828973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:39,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:39,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:22:39,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043503440] [2021-06-12 19:22:39,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:39,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:39,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:39,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:39,976 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:40,662 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2021-06-12 19:22:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 19:22:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:40,665 INFO L225 Difference]: With dead ends: 3291 [2021-06-12 19:22:40,665 INFO L226 Difference]: Without dead ends: 3283 [2021-06-12 19:22:40,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 594.2ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 19:22:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-12 19:22:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2021-06-12 19:22:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2021-06-12 19:22:40,697 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2021-06-12 19:22:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:40,697 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2021-06-12 19:22:40,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2021-06-12 19:22:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:40,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:40,699 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:40,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 19:22:40,900 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:40,900 INFO L82 PathProgramCache]: Analyzing trace with hash 764386963, now seen corresponding path program 209 times [2021-06-12 19:22:40,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:40,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451129749] [2021-06-12 19:22:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:40,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:40,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451129749] [2021-06-12 19:22:40,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451129749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:40,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017380725] [2021-06-12 19:22:40,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:40,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:22:40,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:41,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017380725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:41,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:41,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:22:41,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219920289] [2021-06-12 19:22:41,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:41,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:41,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:41,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:41,097 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:41,710 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2021-06-12 19:22:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:22:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:41,713 INFO L225 Difference]: With dead ends: 2975 [2021-06-12 19:22:41,714 INFO L226 Difference]: Without dead ends: 2967 [2021-06-12 19:22:41,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:22:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-12 19:22:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2021-06-12 19:22:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2021-06-12 19:22:41,755 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2021-06-12 19:22:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:41,755 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2021-06-12 19:22:41,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2021-06-12 19:22:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:41,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:41,757 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:41,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:41,958 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1854483403, now seen corresponding path program 210 times [2021-06-12 19:22:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:41,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384498152] [2021-06-12 19:22:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:42,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:42,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384498152] [2021-06-12 19:22:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384498152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833725837] [2021-06-12 19:22:42,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:22:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:42,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:42,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:42,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833725837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:42,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 19:22:42,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958978754] [2021-06-12 19:22:42,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:42,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:42,127 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:42,674 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2021-06-12 19:22:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 19:22:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:42,678 INFO L225 Difference]: With dead ends: 3590 [2021-06-12 19:22:42,678 INFO L226 Difference]: Without dead ends: 3575 [2021-06-12 19:22:42,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 19:22:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-06-12 19:22:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2021-06-12 19:22:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2021-06-12 19:22:42,713 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2021-06-12 19:22:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:42,714 INFO L482 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2021-06-12 19:22:42,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2021-06-12 19:22:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:42,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:42,716 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:42,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,917 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1389892299, now seen corresponding path program 211 times [2021-06-12 19:22:42,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:42,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050072370] [2021-06-12 19:22:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:42,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050072370] [2021-06-12 19:22:42,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050072370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554414977] [2021-06-12 19:22:42,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:43,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554414977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:43,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:43,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 19:22:43,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699515194] [2021-06-12 19:22:43,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:43,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:43,087 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:43,793 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2021-06-12 19:22:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:22:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:43,797 INFO L225 Difference]: With dead ends: 3290 [2021-06-12 19:22:43,797 INFO L226 Difference]: Without dead ends: 3284 [2021-06-12 19:22:43,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:22:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-06-12 19:22:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2021-06-12 19:22:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2021-06-12 19:22:43,828 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2021-06-12 19:22:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:43,828 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2021-06-12 19:22:43,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2021-06-12 19:22:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:43,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:43,830 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:44,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:44,031 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1356293071, now seen corresponding path program 212 times [2021-06-12 19:22:44,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:44,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098189869] [2021-06-12 19:22:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:44,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:44,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098189869] [2021-06-12 19:22:44,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098189869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406531682] [2021-06-12 19:22:44,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:44,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:44,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:44,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406531682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:44,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 19:22:44,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606203142] [2021-06-12 19:22:44,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:44,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:44,225 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:44,909 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2021-06-12 19:22:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 19:22:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:44,912 INFO L225 Difference]: With dead ends: 3240 [2021-06-12 19:22:44,912 INFO L226 Difference]: Without dead ends: 3228 [2021-06-12 19:22:44,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:22:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-12 19:22:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2021-06-12 19:22:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2021-06-12 19:22:44,942 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2021-06-12 19:22:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:44,942 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2021-06-12 19:22:44,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2021-06-12 19:22:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:44,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:44,944 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:45,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:45,145 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash 314717003, now seen corresponding path program 213 times [2021-06-12 19:22:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:45,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055533845] [2021-06-12 19:22:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:45,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:45,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055533845] [2021-06-12 19:22:45,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055533845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327614901] [2021-06-12 19:22:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:45,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:45,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:45,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:45,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327614901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:45,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 19:22:45,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334994706] [2021-06-12 19:22:45,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:22:45,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:22:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:45,337 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:45,954 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2021-06-12 19:22:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 19:22:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:45,957 INFO L225 Difference]: With dead ends: 3083 [2021-06-12 19:22:45,957 INFO L226 Difference]: Without dead ends: 3071 [2021-06-12 19:22:45,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 576.0ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:22:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-12 19:22:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2021-06-12 19:22:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2021-06-12 19:22:45,986 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2021-06-12 19:22:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:45,986 INFO L482 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2021-06-12 19:22:45,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2021-06-12 19:22:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:45,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:45,989 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:46,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:46,189 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1271263729, now seen corresponding path program 214 times [2021-06-12 19:22:46,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:46,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518566652] [2021-06-12 19:22:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:46,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518566652] [2021-06-12 19:22:46,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518566652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663001415] [2021-06-12 19:22:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:46,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:46,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:46,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663001415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:46,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:46,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 19:22:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395482265] [2021-06-12 19:22:46,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:46,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:46,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:46,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:46,358 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:46,893 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2021-06-12 19:22:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:22:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:46,897 INFO L225 Difference]: With dead ends: 3813 [2021-06-12 19:22:46,897 INFO L226 Difference]: Without dead ends: 3801 [2021-06-12 19:22:46,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:22:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-12 19:22:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2021-06-12 19:22:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2021-06-12 19:22:46,931 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2021-06-12 19:22:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:46,931 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2021-06-12 19:22:46,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2021-06-12 19:22:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:46,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:46,934 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:47,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:47,134 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1735854833, now seen corresponding path program 215 times [2021-06-12 19:22:47,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:47,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227202596] [2021-06-12 19:22:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:47,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227202596] [2021-06-12 19:22:47,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227202596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750552933] [2021-06-12 19:22:47,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:47,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:22:47,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750552933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:47,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 19:22:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453205018] [2021-06-12 19:22:47,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:47,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:47,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:47,324 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:48,097 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2021-06-12 19:22:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 19:22:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:48,100 INFO L225 Difference]: With dead ends: 3570 [2021-06-12 19:22:48,101 INFO L226 Difference]: Without dead ends: 3564 [2021-06-12 19:22:48,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 698.5ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 19:22:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-12 19:22:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2021-06-12 19:22:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2021-06-12 19:22:48,135 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2021-06-12 19:22:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:48,135 INFO L482 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2021-06-12 19:22:48,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2021-06-12 19:22:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:48,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:48,137 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:48,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-06-12 19:22:48,338 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1769454061, now seen corresponding path program 216 times [2021-06-12 19:22:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:48,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148791851] [2021-06-12 19:22:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:48,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:48,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148791851] [2021-06-12 19:22:48,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148791851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811850071] [2021-06-12 19:22:48,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:48,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:22:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:48,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811850071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:48,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 19:22:48,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114154873] [2021-06-12 19:22:48,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:48,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:48,520 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:49,290 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2021-06-12 19:22:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:22:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:49,293 INFO L225 Difference]: With dead ends: 3572 [2021-06-12 19:22:49,293 INFO L226 Difference]: Without dead ends: 3564 [2021-06-12 19:22:49,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:22:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-12 19:22:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2021-06-12 19:22:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2021-06-12 19:22:49,328 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2021-06-12 19:22:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:49,328 INFO L482 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2021-06-12 19:22:49,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2021-06-12 19:22:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:49,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:49,330 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:49,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-12 19:22:49,531 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1483937167, now seen corresponding path program 217 times [2021-06-12 19:22:49,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:49,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158680494] [2021-06-12 19:22:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:49,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:49,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158680494] [2021-06-12 19:22:49,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158680494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:49,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272133103] [2021-06-12 19:22:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:49,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272133103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:49,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:49,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 19:22:49,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761064941] [2021-06-12 19:22:49,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:22:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:22:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:49,734 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:50,440 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2021-06-12 19:22:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:22:50,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:50,444 INFO L225 Difference]: With dead ends: 3644 [2021-06-12 19:22:50,444 INFO L226 Difference]: Without dead ends: 3632 [2021-06-12 19:22:50,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 643.2ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:22:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-06-12 19:22:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2021-06-12 19:22:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2021-06-12 19:22:50,480 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2021-06-12 19:22:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:50,480 INFO L482 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2021-06-12 19:22:50,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2021-06-12 19:22:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:50,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:50,483 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:50,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,683 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash -740149869, now seen corresponding path program 218 times [2021-06-12 19:22:50,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:50,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829207443] [2021-06-12 19:22:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:50,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:50,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829207443] [2021-06-12 19:22:50,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829207443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450459403] [2021-06-12 19:22:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:50,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450459403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:50,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 19:22:50,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48100016] [2021-06-12 19:22:50,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:22:50,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:50,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:22:50,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:50,946 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:51,576 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2021-06-12 19:22:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 19:22:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:51,580 INFO L225 Difference]: With dead ends: 3521 [2021-06-12 19:22:51,580 INFO L226 Difference]: Without dead ends: 3505 [2021-06-12 19:22:51,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:22:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-06-12 19:22:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2021-06-12 19:22:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2021-06-12 19:22:51,617 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2021-06-12 19:22:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:51,617 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2021-06-12 19:22:51,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2021-06-12 19:22:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:51,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:51,620 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:51,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-12 19:22:51,820 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 614822987, now seen corresponding path program 219 times [2021-06-12 19:22:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035023685] [2021-06-12 19:22:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:51,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:51,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035023685] [2021-06-12 19:22:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035023685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639399151] [2021-06-12 19:22:51,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:51,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:22:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:51,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:52,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639399151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:52,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:52,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-12 19:22:52,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647376259] [2021-06-12 19:22:52,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:52,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:52,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:52,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:52,021 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:52,570 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2021-06-12 19:22:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:22:52,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:52,575 INFO L225 Difference]: With dead ends: 4650 [2021-06-12 19:22:52,575 INFO L226 Difference]: Without dead ends: 4641 [2021-06-12 19:22:52,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:22:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-12 19:22:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2021-06-12 19:22:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2021-06-12 19:22:52,645 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2021-06-12 19:22:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:52,645 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2021-06-12 19:22:52,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2021-06-12 19:22:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:52,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:52,648 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:52,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 19:22:52,849 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash 150231883, now seen corresponding path program 220 times [2021-06-12 19:22:52,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:52,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198806677] [2021-06-12 19:22:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:52,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198806677] [2021-06-12 19:22:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198806677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114452563] [2021-06-12 19:22:52,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:52,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:52,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:53,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114452563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:53,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:53,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-12 19:22:53,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551405789] [2021-06-12 19:22:53,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:53,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:53,016 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:53,993 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2021-06-12 19:22:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 19:22:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:53,997 INFO L225 Difference]: With dead ends: 4324 [2021-06-12 19:22:53,997 INFO L226 Difference]: Without dead ends: 4320 [2021-06-12 19:22:53,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 19:22:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-06-12 19:22:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2021-06-12 19:22:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2021-06-12 19:22:54,055 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2021-06-12 19:22:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:54,055 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2021-06-12 19:22:54,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2021-06-12 19:22:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:54,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:54,059 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:54,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-12 19:22:54,260 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash 116632655, now seen corresponding path program 221 times [2021-06-12 19:22:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:54,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055301759] [2021-06-12 19:22:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:54,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055301759] [2021-06-12 19:22:54,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055301759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575569016] [2021-06-12 19:22:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:54,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:22:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575569016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:54,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 19:22:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430074426] [2021-06-12 19:22:54,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:54,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:54,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:54,481 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:55,289 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2021-06-12 19:22:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 19:22:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:55,294 INFO L225 Difference]: With dead ends: 4399 [2021-06-12 19:22:55,294 INFO L226 Difference]: Without dead ends: 4391 [2021-06-12 19:22:55,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 19:22:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-06-12 19:22:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2021-06-12 19:22:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2021-06-12 19:22:55,354 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2021-06-12 19:22:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:55,354 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2021-06-12 19:22:55,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2021-06-12 19:22:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:55,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:55,358 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:55,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:55,559 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash -924943413, now seen corresponding path program 222 times [2021-06-12 19:22:55,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:55,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481743095] [2021-06-12 19:22:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:55,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481743095] [2021-06-12 19:22:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481743095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040277770] [2021-06-12 19:22:55,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:55,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:22:55,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:55,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:55,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040277770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:55,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 19:22:55,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770470441] [2021-06-12 19:22:55,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:22:55,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:55,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:22:55,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:55,747 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:56,482 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2021-06-12 19:22:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 19:22:56,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:56,487 INFO L225 Difference]: With dead ends: 4554 [2021-06-12 19:22:56,487 INFO L226 Difference]: Without dead ends: 4542 [2021-06-12 19:22:56,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 19:22:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-06-12 19:22:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2021-06-12 19:22:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2021-06-12 19:22:56,557 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2021-06-12 19:22:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:56,558 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2021-06-12 19:22:56,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2021-06-12 19:22:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:56,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:56,562 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:56,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-12 19:22:56,762 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:56,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1145936847, now seen corresponding path program 223 times [2021-06-12 19:22:56,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:56,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584949292] [2021-06-12 19:22:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:56,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:56,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584949292] [2021-06-12 19:22:56,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584949292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389102754] [2021-06-12 19:22:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:56,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389102754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:56,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:56,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 19:22:56,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773875510] [2021-06-12 19:22:56,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:22:56,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:22:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:56,962 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:57,662 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2021-06-12 19:22:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:22:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:57,667 INFO L225 Difference]: With dead ends: 4840 [2021-06-12 19:22:57,667 INFO L226 Difference]: Without dead ends: 4824 [2021-06-12 19:22:57,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:22:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-06-12 19:22:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2021-06-12 19:22:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2021-06-12 19:22:57,720 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2021-06-12 19:22:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:57,720 INFO L482 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2021-06-12 19:22:57,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2021-06-12 19:22:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:57,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:57,724 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:57,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-12 19:22:57,929 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash 918715467, now seen corresponding path program 224 times [2021-06-12 19:22:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:57,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636848538] [2021-06-12 19:22:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:58,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:58,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636848538] [2021-06-12 19:22:58,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636848538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:58,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402861396] [2021-06-12 19:22:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:58,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:58,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:58,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402861396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:58,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:58,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:22:58,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44266903] [2021-06-12 19:22:58,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:22:58,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:58,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:22:58,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:58,191 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:58,784 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2021-06-12 19:22:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:22:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:58,789 INFO L225 Difference]: With dead ends: 4789 [2021-06-12 19:22:58,789 INFO L226 Difference]: Without dead ends: 4769 [2021-06-12 19:22:58,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 598.6ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:22:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-12 19:22:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2021-06-12 19:22:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2021-06-12 19:22:58,844 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2021-06-12 19:22:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:58,844 INFO L482 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2021-06-12 19:22:58,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2021-06-12 19:22:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:58,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:58,848 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:59,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,049 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash 124564107, now seen corresponding path program 225 times [2021-06-12 19:22:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:59,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206379233] [2021-06-12 19:22:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:59,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:59,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206379233] [2021-06-12 19:22:59,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206379233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944442434] [2021-06-12 19:22:59,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:22:59,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:59,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944442434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:59,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 19:22:59,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712898887] [2021-06-12 19:22:59,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:22:59,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:22:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:59,208 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:59,362 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2021-06-12 19:22:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:22:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:59,368 INFO L225 Difference]: With dead ends: 4973 [2021-06-12 19:22:59,368 INFO L226 Difference]: Without dead ends: 4973 [2021-06-12 19:22:59,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-06-12 19:22:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2021-06-12 19:22:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2021-06-12 19:22:59,436 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2021-06-12 19:22:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:59,436 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2021-06-12 19:22:59,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:22:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2021-06-12 19:22:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:22:59,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:59,441 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:59,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-12 19:22:59,641 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1397497815, now seen corresponding path program 226 times [2021-06-12 19:22:59,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:59,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191470451] [2021-06-12 19:22:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:59,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191470451] [2021-06-12 19:22:59,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191470451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092538780] [2021-06-12 19:22:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:59,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:22:59,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:59,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092538780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:59,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:22:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669022918] [2021-06-12 19:22:59,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:59,812 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:00,006 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2021-06-12 19:23:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:23:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:00,012 INFO L225 Difference]: With dead ends: 4567 [2021-06-12 19:23:00,012 INFO L226 Difference]: Without dead ends: 4567 [2021-06-12 19:23:00,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:23:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-06-12 19:23:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2021-06-12 19:23:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2021-06-12 19:23:00,058 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2021-06-12 19:23:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:00,058 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2021-06-12 19:23:00,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2021-06-12 19:23:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:00,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:00,062 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:00,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:00,263 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1207526577, now seen corresponding path program 227 times [2021-06-12 19:23:00,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:00,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306928971] [2021-06-12 19:23:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:00,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:00,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306928971] [2021-06-12 19:23:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306928971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357845439] [2021-06-12 19:23:00,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:00,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:00,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:00,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357845439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:00,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:00,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474137832] [2021-06-12 19:23:00,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:00,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:00,474 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:00,806 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2021-06-12 19:23:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:23:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:00,833 INFO L225 Difference]: With dead ends: 4690 [2021-06-12 19:23:00,833 INFO L226 Difference]: Without dead ends: 4690 [2021-06-12 19:23:00,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:23:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-06-12 19:23:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2021-06-12 19:23:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2021-06-12 19:23:00,878 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2021-06-12 19:23:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:00,879 INFO L482 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2021-06-12 19:23:00,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2021-06-12 19:23:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:00,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:00,883 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:01,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-12 19:23:01,083 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash -321728297, now seen corresponding path program 228 times [2021-06-12 19:23:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:01,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793825565] [2021-06-12 19:23:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:01,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:01,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793825565] [2021-06-12 19:23:01,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793825565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:01,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454165344] [2021-06-12 19:23:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:01,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:01,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454165344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:01,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:01,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:01,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76329708] [2021-06-12 19:23:01,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:01,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:01,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:01,252 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:01,725 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2021-06-12 19:23:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:23:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:01,730 INFO L225 Difference]: With dead ends: 4708 [2021-06-12 19:23:01,730 INFO L226 Difference]: Without dead ends: 4708 [2021-06-12 19:23:01,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:23:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-06-12 19:23:01,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2021-06-12 19:23:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2021-06-12 19:23:01,779 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2021-06-12 19:23:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:01,779 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2021-06-12 19:23:01,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2021-06-12 19:23:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:01,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:01,783 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:01,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:01,984 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1785055823, now seen corresponding path program 229 times [2021-06-12 19:23:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:01,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207117309] [2021-06-12 19:23:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:02,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207117309] [2021-06-12 19:23:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207117309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933020575] [2021-06-12 19:23:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:02,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:02,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:02,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933020575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:02,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:02,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:02,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496521565] [2021-06-12 19:23:02,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:02,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:02,161 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:02,796 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2021-06-12 19:23:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:23:02,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:02,801 INFO L225 Difference]: With dead ends: 4892 [2021-06-12 19:23:02,801 INFO L226 Difference]: Without dead ends: 4892 [2021-06-12 19:23:02,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:23:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-06-12 19:23:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2021-06-12 19:23:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2021-06-12 19:23:02,854 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2021-06-12 19:23:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:02,855 INFO L482 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2021-06-12 19:23:02,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2021-06-12 19:23:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:02,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:02,859 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:03,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 19:23:03,060 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -363740713, now seen corresponding path program 230 times [2021-06-12 19:23:03,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:03,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772078647] [2021-06-12 19:23:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:03,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772078647] [2021-06-12 19:23:03,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772078647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701116043] [2021-06-12 19:23:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:03,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:03,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:03,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701116043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:03,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:03,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:03,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442774330] [2021-06-12 19:23:03,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:03,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:03,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:03,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:03,229 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:03,857 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2021-06-12 19:23:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:23:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:03,863 INFO L225 Difference]: With dead ends: 5068 [2021-06-12 19:23:03,863 INFO L226 Difference]: Without dead ends: 5068 [2021-06-12 19:23:03,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 19:23:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-06-12 19:23:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2021-06-12 19:23:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2021-06-12 19:23:03,937 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2021-06-12 19:23:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:03,937 INFO L482 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2021-06-12 19:23:03,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2021-06-12 19:23:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:03,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:03,942 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:04,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 19:23:04,143 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash 207714093, now seen corresponding path program 231 times [2021-06-12 19:23:04,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:04,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787854389] [2021-06-12 19:23:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:04,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:04,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787854389] [2021-06-12 19:23:04,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787854389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545104596] [2021-06-12 19:23:04,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:04,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:23:04,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:04,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545104596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:04,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:04,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502090123] [2021-06-12 19:23:04,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:04,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:04,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:04,320 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:04,951 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2021-06-12 19:23:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:23:04,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:04,957 INFO L225 Difference]: With dead ends: 4740 [2021-06-12 19:23:04,957 INFO L226 Difference]: Without dead ends: 4734 [2021-06-12 19:23:04,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 19:23:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-06-12 19:23:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2021-06-12 19:23:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2021-06-12 19:23:05,008 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2021-06-12 19:23:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:05,008 INFO L482 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2021-06-12 19:23:05,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:05,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2021-06-12 19:23:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:05,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:05,012 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:05,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-12 19:23:05,212 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1723857453, now seen corresponding path program 232 times [2021-06-12 19:23:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:05,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727230820] [2021-06-12 19:23:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:05,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:05,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727230820] [2021-06-12 19:23:05,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727230820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:05,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548451381] [2021-06-12 19:23:05,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:05,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:05,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548451381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799534495] [2021-06-12 19:23:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:05,390 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:05,956 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2021-06-12 19:23:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:23:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:05,962 INFO L225 Difference]: With dead ends: 5641 [2021-06-12 19:23:05,962 INFO L226 Difference]: Without dead ends: 5629 [2021-06-12 19:23:05,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:23:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-06-12 19:23:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2021-06-12 19:23:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2021-06-12 19:23:06,018 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2021-06-12 19:23:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:06,018 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2021-06-12 19:23:06,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2021-06-12 19:23:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:06,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:06,022 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:06,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:06,223 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2106518739, now seen corresponding path program 233 times [2021-06-12 19:23:06,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:06,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444658214] [2021-06-12 19:23:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:06,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:06,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444658214] [2021-06-12 19:23:06,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444658214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:06,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969144541] [2021-06-12 19:23:06,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:06,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:06,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:06,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969144541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:06,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:06,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358357496] [2021-06-12 19:23:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:06,398 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:07,042 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2021-06-12 19:23:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 19:23:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:07,048 INFO L225 Difference]: With dead ends: 5550 [2021-06-12 19:23:07,048 INFO L226 Difference]: Without dead ends: 5546 [2021-06-12 19:23:07,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 19:23:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-06-12 19:23:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2021-06-12 19:23:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2021-06-12 19:23:07,131 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2021-06-12 19:23:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:07,131 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2021-06-12 19:23:07,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2021-06-12 19:23:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:07,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:07,136 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:07,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 19:23:07,337 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2072919511, now seen corresponding path program 234 times [2021-06-12 19:23:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:07,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397213734] [2021-06-12 19:23:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:07,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:07,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397213734] [2021-06-12 19:23:07,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397213734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:07,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330457460] [2021-06-12 19:23:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:07,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:23:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:07,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330457460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:07,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:07,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:07,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106156795] [2021-06-12 19:23:07,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:07,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:07,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:07,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:07,524 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:08,079 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2021-06-12 19:23:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:23:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:08,086 INFO L225 Difference]: With dead ends: 5471 [2021-06-12 19:23:08,086 INFO L226 Difference]: Without dead ends: 5463 [2021-06-12 19:23:08,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:23:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-12 19:23:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2021-06-12 19:23:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2021-06-12 19:23:08,144 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2021-06-12 19:23:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:08,144 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2021-06-12 19:23:08,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2021-06-12 19:23:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:08,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:08,149 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:08,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:08,349 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1031343443, now seen corresponding path program 235 times [2021-06-12 19:23:08,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:08,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964099083] [2021-06-12 19:23:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:08,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:08,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964099083] [2021-06-12 19:23:08,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964099083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:08,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944989135] [2021-06-12 19:23:08,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:08,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944989135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:08,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:08,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:08,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130185755] [2021-06-12 19:23:08,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:08,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:08,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:08,523 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:09,043 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2021-06-12 19:23:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:23:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:09,049 INFO L225 Difference]: With dead ends: 5651 [2021-06-12 19:23:09,049 INFO L226 Difference]: Without dead ends: 5639 [2021-06-12 19:23:09,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:23:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-06-12 19:23:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2021-06-12 19:23:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2021-06-12 19:23:09,111 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2021-06-12 19:23:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:09,111 INFO L482 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2021-06-12 19:23:09,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2021-06-12 19:23:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:09,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:09,116 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:09,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:09,317 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1192743593, now seen corresponding path program 236 times [2021-06-12 19:23:09,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:09,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248415370] [2021-06-12 19:23:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:09,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248415370] [2021-06-12 19:23:09,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248415370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034747400] [2021-06-12 19:23:09,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:09,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:09,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:09,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:09,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034747400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:09,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:09,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:09,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257567442] [2021-06-12 19:23:09,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:09,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:09,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:09,491 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:09,923 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2021-06-12 19:23:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:23:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:09,930 INFO L225 Difference]: With dead ends: 5785 [2021-06-12 19:23:09,930 INFO L226 Difference]: Without dead ends: 5769 [2021-06-12 19:23:09,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:23:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-12 19:23:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2021-06-12 19:23:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2021-06-12 19:23:09,989 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2021-06-12 19:23:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:09,989 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2021-06-12 19:23:09,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2021-06-12 19:23:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:09,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:09,995 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:10,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-06-12 19:23:10,197 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1419964973, now seen corresponding path program 237 times [2021-06-12 19:23:10,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:10,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001150880] [2021-06-12 19:23:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:10,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001150880] [2021-06-12 19:23:10,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001150880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218701204] [2021-06-12 19:23:10,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:10,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218701204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:23:10,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031730348] [2021-06-12 19:23:10,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:10,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:10,375 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:10,693 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2021-06-12 19:23:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:23:10,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:10,699 INFO L225 Difference]: With dead ends: 5323 [2021-06-12 19:23:10,699 INFO L226 Difference]: Without dead ends: 5313 [2021-06-12 19:23:10,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:23:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-12 19:23:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2021-06-12 19:23:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2021-06-12 19:23:10,759 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2021-06-12 19:23:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:10,759 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2021-06-12 19:23:10,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2021-06-12 19:23:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:10,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:10,764 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:10,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:10,964 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1143175849, now seen corresponding path program 238 times [2021-06-12 19:23:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:10,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609021334] [2021-06-12 19:23:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:11,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:11,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609021334] [2021-06-12 19:23:11,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609021334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:11,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406945621] [2021-06-12 19:23:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:11,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:11,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:11,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:11,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406945621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:11,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:11,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 19:23:11,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785966215] [2021-06-12 19:23:11,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:23:11,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:23:11,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:23:11,135 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:11,260 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2021-06-12 19:23:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:11,265 INFO L225 Difference]: With dead ends: 5170 [2021-06-12 19:23:11,266 INFO L226 Difference]: Without dead ends: 5158 [2021-06-12 19:23:11,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:23:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-06-12 19:23:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2021-06-12 19:23:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2021-06-12 19:23:11,323 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2021-06-12 19:23:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:11,323 INFO L482 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2021-06-12 19:23:11,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2021-06-12 19:23:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:11,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:11,330 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:11,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:11,530 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2091230197, now seen corresponding path program 239 times [2021-06-12 19:23:11,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:11,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564785992] [2021-06-12 19:23:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:11,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564785992] [2021-06-12 19:23:11,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564785992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883632612] [2021-06-12 19:23:11,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:11,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:11,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:11,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883632612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:11,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:11,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:23:11,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555168543] [2021-06-12 19:23:11,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:11,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:11,713 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:12,182 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2021-06-12 19:23:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:23:12,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:12,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:12,189 INFO L225 Difference]: With dead ends: 5204 [2021-06-12 19:23:12,189 INFO L226 Difference]: Without dead ends: 5204 [2021-06-12 19:23:12,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:23:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-06-12 19:23:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2021-06-12 19:23:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2021-06-12 19:23:12,267 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2021-06-12 19:23:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:12,267 INFO L482 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2021-06-12 19:23:12,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2021-06-12 19:23:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:12,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:12,272 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:12,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-12 19:23:12,472 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash 447335179, now seen corresponding path program 240 times [2021-06-12 19:23:12,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:12,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066249067] [2021-06-12 19:23:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:12,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066249067] [2021-06-12 19:23:12,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066249067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219086996] [2021-06-12 19:23:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:12,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:12,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:12,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219086996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:12,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:12,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:23:12,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982567485] [2021-06-12 19:23:12,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:12,656 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:13,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:13,054 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2021-06-12 19:23:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:23:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:13,059 INFO L225 Difference]: With dead ends: 5391 [2021-06-12 19:23:13,060 INFO L226 Difference]: Without dead ends: 5381 [2021-06-12 19:23:13,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:23:13,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-06-12 19:23:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2021-06-12 19:23:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2021-06-12 19:23:13,111 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2021-06-12 19:23:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:13,111 INFO L482 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2021-06-12 19:23:13,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2021-06-12 19:23:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:13,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:13,116 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:13,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 19:23:13,316 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1271890933, now seen corresponding path program 241 times [2021-06-12 19:23:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836397710] [2021-06-12 19:23:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:13,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:13,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836397710] [2021-06-12 19:23:13,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836397710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:13,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120429356] [2021-06-12 19:23:13,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:13,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120429356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:13,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:13,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:23:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952353340] [2021-06-12 19:23:13,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:13,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:13,488 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:13,922 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2021-06-12 19:23:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:23:13,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:13,927 INFO L225 Difference]: With dead ends: 5359 [2021-06-12 19:23:13,927 INFO L226 Difference]: Without dead ends: 5349 [2021-06-12 19:23:13,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:23:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-06-12 19:23:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2021-06-12 19:23:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2021-06-12 19:23:14,003 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2021-06-12 19:23:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:14,003 INFO L482 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2021-06-12 19:23:14,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2021-06-12 19:23:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:14,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:14,009 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:14,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 19:23:14,211 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1720691467, now seen corresponding path program 242 times [2021-06-12 19:23:14,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:14,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328965225] [2021-06-12 19:23:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:14,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:14,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328965225] [2021-06-12 19:23:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328965225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201368777] [2021-06-12 19:23:14,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:14,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:14,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:14,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201368777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:14,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:23:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249099221] [2021-06-12 19:23:14,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:14,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:14,380 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:14,943 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2021-06-12 19:23:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:23:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:14,952 INFO L225 Difference]: With dead ends: 5632 [2021-06-12 19:23:14,952 INFO L226 Difference]: Without dead ends: 5628 [2021-06-12 19:23:14,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:23:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-06-12 19:23:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2021-06-12 19:23:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2021-06-12 19:23:15,020 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2021-06-12 19:23:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:15,020 INFO L482 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2021-06-12 19:23:15,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2021-06-12 19:23:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:15,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:15,025 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:15,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:15,228 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1678679051, now seen corresponding path program 243 times [2021-06-12 19:23:15,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:15,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910064900] [2021-06-12 19:23:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:15,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:15,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910064900] [2021-06-12 19:23:15,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910064900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:15,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536122213] [2021-06-12 19:23:15,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:15,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:23:15,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:15,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:15,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:15,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536122213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:15,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:15,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:23:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595553091] [2021-06-12 19:23:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:15,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:15,396 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:16,008 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2021-06-12 19:23:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:23:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:16,014 INFO L225 Difference]: With dead ends: 5908 [2021-06-12 19:23:16,014 INFO L226 Difference]: Without dead ends: 5908 [2021-06-12 19:23:16,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:23:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-06-12 19:23:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2021-06-12 19:23:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2021-06-12 19:23:16,075 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2021-06-12 19:23:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:16,075 INFO L482 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2021-06-12 19:23:16,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2021-06-12 19:23:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:16,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:16,080 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:16,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-12 19:23:16,281 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2044833439, now seen corresponding path program 244 times [2021-06-12 19:23:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:16,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972005829] [2021-06-12 19:23:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:16,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972005829] [2021-06-12 19:23:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972005829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067552339] [2021-06-12 19:23:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:16,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:16,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:16,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067552339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:16,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:16,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 19:23:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267359130] [2021-06-12 19:23:16,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:16,448 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:17,166 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2021-06-12 19:23:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 19:23:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:17,173 INFO L225 Difference]: With dead ends: 5619 [2021-06-12 19:23:17,173 INFO L226 Difference]: Without dead ends: 5607 [2021-06-12 19:23:17,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 19:23:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-12 19:23:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2021-06-12 19:23:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2021-06-12 19:23:17,234 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2021-06-12 19:23:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:17,234 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2021-06-12 19:23:17,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2021-06-12 19:23:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:17,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:17,239 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:17,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:17,439 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:17,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1509603637, now seen corresponding path program 245 times [2021-06-12 19:23:17,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:17,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783709895] [2021-06-12 19:23:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:17,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:17,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783709895] [2021-06-12 19:23:17,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783709895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:17,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905606508] [2021-06-12 19:23:17,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:17,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:23:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:17,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905606508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:17,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:17,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:23:17,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547901165] [2021-06-12 19:23:17,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:17,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:17,655 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:18,327 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2021-06-12 19:23:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:23:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:18,333 INFO L225 Difference]: With dead ends: 5350 [2021-06-12 19:23:18,333 INFO L226 Difference]: Without dead ends: 5338 [2021-06-12 19:23:18,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:23:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-06-12 19:23:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2021-06-12 19:23:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2021-06-12 19:23:18,394 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2021-06-12 19:23:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:18,394 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2021-06-12 19:23:18,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2021-06-12 19:23:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:18,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:18,399 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:18,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-12 19:23:18,600 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1427351127, now seen corresponding path program 246 times [2021-06-12 19:23:18,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:18,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796595287] [2021-06-12 19:23:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:18,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:18,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796595287] [2021-06-12 19:23:18,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796595287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:18,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497417289] [2021-06-12 19:23:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:18,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497417289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:18,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:18,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 19:23:18,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775418434] [2021-06-12 19:23:18,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:18,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:18,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:18,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:18,794 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:19,335 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2021-06-12 19:23:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:23:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:19,341 INFO L225 Difference]: With dead ends: 5100 [2021-06-12 19:23:19,341 INFO L226 Difference]: Without dead ends: 5100 [2021-06-12 19:23:19,342 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 19:23:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-06-12 19:23:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2021-06-12 19:23:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2021-06-12 19:23:19,416 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2021-06-12 19:23:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:19,416 INFO L482 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2021-06-12 19:23:19,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2021-06-12 19:23:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:19,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:19,421 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:19,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-12 19:23:19,621 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash 208442063, now seen corresponding path program 247 times [2021-06-12 19:23:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:19,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876095451] [2021-06-12 19:23:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:19,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:19,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876095451] [2021-06-12 19:23:19,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876095451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:19,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729602476] [2021-06-12 19:23:19,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:19,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729602476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:19,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:19,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 19:23:19,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230956807] [2021-06-12 19:23:19,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:19,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:19,804 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:20,283 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2021-06-12 19:23:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:23:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:20,289 INFO L225 Difference]: With dead ends: 5184 [2021-06-12 19:23:20,289 INFO L226 Difference]: Without dead ends: 5174 [2021-06-12 19:23:20,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:23:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-06-12 19:23:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2021-06-12 19:23:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2021-06-12 19:23:20,342 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2021-06-12 19:23:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:20,342 INFO L482 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2021-06-12 19:23:20,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2021-06-12 19:23:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:20,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:20,347 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:20,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:20,547 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -662161577, now seen corresponding path program 248 times [2021-06-12 19:23:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:20,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435934859] [2021-06-12 19:23:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:20,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435934859] [2021-06-12 19:23:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435934859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312459843] [2021-06-12 19:23:20,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:20,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:20,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312459843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:20,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:20,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 19:23:20,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11183472] [2021-06-12 19:23:20,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:20,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:20,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:20,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:20,728 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:21,226 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2021-06-12 19:23:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:23:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:21,232 INFO L225 Difference]: With dead ends: 5658 [2021-06-12 19:23:21,232 INFO L226 Difference]: Without dead ends: 5652 [2021-06-12 19:23:21,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:23:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-06-12 19:23:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2021-06-12 19:23:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2021-06-12 19:23:21,317 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2021-06-12 19:23:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:21,317 INFO L482 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2021-06-12 19:23:21,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2021-06-12 19:23:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:21,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:21,322 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:21,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-12 19:23:21,523 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash -274603569, now seen corresponding path program 249 times [2021-06-12 19:23:21,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:21,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171593613] [2021-06-12 19:23:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:21,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171593613] [2021-06-12 19:23:21,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171593613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456584000] [2021-06-12 19:23:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:21,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:21,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456584000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:21,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:21,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 19:23:21,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687299588] [2021-06-12 19:23:21,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:21,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:21,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:21,700 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:22,223 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2021-06-12 19:23:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:23:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:22,230 INFO L225 Difference]: With dead ends: 5753 [2021-06-12 19:23:22,230 INFO L226 Difference]: Without dead ends: 5749 [2021-06-12 19:23:22,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:23:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-06-12 19:23:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2021-06-12 19:23:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2021-06-12 19:23:22,291 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2021-06-12 19:23:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:22,291 INFO L482 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2021-06-12 19:23:22,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2021-06-12 19:23:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:22,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:22,296 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:22,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-12 19:23:22,497 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash 569182295, now seen corresponding path program 250 times [2021-06-12 19:23:22,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:22,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370329711] [2021-06-12 19:23:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:22,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370329711] [2021-06-12 19:23:22,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370329711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054088502] [2021-06-12 19:23:22,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:22,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:22,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:22,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054088502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:22,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 19:23:22,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284092593] [2021-06-12 19:23:22,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:22,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:22,666 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:23,280 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2021-06-12 19:23:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 19:23:23,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:23,286 INFO L225 Difference]: With dead ends: 6063 [2021-06-12 19:23:23,286 INFO L226 Difference]: Without dead ends: 6063 [2021-06-12 19:23:23,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 19:23:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-12 19:23:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2021-06-12 19:23:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2021-06-12 19:23:23,349 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2021-06-12 19:23:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:23,349 INFO L482 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2021-06-12 19:23:23,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2021-06-12 19:23:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:23,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:23,354 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:23,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:23,554 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:23,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1140637101, now seen corresponding path program 251 times [2021-06-12 19:23:23,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:23,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315007058] [2021-06-12 19:23:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:23,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315007058] [2021-06-12 19:23:23,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315007058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354631685] [2021-06-12 19:23:23,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:23,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:23,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354631685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:23,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:23,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 19:23:23,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526196547] [2021-06-12 19:23:23,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:23,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:23,736 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:24,463 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2021-06-12 19:23:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:23:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:24,469 INFO L225 Difference]: With dead ends: 5817 [2021-06-12 19:23:24,469 INFO L226 Difference]: Without dead ends: 5808 [2021-06-12 19:23:24,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:23:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-06-12 19:23:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2021-06-12 19:23:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2021-06-12 19:23:24,538 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2021-06-12 19:23:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:24,538 INFO L482 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2021-06-12 19:23:24,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2021-06-12 19:23:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:24,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:24,543 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:24,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 19:23:24,744 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1675866903, now seen corresponding path program 252 times [2021-06-12 19:23:24,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:24,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167662637] [2021-06-12 19:23:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:24,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167662637] [2021-06-12 19:23:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167662637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416042082] [2021-06-12 19:23:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:24,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:23:24,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:24,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416042082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:24,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 19:23:24,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614374178] [2021-06-12 19:23:24,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:24,964 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:25,655 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2021-06-12 19:23:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 19:23:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:25,661 INFO L225 Difference]: With dead ends: 5773 [2021-06-12 19:23:25,661 INFO L226 Difference]: Without dead ends: 5755 [2021-06-12 19:23:25,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:23:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-06-12 19:23:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2021-06-12 19:23:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2021-06-12 19:23:25,714 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2021-06-12 19:23:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:25,715 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2021-06-12 19:23:25,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2021-06-12 19:23:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:25,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:25,719 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:25,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 19:23:25,919 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1088121581, now seen corresponding path program 253 times [2021-06-12 19:23:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605630121] [2021-06-12 19:23:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:25,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:25,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605630121] [2021-06-12 19:23:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605630121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:25,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190858874] [2021-06-12 19:23:25,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190858874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:26,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:26,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 19:23:26,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225749246] [2021-06-12 19:23:26,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:26,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:26,120 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:26,755 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2021-06-12 19:23:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 19:23:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:26,760 INFO L225 Difference]: With dead ends: 5582 [2021-06-12 19:23:26,760 INFO L226 Difference]: Without dead ends: 5564 [2021-06-12 19:23:26,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:23:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-12 19:23:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2021-06-12 19:23:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2021-06-12 19:23:26,818 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2021-06-12 19:23:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:26,818 INFO L482 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2021-06-12 19:23:26,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2021-06-12 19:23:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:26,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:26,822 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-12 19:23:27,025 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1165777525, now seen corresponding path program 254 times [2021-06-12 19:23:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274310438] [2021-06-12 19:23:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:27,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274310438] [2021-06-12 19:23:27,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274310438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34433999] [2021-06-12 19:23:27,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:27,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:27,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:27,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:27,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34433999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:27,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:27,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 19:23:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995762911] [2021-06-12 19:23:27,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:23:27,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:27,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:23:27,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:23:27,232 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:27,833 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2021-06-12 19:23:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:23:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:27,839 INFO L225 Difference]: With dead ends: 5063 [2021-06-12 19:23:27,839 INFO L226 Difference]: Without dead ends: 5063 [2021-06-12 19:23:27,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 19:23:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-06-12 19:23:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2021-06-12 19:23:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2021-06-12 19:23:27,893 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2021-06-12 19:23:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:27,893 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2021-06-12 19:23:27,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2021-06-12 19:23:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:27,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:27,898 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:28,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-12 19:23:28,101 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1392690059, now seen corresponding path program 255 times [2021-06-12 19:23:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189266365] [2021-06-12 19:23:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:28,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:28,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189266365] [2021-06-12 19:23:28,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189266365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:28,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750021218] [2021-06-12 19:23:28,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:28,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:23:28,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:28,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:28,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750021218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:28,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:28,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 19:23:28,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539331839] [2021-06-12 19:23:28,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:28,293 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:28,836 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2021-06-12 19:23:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:23:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:28,842 INFO L225 Difference]: With dead ends: 5220 [2021-06-12 19:23:28,842 INFO L226 Difference]: Without dead ends: 5210 [2021-06-12 19:23:28,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:23:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-06-12 19:23:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2021-06-12 19:23:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2021-06-12 19:23:28,891 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2021-06-12 19:23:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:28,891 INFO L482 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2021-06-12 19:23:28,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2021-06-12 19:23:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:28,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:28,895 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:29,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-12 19:23:29,096 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1059579275, now seen corresponding path program 256 times [2021-06-12 19:23:29,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:29,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996784326] [2021-06-12 19:23:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:29,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:29,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996784326] [2021-06-12 19:23:29,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996784326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:29,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501812633] [2021-06-12 19:23:29,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:29,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:29,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501812633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:29,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:29,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 19:23:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365001961] [2021-06-12 19:23:29,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:29,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:29,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:29,285 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:29,821 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2021-06-12 19:23:29,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:23:29,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:29,828 INFO L225 Difference]: With dead ends: 5724 [2021-06-12 19:23:29,828 INFO L226 Difference]: Without dead ends: 5718 [2021-06-12 19:23:29,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:23:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-06-12 19:23:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2021-06-12 19:23:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2021-06-12 19:23:29,886 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2021-06-12 19:23:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:29,887 INFO L482 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2021-06-12 19:23:29,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2021-06-12 19:23:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:29,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:29,891 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:30,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:30,092 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1999207541, now seen corresponding path program 257 times [2021-06-12 19:23:30,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:30,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870228597] [2021-06-12 19:23:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:30,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870228597] [2021-06-12 19:23:30,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870228597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:30,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012544917] [2021-06-12 19:23:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:30,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:23:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:30,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:30,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012544917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:30,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:30,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 19:23:30,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039779607] [2021-06-12 19:23:30,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:30,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:30,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:30,269 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:30,802 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2021-06-12 19:23:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:23:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:30,810 INFO L225 Difference]: With dead ends: 6302 [2021-06-12 19:23:30,810 INFO L226 Difference]: Without dead ends: 6300 [2021-06-12 19:23:30,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:23:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-12 19:23:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2021-06-12 19:23:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2021-06-12 19:23:30,875 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2021-06-12 19:23:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:30,875 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2021-06-12 19:23:30,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2021-06-12 19:23:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:30,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:30,880 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:31,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:31,080 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash 534521227, now seen corresponding path program 258 times [2021-06-12 19:23:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195908433] [2021-06-12 19:23:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:31,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:31,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195908433] [2021-06-12 19:23:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195908433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714439310] [2021-06-12 19:23:31,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:31,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:23:31,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:31,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714439310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:31,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 19:23:31,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188150138] [2021-06-12 19:23:31,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:31,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:31,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:31,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:31,252 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:31,798 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2021-06-12 19:23:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:23:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:31,804 INFO L225 Difference]: With dead ends: 6307 [2021-06-12 19:23:31,804 INFO L226 Difference]: Without dead ends: 6307 [2021-06-12 19:23:31,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:23:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-06-12 19:23:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2021-06-12 19:23:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2021-06-12 19:23:31,866 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2021-06-12 19:23:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:31,866 INFO L482 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2021-06-12 19:23:31,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2021-06-12 19:23:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:31,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:31,871 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:32,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:32,072 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:32,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1105976033, now seen corresponding path program 259 times [2021-06-12 19:23:32,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:32,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628089178] [2021-06-12 19:23:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:32,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:32,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628089178] [2021-06-12 19:23:32,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628089178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:32,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570753126] [2021-06-12 19:23:32,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:32,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570753126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:32,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:32,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 19:23:32,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208566092] [2021-06-12 19:23:32,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:32,282 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:33,111 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2021-06-12 19:23:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 19:23:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:33,118 INFO L225 Difference]: With dead ends: 6203 [2021-06-12 19:23:33,118 INFO L226 Difference]: Without dead ends: 6194 [2021-06-12 19:23:33,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 19:23:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-06-12 19:23:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2021-06-12 19:23:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2021-06-12 19:23:33,182 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2021-06-12 19:23:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:33,182 INFO L482 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2021-06-12 19:23:33,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2021-06-12 19:23:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:33,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:33,187 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:33,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:33,387 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1641205835, now seen corresponding path program 260 times [2021-06-12 19:23:33,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:33,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429185434] [2021-06-12 19:23:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:33,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:33,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429185434] [2021-06-12 19:23:33,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429185434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:33,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574247292] [2021-06-12 19:23:33,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:33,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:33,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:33,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:33,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574247292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:33,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:33,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 19:23:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820559200] [2021-06-12 19:23:33,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:33,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:33,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:33,569 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:34,316 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2021-06-12 19:23:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:23:34,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:34,323 INFO L225 Difference]: With dead ends: 6188 [2021-06-12 19:23:34,323 INFO L226 Difference]: Without dead ends: 6176 [2021-06-12 19:23:34,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 668.5ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:23:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-12 19:23:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2021-06-12 19:23:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2021-06-12 19:23:34,387 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2021-06-12 19:23:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:34,387 INFO L482 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2021-06-12 19:23:34,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2021-06-12 19:23:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:34,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:34,392 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:34,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 19:23:34,593 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1053460513, now seen corresponding path program 261 times [2021-06-12 19:23:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:34,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356487843] [2021-06-12 19:23:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:34,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356487843] [2021-06-12 19:23:34,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356487843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120797324] [2021-06-12 19:23:34,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:34,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:34,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:34,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120797324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:34,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:34,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 19:23:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528731354] [2021-06-12 19:23:34,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:34,783 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:35,489 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2021-06-12 19:23:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:23:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:35,496 INFO L225 Difference]: With dead ends: 6237 [2021-06-12 19:23:35,496 INFO L226 Difference]: Without dead ends: 6219 [2021-06-12 19:23:35,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:23:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-06-12 19:23:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2021-06-12 19:23:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2021-06-12 19:23:35,580 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2021-06-12 19:23:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:35,580 INFO L482 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2021-06-12 19:23:35,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2021-06-12 19:23:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:35,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:35,585 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:35,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 19:23:35,785 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 13224715, now seen corresponding path program 262 times [2021-06-12 19:23:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:35,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739525693] [2021-06-12 19:23:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739525693] [2021-06-12 19:23:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739525693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075654048] [2021-06-12 19:23:35,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:35,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:35,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075654048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:36,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:36,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 19:23:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967146494] [2021-06-12 19:23:36,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:23:36,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:23:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:23:36,014 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:36,648 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2021-06-12 19:23:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 19:23:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:36,654 INFO L225 Difference]: With dead ends: 6089 [2021-06-12 19:23:36,654 INFO L226 Difference]: Without dead ends: 6065 [2021-06-12 19:23:36,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:23:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-06-12 19:23:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2021-06-12 19:23:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2021-06-12 19:23:36,722 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2021-06-12 19:23:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:36,722 INFO L482 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2021-06-12 19:23:36,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2021-06-12 19:23:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:36,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:36,727 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:36,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 19:23:36,928 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash 51612887, now seen corresponding path program 263 times [2021-06-12 19:23:36,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:36,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530411820] [2021-06-12 19:23:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:36,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:36,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530411820] [2021-06-12 19:23:36,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530411820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:36,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497212432] [2021-06-12 19:23:36,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:37,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:23:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497212432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:37,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:37,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:23:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069148083] [2021-06-12 19:23:37,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:23:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:23:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:23:37,161 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:37,795 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2021-06-12 19:23:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:23:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:37,802 INFO L225 Difference]: With dead ends: 5685 [2021-06-12 19:23:37,802 INFO L226 Difference]: Without dead ends: 5685 [2021-06-12 19:23:37,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 19:23:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-06-12 19:23:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2021-06-12 19:23:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2021-06-12 19:23:37,858 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2021-06-12 19:23:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:37,859 INFO L482 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2021-06-12 19:23:37,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2021-06-12 19:23:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:37,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:37,863 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:38,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 19:23:38,073 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash -550327729, now seen corresponding path program 264 times [2021-06-12 19:23:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:38,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100601704] [2021-06-12 19:23:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:38,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:38,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100601704] [2021-06-12 19:23:38,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100601704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:38,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373240648] [2021-06-12 19:23:38,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:38,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:38,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:38,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373240648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:38,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:38,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 19:23:38,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076386387] [2021-06-12 19:23:38,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:23:38,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:38,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:23:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:23:38,283 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:38,842 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2021-06-12 19:23:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:23:38,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:38,850 INFO L225 Difference]: With dead ends: 6196 [2021-06-12 19:23:38,850 INFO L226 Difference]: Without dead ends: 6196 [2021-06-12 19:23:38,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 498.9ms TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 19:23:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-06-12 19:23:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2021-06-12 19:23:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2021-06-12 19:23:38,925 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2021-06-12 19:23:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:38,925 INFO L482 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2021-06-12 19:23:38,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2021-06-12 19:23:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:38,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:38,931 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:39,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-12 19:23:39,132 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:39,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1401029161, now seen corresponding path program 265 times [2021-06-12 19:23:39,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:39,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336821366] [2021-06-12 19:23:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:39,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:39,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336821366] [2021-06-12 19:23:39,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336821366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:39,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164983560] [2021-06-12 19:23:39,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164983560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:39,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:39,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 19:23:39,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044516674] [2021-06-12 19:23:39,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:39,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:39,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:39,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:39,358 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:39,918 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2021-06-12 19:23:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:23:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:39,924 INFO L225 Difference]: With dead ends: 6611 [2021-06-12 19:23:39,924 INFO L226 Difference]: Without dead ends: 6611 [2021-06-12 19:23:39,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:23:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-06-12 19:23:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2021-06-12 19:23:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2021-06-12 19:23:39,994 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2021-06-12 19:23:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:39,994 INFO L482 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2021-06-12 19:23:39,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2021-06-12 19:23:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:40,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:40,000 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:40,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-12 19:23:40,200 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 372644175, now seen corresponding path program 266 times [2021-06-12 19:23:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:40,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21276418] [2021-06-12 19:23:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21276418] [2021-06-12 19:23:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21276418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319351317] [2021-06-12 19:23:40,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:40,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319351317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:40,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 19:23:40,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8722598] [2021-06-12 19:23:40,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:40,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:40,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:40,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:40,378 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:40,932 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2021-06-12 19:23:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:23:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:40,941 INFO L225 Difference]: With dead ends: 7182 [2021-06-12 19:23:40,941 INFO L226 Difference]: Without dead ends: 7182 [2021-06-12 19:23:40,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:23:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2021-06-12 19:23:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2021-06-12 19:23:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2021-06-12 19:23:41,034 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2021-06-12 19:23:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:41,034 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2021-06-12 19:23:41,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2021-06-12 19:23:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:41,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:41,040 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:41,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:41,241 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -539971881, now seen corresponding path program 267 times [2021-06-12 19:23:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:41,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485299988] [2021-06-12 19:23:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:41,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485299988] [2021-06-12 19:23:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485299988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122130886] [2021-06-12 19:23:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:41,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122130886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:41,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:41,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-12 19:23:41,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053596037] [2021-06-12 19:23:41,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:41,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:41,418 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:41,981 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2021-06-12 19:23:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:23:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:41,992 INFO L225 Difference]: With dead ends: 8455 [2021-06-12 19:23:41,993 INFO L226 Difference]: Without dead ends: 8455 [2021-06-12 19:23:41,993 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:23:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-06-12 19:23:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2021-06-12 19:23:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2021-06-12 19:23:42,104 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2021-06-12 19:23:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:42,104 INFO L482 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2021-06-12 19:23:42,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2021-06-12 19:23:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:42,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:42,112 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:42,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-12 19:23:42,313 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash 31482925, now seen corresponding path program 268 times [2021-06-12 19:23:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:42,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153560578] [2021-06-12 19:23:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:42,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:42,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153560578] [2021-06-12 19:23:42,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153560578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:42,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280488781] [2021-06-12 19:23:42,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:42,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:42,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280488781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:42,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:42,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-12 19:23:42,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738058376] [2021-06-12 19:23:42,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:42,486 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:43,454 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2021-06-12 19:23:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 19:23:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:43,463 INFO L225 Difference]: With dead ends: 8123 [2021-06-12 19:23:43,463 INFO L226 Difference]: Without dead ends: 8117 [2021-06-12 19:23:43,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 19:23:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-12 19:23:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2021-06-12 19:23:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2021-06-12 19:23:43,555 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2021-06-12 19:23:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:43,555 INFO L482 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2021-06-12 19:23:43,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2021-06-12 19:23:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:43,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:43,562 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:43,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:43,762 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash 566712727, now seen corresponding path program 269 times [2021-06-12 19:23:43,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:43,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885134795] [2021-06-12 19:23:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:43,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885134795] [2021-06-12 19:23:43,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885134795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505037968] [2021-06-12 19:23:43,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:43,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:23:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:43,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505037968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:43,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:43,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 19:23:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67215821] [2021-06-12 19:23:43,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:43,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:43,947 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:44,807 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2021-06-12 19:23:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 19:23:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:44,816 INFO L225 Difference]: With dead ends: 8123 [2021-06-12 19:23:44,816 INFO L226 Difference]: Without dead ends: 8111 [2021-06-12 19:23:44,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 759.2ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 19:23:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-06-12 19:23:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2021-06-12 19:23:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2021-06-12 19:23:44,907 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2021-06-12 19:23:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:44,907 INFO L482 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2021-06-12 19:23:44,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2021-06-12 19:23:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:44,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:44,914 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:45,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:45,114 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash -21032595, now seen corresponding path program 270 times [2021-06-12 19:23:45,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:45,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250590299] [2021-06-12 19:23:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:45,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:45,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250590299] [2021-06-12 19:23:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250590299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378065875] [2021-06-12 19:23:45,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:45,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:23:45,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:45,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378065875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:45,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:45,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 19:23:45,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949190743] [2021-06-12 19:23:45,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:45,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:45,314 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:46,057 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2021-06-12 19:23:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 19:23:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:46,094 INFO L225 Difference]: With dead ends: 8230 [2021-06-12 19:23:46,094 INFO L226 Difference]: Without dead ends: 8212 [2021-06-12 19:23:46,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 19:23:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2021-06-12 19:23:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2021-06-12 19:23:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2021-06-12 19:23:46,179 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2021-06-12 19:23:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:46,179 INFO L482 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2021-06-12 19:23:46,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2021-06-12 19:23:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:46,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:46,186 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:46,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:46,387 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:46,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1061268393, now seen corresponding path program 271 times [2021-06-12 19:23:46,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:46,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683187680] [2021-06-12 19:23:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:46,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:46,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683187680] [2021-06-12 19:23:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683187680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:46,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614002307] [2021-06-12 19:23:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:46,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614002307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:46,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:46,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 19:23:46,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099634694] [2021-06-12 19:23:46,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:23:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:46,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:23:46,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:23:46,610 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:47,377 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2021-06-12 19:23:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:23:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:47,386 INFO L225 Difference]: With dead ends: 8473 [2021-06-12 19:23:47,386 INFO L226 Difference]: Without dead ends: 8449 [2021-06-12 19:23:47,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:23:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-06-12 19:23:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2021-06-12 19:23:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2021-06-12 19:23:47,484 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2021-06-12 19:23:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:47,484 INFO L482 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2021-06-12 19:23:47,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2021-06-12 19:23:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:23:47,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:47,531 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:47,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-12 19:23:47,732 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1051160237, now seen corresponding path program 272 times [2021-06-12 19:23:47,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:47,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811132604] [2021-06-12 19:23:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:47,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:47,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811132604] [2021-06-12 19:23:47,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811132604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:47,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537558307] [2021-06-12 19:23:47,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:47,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:47,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:23:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:47,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537558307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:47,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:47,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:23:47,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595402013] [2021-06-12 19:23:47,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:23:47,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:47,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:23:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:23:47,949 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:48,564 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2021-06-12 19:23:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:23:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:23:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:48,574 INFO L225 Difference]: With dead ends: 8382 [2021-06-12 19:23:48,574 INFO L226 Difference]: Without dead ends: 8352 [2021-06-12 19:23:48,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:23:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-12 19:23:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2021-06-12 19:23:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2021-06-12 19:23:48,675 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2021-06-12 19:23:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:48,675 INFO L482 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2021-06-12 19:23:48,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:48,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2021-06-12 19:23:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:48,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:48,682 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:48,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-12 19:23:48,883 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash -943740933, now seen corresponding path program 273 times [2021-06-12 19:23:48,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:48,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38812233] [2021-06-12 19:23:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:49,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:49,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38812233] [2021-06-12 19:23:49,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38812233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:49,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444873567] [2021-06-12 19:23:49,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:49,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:49,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:49,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444873567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:49,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:49,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:23:49,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343797968] [2021-06-12 19:23:49,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:49,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:49,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:49,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:49,222 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:49,715 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2021-06-12 19:23:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:23:49,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:49,725 INFO L225 Difference]: With dead ends: 7724 [2021-06-12 19:23:49,725 INFO L226 Difference]: Without dead ends: 7695 [2021-06-12 19:23:49,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:23:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-06-12 19:23:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2021-06-12 19:23:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2021-06-12 19:23:49,818 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2021-06-12 19:23:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:49,818 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2021-06-12 19:23:49,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2021-06-12 19:23:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:49,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:49,826 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:50,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-12 19:23:50,027 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1733943489, now seen corresponding path program 274 times [2021-06-12 19:23:50,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:50,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057356383] [2021-06-12 19:23:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:50,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057356383] [2021-06-12 19:23:50,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057356383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971737386] [2021-06-12 19:23:50,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:50,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:50,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:50,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971737386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:50,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:50,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:23:50,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542580448] [2021-06-12 19:23:50,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:50,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:50,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:50,403 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:50,694 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2021-06-12 19:23:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:23:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:50,705 INFO L225 Difference]: With dead ends: 7815 [2021-06-12 19:23:50,705 INFO L226 Difference]: Without dead ends: 7808 [2021-06-12 19:23:50,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:23:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-06-12 19:23:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2021-06-12 19:23:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2021-06-12 19:23:50,851 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2021-06-12 19:23:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:50,851 INFO L482 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2021-06-12 19:23:50,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2021-06-12 19:23:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:50,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:50,859 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:51,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-12 19:23:51,060 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:51,060 INFO L82 PathProgramCache]: Analyzing trace with hash -119240765, now seen corresponding path program 275 times [2021-06-12 19:23:51,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:51,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120435590] [2021-06-12 19:23:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:51,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:51,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120435590] [2021-06-12 19:23:51,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120435590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:51,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565064735] [2021-06-12 19:23:51,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:51,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:51,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:51,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565064735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:51,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:51,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-12 19:23:51,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118373560] [2021-06-12 19:23:51,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:51,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:51,385 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:51,693 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2021-06-12 19:23:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:51,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:51,704 INFO L225 Difference]: With dead ends: 7801 [2021-06-12 19:23:51,704 INFO L226 Difference]: Without dead ends: 7785 [2021-06-12 19:23:51,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:23:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-06-12 19:23:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2021-06-12 19:23:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-12 19:23:51,809 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-12 19:23:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:51,809 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-12 19:23:51,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-12 19:23:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:51,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:51,817 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:52,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:52,018 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1162488683, now seen corresponding path program 276 times [2021-06-12 19:23:52,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:52,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103155646] [2021-06-12 19:23:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:52,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:52,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103155646] [2021-06-12 19:23:52,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103155646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:52,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967515633] [2021-06-12 19:23:52,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:52,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:23:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:52,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967515633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:52,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:52,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:23:52,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218451529] [2021-06-12 19:23:52,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:52,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:52,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:52,362 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:52,700 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2021-06-12 19:23:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:52,708 INFO L225 Difference]: With dead ends: 7734 [2021-06-12 19:23:52,708 INFO L226 Difference]: Without dead ends: 7727 [2021-06-12 19:23:52,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:23:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-06-12 19:23:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2021-06-12 19:23:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-12 19:23:52,799 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-12 19:23:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:52,799 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-12 19:23:52,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-12 19:23:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:52,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:52,806 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:53,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:53,007 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash -627258881, now seen corresponding path program 277 times [2021-06-12 19:23:53,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:53,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661402757] [2021-06-12 19:23:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:53,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661402757] [2021-06-12 19:23:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661402757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082435220] [2021-06-12 19:23:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:53,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:53,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082435220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:53,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:53,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:23:53,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831680454] [2021-06-12 19:23:53,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:53,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:53,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:53,340 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:53,685 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2021-06-12 19:23:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:53,695 INFO L225 Difference]: With dead ends: 7751 [2021-06-12 19:23:53,695 INFO L226 Difference]: Without dead ends: 7744 [2021-06-12 19:23:53,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:23:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-06-12 19:23:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2021-06-12 19:23:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-12 19:23:53,791 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-12 19:23:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:53,791 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-12 19:23:53,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-12 19:23:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:53,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:53,799 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:53,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 19:23:53,999 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:53,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1215004203, now seen corresponding path program 278 times [2021-06-12 19:23:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:54,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552341689] [2021-06-12 19:23:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:54,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:54,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552341689] [2021-06-12 19:23:54,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552341689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:54,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321351361] [2021-06-12 19:23:54,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:54,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:54,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321351361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:23:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449478206] [2021-06-12 19:23:54,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:54,355 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:54,743 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2021-06-12 19:23:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:54,753 INFO L225 Difference]: With dead ends: 7771 [2021-06-12 19:23:54,753 INFO L226 Difference]: Without dead ends: 7764 [2021-06-12 19:23:54,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2021-06-12 19:23:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2021-06-12 19:23:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-12 19:23:54,851 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-12 19:23:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:54,851 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-12 19:23:54,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-12 19:23:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:54,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:54,859 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:55,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:55,059 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2039727295, now seen corresponding path program 279 times [2021-06-12 19:23:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:55,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709198021] [2021-06-12 19:23:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:55,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:55,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709198021] [2021-06-12 19:23:55,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709198021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:55,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978144704] [2021-06-12 19:23:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:55,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:23:55,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:55,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978144704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:55,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:55,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:23:55,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283792397] [2021-06-12 19:23:55,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:55,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:55,409 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:55,845 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2021-06-12 19:23:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:23:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:55,854 INFO L225 Difference]: With dead ends: 7671 [2021-06-12 19:23:55,854 INFO L226 Difference]: Without dead ends: 7664 [2021-06-12 19:23:55,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 377.5ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:23:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-06-12 19:23:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2021-06-12 19:23:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-06-12 19:23:55,939 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-06-12 19:23:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:55,939 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-06-12 19:23:55,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-06-12 19:23:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:55,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:55,947 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:56,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:56,147 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1090073861, now seen corresponding path program 280 times [2021-06-12 19:23:56,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:56,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365554155] [2021-06-12 19:23:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:56,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365554155] [2021-06-12 19:23:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365554155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920618609] [2021-06-12 19:23:56,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:56,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:56,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:56,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:56,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:56,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920618609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:56,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:56,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:23:56,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782696006] [2021-06-12 19:23:56,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:56,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:56,523 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:56,728 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2021-06-12 19:23:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:23:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:56,737 INFO L225 Difference]: With dead ends: 7746 [2021-06-12 19:23:56,738 INFO L226 Difference]: Without dead ends: 7739 [2021-06-12 19:23:56,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:23:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2021-06-12 19:23:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2021-06-12 19:23:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1463804826023196) internal successors, (23601), 7501 states have internal predecessors, (23601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2021-06-12 19:23:56,829 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2021-06-12 19:23:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:56,829 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2021-06-12 19:23:56,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2021-06-12 19:23:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:56,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:56,837 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:57,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 19:23:57,037 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:57,038 INFO L82 PathProgramCache]: Analyzing trace with hash 524628863, now seen corresponding path program 281 times [2021-06-12 19:23:57,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:57,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837959408] [2021-06-12 19:23:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837959408] [2021-06-12 19:23:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837959408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449084264] [2021-06-12 19:23:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:57,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:23:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:57,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:57,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449084264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:57,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:57,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 19:23:57,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907725622] [2021-06-12 19:23:57,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:57,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:57,456 INFO L87 Difference]: Start difference. First operand 7502 states and 23601 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:57,706 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2021-06-12 19:23:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:23:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:57,716 INFO L225 Difference]: With dead ends: 7747 [2021-06-12 19:23:57,716 INFO L226 Difference]: Without dead ends: 7738 [2021-06-12 19:23:57,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:23:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-06-12 19:23:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2021-06-12 19:23:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-06-12 19:23:57,834 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-06-12 19:23:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:57,834 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-06-12 19:23:57,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-06-12 19:23:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:57,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:57,842 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:58,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 19:23:58,043 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:58,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1554664965, now seen corresponding path program 282 times [2021-06-12 19:23:58,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:58,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895078401] [2021-06-12 19:23:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:58,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:58,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895078401] [2021-06-12 19:23:58,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895078401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:58,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777893191] [2021-06-12 19:23:58,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:58,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:23:58,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:58,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:58,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777893191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:58,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:58,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:23:58,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805277684] [2021-06-12 19:23:58,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:58,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:58,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:58,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:58,415 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:58,648 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2021-06-12 19:23:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:23:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:58,658 INFO L225 Difference]: With dead ends: 7686 [2021-06-12 19:23:58,659 INFO L226 Difference]: Without dead ends: 7679 [2021-06-12 19:23:58,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:23:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-06-12 19:23:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2021-06-12 19:23:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-06-12 19:23:58,753 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-06-12 19:23:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:58,753 INFO L482 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-06-12 19:23:58,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-06-12 19:23:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:58,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:58,761 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:58,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:58,961 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1690015423, now seen corresponding path program 283 times [2021-06-12 19:23:58,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:58,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976642749] [2021-06-12 19:23:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:59,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:59,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976642749] [2021-06-12 19:23:59,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976642749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:59,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110251501] [2021-06-12 19:23:59,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:23:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:59,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110251501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:59,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:59,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-12 19:23:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855742152] [2021-06-12 19:23:59,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:23:59,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:23:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:59,452 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:59,781 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2021-06-12 19:23:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:23:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:59,790 INFO L225 Difference]: With dead ends: 8082 [2021-06-12 19:23:59,791 INFO L226 Difference]: Without dead ends: 8065 [2021-06-12 19:23:59,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:23:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-06-12 19:23:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2021-06-12 19:23:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.15370611183355) internal successors, (24252), 7690 states have internal predecessors, (24252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2021-06-12 19:23:59,887 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2021-06-12 19:23:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:59,888 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2021-06-12 19:23:59,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:23:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2021-06-12 19:23:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:23:59,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:59,896 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:00,096 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -990249149, now seen corresponding path program 284 times [2021-06-12 19:24:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165141971] [2021-06-12 19:24:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:00,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165141971] [2021-06-12 19:24:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165141971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334565564] [2021-06-12 19:24:00,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:00,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:00,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:00,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334565564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:00,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:00,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:00,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980892106] [2021-06-12 19:24:00,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:00,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:00,415 INFO L87 Difference]: Start difference. First operand 7691 states and 24252 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:00,695 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2021-06-12 19:24:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:00,705 INFO L225 Difference]: With dead ends: 8086 [2021-06-12 19:24:00,705 INFO L226 Difference]: Without dead ends: 8068 [2021-06-12 19:24:00,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-06-12 19:24:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2021-06-12 19:24:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 7640 states have (on average 3.148167539267016) internal successors, (24052), 7640 states have internal predecessors, (24052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2021-06-12 19:24:00,802 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2021-06-12 19:24:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:00,802 INFO L482 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2021-06-12 19:24:00,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2021-06-12 19:24:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:00,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:00,811 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:01,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-12 19:24:01,011 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1225424319, now seen corresponding path program 285 times [2021-06-12 19:24:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:01,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115950909] [2021-06-12 19:24:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:01,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:01,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115950909] [2021-06-12 19:24:01,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115950909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:01,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848127354] [2021-06-12 19:24:01,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:01,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:24:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:01,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848127354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:01,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:01,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:01,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555705680] [2021-06-12 19:24:01,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:01,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:01,385 INFO L87 Difference]: Start difference. First operand 7641 states and 24052 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:01,719 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2021-06-12 19:24:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:01,729 INFO L225 Difference]: With dead ends: 7976 [2021-06-12 19:24:01,729 INFO L226 Difference]: Without dead ends: 7954 [2021-06-12 19:24:01,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-06-12 19:24:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2021-06-12 19:24:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-06-12 19:24:01,825 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-06-12 19:24:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:01,825 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-06-12 19:24:01,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-06-12 19:24:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:01,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:01,833 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:02,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:02,034 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1191825091, now seen corresponding path program 286 times [2021-06-12 19:24:02,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:02,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182474665] [2021-06-12 19:24:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:02,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182474665] [2021-06-12 19:24:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182474665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768225122] [2021-06-12 19:24:02,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:02,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:02,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:02,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768225122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:02,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:02,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:02,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145184823] [2021-06-12 19:24:02,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:02,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:02,373 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:02,661 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2021-06-12 19:24:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:02,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:02,671 INFO L225 Difference]: With dead ends: 7875 [2021-06-12 19:24:02,671 INFO L226 Difference]: Without dead ends: 7868 [2021-06-12 19:24:02,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2021-06-12 19:24:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2021-06-12 19:24:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-06-12 19:24:02,764 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-06-12 19:24:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:02,764 INFO L482 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-06-12 19:24:02,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-06-12 19:24:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:02,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:02,772 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:02,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable493 [2021-06-12 19:24:02,973 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2075509483, now seen corresponding path program 287 times [2021-06-12 19:24:02,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:02,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55017354] [2021-06-12 19:24:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:03,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55017354] [2021-06-12 19:24:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55017354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037986763] [2021-06-12 19:24:03,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:03,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:24:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:03,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:03,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037986763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:03,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:03,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:24:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711522830] [2021-06-12 19:24:03,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:03,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:03,357 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:03,590 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2021-06-12 19:24:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:24:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:03,600 INFO L225 Difference]: With dead ends: 7842 [2021-06-12 19:24:03,600 INFO L226 Difference]: Without dead ends: 7829 [2021-06-12 19:24:03,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2021-06-12 19:24:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2021-06-12 19:24:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 3.1456553174707507) internal successors, (23929), 7607 states have internal predecessors, (23929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2021-06-12 19:24:03,693 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2021-06-12 19:24:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:03,694 INFO L482 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2021-06-12 19:24:03,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2021-06-12 19:24:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:03,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:03,701 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:03,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 19:24:03,902 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:03,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1973437307, now seen corresponding path program 288 times [2021-06-12 19:24:03,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:03,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242699842] [2021-06-12 19:24:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:04,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242699842] [2021-06-12 19:24:04,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242699842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772750489] [2021-06-12 19:24:04,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:04,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:24:04,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:04,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:04,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772750489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:04,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:04,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-12 19:24:04,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839318480] [2021-06-12 19:24:04,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:04,235 INFO L87 Difference]: Start difference. First operand 7608 states and 23929 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:04,536 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2021-06-12 19:24:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:04,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:04,546 INFO L225 Difference]: With dead ends: 8242 [2021-06-12 19:24:04,546 INFO L226 Difference]: Without dead ends: 8225 [2021-06-12 19:24:04,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2021-06-12 19:24:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2021-06-12 19:24:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.1537970644543716) internal successors, (24710), 7835 states have internal predecessors, (24710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2021-06-12 19:24:04,642 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2021-06-12 19:24:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:04,642 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2021-06-12 19:24:04,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2021-06-12 19:24:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:04,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:04,693 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:04,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 19:24:04,894 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash -706827265, now seen corresponding path program 289 times [2021-06-12 19:24:04,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:04,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113722557] [2021-06-12 19:24:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:05,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:05,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113722557] [2021-06-12 19:24:05,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113722557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:05,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933212627] [2021-06-12 19:24:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:05,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933212627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:05,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:05,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339936860] [2021-06-12 19:24:05,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:05,285 INFO L87 Difference]: Start difference. First operand 7836 states and 24710 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:05,598 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2021-06-12 19:24:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:05,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:05,610 INFO L225 Difference]: With dead ends: 8244 [2021-06-12 19:24:05,610 INFO L226 Difference]: Without dead ends: 8226 [2021-06-12 19:24:05,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-12 19:24:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2021-06-12 19:24:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 3.1481672025723473) internal successors, (24477), 7775 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2021-06-12 19:24:05,716 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2021-06-12 19:24:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:05,716 INFO L482 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2021-06-12 19:24:05,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2021-06-12 19:24:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:05,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:05,724 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:05,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:05,925 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1508846203, now seen corresponding path program 290 times [2021-06-12 19:24:05,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:05,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308181726] [2021-06-12 19:24:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:06,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:06,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308181726] [2021-06-12 19:24:06,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308181726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:06,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228882556] [2021-06-12 19:24:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:06,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:06,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228882556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:06,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:06,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:06,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129919433] [2021-06-12 19:24:06,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:06,238 INFO L87 Difference]: Start difference. First operand 7776 states and 24477 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:06,588 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2021-06-12 19:24:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:06,599 INFO L225 Difference]: With dead ends: 8185 [2021-06-12 19:24:06,599 INFO L226 Difference]: Without dead ends: 8163 [2021-06-12 19:24:06,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-06-12 19:24:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2021-06-12 19:24:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.145438121047877) internal successors, (24374), 7749 states have internal predecessors, (24374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2021-06-12 19:24:06,700 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2021-06-12 19:24:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:06,700 INFO L482 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2021-06-12 19:24:06,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2021-06-12 19:24:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:06,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:06,708 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:06,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:06,909 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1475246975, now seen corresponding path program 291 times [2021-06-12 19:24:06,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:06,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778623450] [2021-06-12 19:24:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:07,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:07,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778623450] [2021-06-12 19:24:07,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778623450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:07,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426209781] [2021-06-12 19:24:07,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:07,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:24:07,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:07,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426209781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:07,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:07,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:07,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601024355] [2021-06-12 19:24:07,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:07,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:07,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:07,301 INFO L87 Difference]: Start difference. First operand 7750 states and 24374 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:07,705 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2021-06-12 19:24:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:24:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:07,716 INFO L225 Difference]: With dead ends: 8091 [2021-06-12 19:24:07,716 INFO L226 Difference]: Without dead ends: 8065 [2021-06-12 19:24:07,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-06-12 19:24:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2021-06-12 19:24:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-06-12 19:24:07,816 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-06-12 19:24:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:07,816 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-06-12 19:24:07,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-06-12 19:24:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:07,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:07,824 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:08,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:08,025 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash 433670907, now seen corresponding path program 292 times [2021-06-12 19:24:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:08,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074301352] [2021-06-12 19:24:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074301352] [2021-06-12 19:24:08,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074301352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183887652] [2021-06-12 19:24:08,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:08,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:08,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183887652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:08,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:08,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:08,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104185874] [2021-06-12 19:24:08,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:08,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:08,346 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:08,672 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2021-06-12 19:24:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:08,683 INFO L225 Difference]: With dead ends: 7972 [2021-06-12 19:24:08,683 INFO L226 Difference]: Without dead ends: 7965 [2021-06-12 19:24:08,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-06-12 19:24:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2021-06-12 19:24:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-06-12 19:24:08,786 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-06-12 19:24:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:08,787 INFO L482 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-06-12 19:24:08,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-06-12 19:24:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:08,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:08,795 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:08,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-12 19:24:08,995 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -906289319, now seen corresponding path program 293 times [2021-06-12 19:24:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:08,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969716899] [2021-06-12 19:24:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:09,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969716899] [2021-06-12 19:24:09,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969716899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586499924] [2021-06-12 19:24:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:09,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:24:09,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:09,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:09,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586499924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:09,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:09,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:24:09,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183432672] [2021-06-12 19:24:09,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:09,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:09,327 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:09,592 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2021-06-12 19:24:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:24:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:09,601 INFO L225 Difference]: With dead ends: 7915 [2021-06-12 19:24:09,601 INFO L226 Difference]: Without dead ends: 7902 [2021-06-12 19:24:09,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-06-12 19:24:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2021-06-12 19:24:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.1418375291980274) internal successors, (24211), 7706 states have internal predecessors, (24211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2021-06-12 19:24:09,694 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2021-06-12 19:24:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:09,694 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2021-06-12 19:24:09,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2021-06-12 19:24:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:09,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:09,702 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:09,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-12 19:24:09,902 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2125386177, now seen corresponding path program 294 times [2021-06-12 19:24:09,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:09,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165446250] [2021-06-12 19:24:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:10,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165446250] [2021-06-12 19:24:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165446250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558346170] [2021-06-12 19:24:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:10,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:24:10,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:10,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558346170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:10,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:10,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-12 19:24:10,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741718035] [2021-06-12 19:24:10,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:10,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:10,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:10,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:10,229 INFO L87 Difference]: Start difference. First operand 7707 states and 24211 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:10,582 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2021-06-12 19:24:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:10,593 INFO L225 Difference]: With dead ends: 8283 [2021-06-12 19:24:10,593 INFO L226 Difference]: Without dead ends: 8266 [2021-06-12 19:24:10,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2021-06-12 19:24:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2021-06-12 19:24:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.1479192938209333) internal successors, (24963), 7930 states have internal predecessors, (24963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2021-06-12 19:24:10,698 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2021-06-12 19:24:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:10,698 INFO L482 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2021-06-12 19:24:10,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2021-06-12 19:24:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:10,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:10,707 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:10,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:10,907 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:10,908 INFO L82 PathProgramCache]: Analyzing trace with hash -510683453, now seen corresponding path program 295 times [2021-06-12 19:24:10,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:10,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032009939] [2021-06-12 19:24:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:11,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032009939] [2021-06-12 19:24:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032009939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227640428] [2021-06-12 19:24:11,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:11,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227640428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:11,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:11,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:11,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604237680] [2021-06-12 19:24:11,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:11,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:11,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:11,226 INFO L87 Difference]: Start difference. First operand 7931 states and 24963 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:11,585 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2021-06-12 19:24:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:11,594 INFO L225 Difference]: With dead ends: 8281 [2021-06-12 19:24:11,595 INFO L226 Difference]: Without dead ends: 8263 [2021-06-12 19:24:11,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-06-12 19:24:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2021-06-12 19:24:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 3.1434384537131232) internal successors, (24720), 7864 states have internal predecessors, (24720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2021-06-12 19:24:11,724 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2021-06-12 19:24:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:11,724 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2021-06-12 19:24:11,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2021-06-12 19:24:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:11,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:11,732 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:11,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-12 19:24:11,933 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1704990015, now seen corresponding path program 296 times [2021-06-12 19:24:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:11,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029094055] [2021-06-12 19:24:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:12,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:12,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029094055] [2021-06-12 19:24:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029094055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:12,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093791778] [2021-06-12 19:24:12,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:12,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:12,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093791778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:12,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:12,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:12,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807425234] [2021-06-12 19:24:12,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:12,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:12,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:12,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:12,224 INFO L87 Difference]: Start difference. First operand 7865 states and 24720 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:12,614 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2021-06-12 19:24:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:24:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:12,624 INFO L225 Difference]: With dead ends: 8238 [2021-06-12 19:24:12,624 INFO L226 Difference]: Without dead ends: 8216 [2021-06-12 19:24:12,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-06-12 19:24:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2021-06-12 19:24:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7839 states have (on average 3.1408342900880215) internal successors, (24621), 7839 states have internal predecessors, (24621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2021-06-12 19:24:12,724 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2021-06-12 19:24:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:12,724 INFO L482 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2021-06-12 19:24:12,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2021-06-12 19:24:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:12,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:12,732 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:12,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-12 19:24:12,932 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1671390787, now seen corresponding path program 297 times [2021-06-12 19:24:12,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:12,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802185054] [2021-06-12 19:24:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:13,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:13,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802185054] [2021-06-12 19:24:13,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802185054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:13,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878895728] [2021-06-12 19:24:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:13,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:24:13,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:13,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:13,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878895728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:13,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:13,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:13,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893462391] [2021-06-12 19:24:13,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:13,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:13,233 INFO L87 Difference]: Start difference. First operand 7840 states and 24621 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:13,639 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2021-06-12 19:24:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:13,650 INFO L225 Difference]: With dead ends: 8244 [2021-06-12 19:24:13,650 INFO L226 Difference]: Without dead ends: 8218 [2021-06-12 19:24:13,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2021-06-12 19:24:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2021-06-12 19:24:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 7815 states have (on average 3.1396033269353807) internal successors, (24536), 7815 states have internal predecessors, (24536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2021-06-12 19:24:13,748 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2021-06-12 19:24:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:13,748 INFO L482 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2021-06-12 19:24:13,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2021-06-12 19:24:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:13,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:13,756 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:13,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:13,956 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash 629814719, now seen corresponding path program 298 times [2021-06-12 19:24:13,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:13,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399100594] [2021-06-12 19:24:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:14,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:14,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399100594] [2021-06-12 19:24:14,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399100594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:14,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169480295] [2021-06-12 19:24:14,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:14,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:14,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169480295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:14,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:14,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:14,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134222737] [2021-06-12 19:24:14,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:14,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:14,317 INFO L87 Difference]: Start difference. First operand 7816 states and 24536 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:14,762 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2021-06-12 19:24:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:14,772 INFO L225 Difference]: With dead ends: 8147 [2021-06-12 19:24:14,772 INFO L226 Difference]: Without dead ends: 8117 [2021-06-12 19:24:14,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:24:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-12 19:24:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2021-06-12 19:24:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 3.1395945599178856) internal successors, (24470), 7794 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2021-06-12 19:24:14,870 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2021-06-12 19:24:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:14,870 INFO L482 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2021-06-12 19:24:14,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2021-06-12 19:24:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:14,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:14,878 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:15,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:15,079 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1594272317, now seen corresponding path program 299 times [2021-06-12 19:24:15,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:15,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736830321] [2021-06-12 19:24:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:15,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:15,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736830321] [2021-06-12 19:24:15,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736830321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:15,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703796298] [2021-06-12 19:24:15,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:15,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:24:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:15,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:15,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703796298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:15,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:15,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085070461] [2021-06-12 19:24:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:15,397 INFO L87 Difference]: Start difference. First operand 7795 states and 24470 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:15,804 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2021-06-12 19:24:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:15,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:15,814 INFO L225 Difference]: With dead ends: 8028 [2021-06-12 19:24:15,814 INFO L226 Difference]: Without dead ends: 8021 [2021-06-12 19:24:15,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2021-06-12 19:24:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2021-06-12 19:24:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 7796 states have (on average 3.1391739353514625) internal successors, (24473), 7796 states have internal predecessors, (24473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2021-06-12 19:24:15,911 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2021-06-12 19:24:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:15,911 INFO L482 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2021-06-12 19:24:15,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2021-06-12 19:24:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:15,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:15,920 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:16,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 19:24:16,120 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash 979797397, now seen corresponding path program 300 times [2021-06-12 19:24:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459322024] [2021-06-12 19:24:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:16,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:16,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459322024] [2021-06-12 19:24:16,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459322024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:16,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909774317] [2021-06-12 19:24:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:16,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:24:16,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:16,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909774317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:16,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:16,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:24:16,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76020355] [2021-06-12 19:24:16,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:16,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:16,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:16,472 INFO L87 Difference]: Start difference. First operand 7797 states and 24473 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:16,697 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2021-06-12 19:24:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:24:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:16,707 INFO L225 Difference]: With dead ends: 7916 [2021-06-12 19:24:16,707 INFO L226 Difference]: Without dead ends: 7903 [2021-06-12 19:24:16,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2021-06-12 19:24:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2021-06-12 19:24:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 3.139475038600103) internal successors, (24400), 7772 states have internal predecessors, (24400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2021-06-12 19:24:16,803 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2021-06-12 19:24:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:16,803 INFO L482 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2021-06-12 19:24:16,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2021-06-12 19:24:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:16,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:16,811 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:17,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-12 19:24:17,012 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -339895301, now seen corresponding path program 301 times [2021-06-12 19:24:17,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:17,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76947674] [2021-06-12 19:24:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:17,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:17,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76947674] [2021-06-12 19:24:17,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76947674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:17,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725941026] [2021-06-12 19:24:17,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:17,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725941026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:17,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:17,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-12 19:24:17,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861645611] [2021-06-12 19:24:17,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:17,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:17,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:17,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:17,351 INFO L87 Difference]: Start difference. First operand 7773 states and 24400 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:17,701 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2021-06-12 19:24:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:24:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:17,711 INFO L225 Difference]: With dead ends: 8383 [2021-06-12 19:24:17,712 INFO L226 Difference]: Without dead ends: 8366 [2021-06-12 19:24:17,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2021-06-12 19:24:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2021-06-12 19:24:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.1385034687809714) internal successors, (25334), 8072 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2021-06-12 19:24:17,813 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2021-06-12 19:24:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:17,814 INFO L482 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2021-06-12 19:24:17,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2021-06-12 19:24:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:17,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:17,822 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:18,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-06-12 19:24:18,022 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1274807423, now seen corresponding path program 302 times [2021-06-12 19:24:18,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:18,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729859641] [2021-06-12 19:24:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:18,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729859641] [2021-06-12 19:24:18,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729859641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618790965] [2021-06-12 19:24:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:18,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618790965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:18,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:18,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:24:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385448032] [2021-06-12 19:24:18,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:18,328 INFO L87 Difference]: Start difference. First operand 8073 states and 25334 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:18,681 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2021-06-12 19:24:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:24:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:18,691 INFO L225 Difference]: With dead ends: 8381 [2021-06-12 19:24:18,691 INFO L226 Difference]: Without dead ends: 8365 [2021-06-12 19:24:18,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-06-12 19:24:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2021-06-12 19:24:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.134526917816735) internal successors, (25211), 8043 states have internal predecessors, (25211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2021-06-12 19:24:18,790 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2021-06-12 19:24:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:18,790 INFO L482 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2021-06-12 19:24:18,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2021-06-12 19:24:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:18,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:18,799 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:18,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 19:24:18,999 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash -804486405, now seen corresponding path program 303 times [2021-06-12 19:24:19,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:19,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632814419] [2021-06-12 19:24:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:19,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:19,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632814419] [2021-06-12 19:24:19,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632814419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:19,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746809054] [2021-06-12 19:24:19,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:19,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:24:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:19,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746809054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:19,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:19,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:24:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931096335] [2021-06-12 19:24:19,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:19,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:19,307 INFO L87 Difference]: Start difference. First operand 8044 states and 25211 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:19,677 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2021-06-12 19:24:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:19,688 INFO L225 Difference]: With dead ends: 8378 [2021-06-12 19:24:19,688 INFO L226 Difference]: Without dead ends: 8360 [2021-06-12 19:24:19,688 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-06-12 19:24:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2021-06-12 19:24:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 3.129511677282378) internal successors, (25058), 8007 states have internal predecessors, (25058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2021-06-12 19:24:19,790 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2021-06-12 19:24:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:19,790 INFO L482 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2021-06-12 19:24:19,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2021-06-12 19:24:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:19,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:19,799 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:19,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-12 19:24:19,999 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:19,999 INFO L82 PathProgramCache]: Analyzing trace with hash -838085633, now seen corresponding path program 304 times [2021-06-12 19:24:19,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:19,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350860346] [2021-06-12 19:24:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:20,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:20,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350860346] [2021-06-12 19:24:20,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350860346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:20,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854672338] [2021-06-12 19:24:20,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:20,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:20,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:20,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854672338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:20,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:20,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:24:20,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584402745] [2021-06-12 19:24:20,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:20,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:20,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:20,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:20,307 INFO L87 Difference]: Start difference. First operand 8008 states and 25058 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:20,733 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2021-06-12 19:24:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:20,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:20,745 INFO L225 Difference]: With dead ends: 8369 [2021-06-12 19:24:20,745 INFO L226 Difference]: Without dead ends: 8349 [2021-06-12 19:24:20,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-06-12 19:24:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2021-06-12 19:24:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 3.126585457742057) internal successors, (24897), 7963 states have internal predecessors, (24897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2021-06-12 19:24:20,877 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2021-06-12 19:24:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:20,878 INFO L482 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2021-06-12 19:24:20,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2021-06-12 19:24:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:20,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:20,886 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:21,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-12 19:24:21,086 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1879661701, now seen corresponding path program 305 times [2021-06-12 19:24:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:21,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069975270] [2021-06-12 19:24:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:21,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:21,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069975270] [2021-06-12 19:24:21,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069975270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:21,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570329121] [2021-06-12 19:24:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:21,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:24:21,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:21,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570329121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:21,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:21,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:24:21,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986399446] [2021-06-12 19:24:21,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:21,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:21,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:21,431 INFO L87 Difference]: Start difference. First operand 7964 states and 24897 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:21,884 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2021-06-12 19:24:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:24:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:21,895 INFO L225 Difference]: With dead ends: 8358 [2021-06-12 19:24:21,895 INFO L226 Difference]: Without dead ends: 8336 [2021-06-12 19:24:21,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:24:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-06-12 19:24:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2021-06-12 19:24:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7921 states have (on average 3.1249842191642467) internal successors, (24753), 7921 states have internal predecessors, (24753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2021-06-12 19:24:22,010 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2021-06-12 19:24:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:22,010 INFO L482 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2021-06-12 19:24:22,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2021-06-12 19:24:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:22,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:22,020 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:22,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:22,221 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 191218559, now seen corresponding path program 306 times [2021-06-12 19:24:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:22,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132800188] [2021-06-12 19:24:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:22,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:22,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132800188] [2021-06-12 19:24:22,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132800188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:22,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762986970] [2021-06-12 19:24:22,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:22,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:24:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:22,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762986970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:22,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:22,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:24:22,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298869255] [2021-06-12 19:24:22,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:22,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:22,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:22,547 INFO L87 Difference]: Start difference. First operand 7922 states and 24753 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:23,037 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2021-06-12 19:24:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:24:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:23,048 INFO L225 Difference]: With dead ends: 8208 [2021-06-12 19:24:23,048 INFO L226 Difference]: Without dead ends: 8184 [2021-06-12 19:24:23,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:24:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-06-12 19:24:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2021-06-12 19:24:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 3.1266497461928933) internal successors, (24638), 7880 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2021-06-12 19:24:23,179 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2021-06-12 19:24:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:23,179 INFO L482 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2021-06-12 19:24:23,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2021-06-12 19:24:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:23,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:23,187 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:23,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-12 19:24:23,387 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash -36002821, now seen corresponding path program 307 times [2021-06-12 19:24:23,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:23,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972858934] [2021-06-12 19:24:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:23,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972858934] [2021-06-12 19:24:23,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972858934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555784430] [2021-06-12 19:24:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:23,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555784430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:23,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:23,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:24:23,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145926227] [2021-06-12 19:24:23,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:23,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:23,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:23,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:23,702 INFO L87 Difference]: Start difference. First operand 7881 states and 24638 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:24,191 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2021-06-12 19:24:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:24:24,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:24,201 INFO L225 Difference]: With dead ends: 8087 [2021-06-12 19:24:24,201 INFO L226 Difference]: Without dead ends: 8080 [2021-06-12 19:24:24,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:24:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-06-12 19:24:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2021-06-12 19:24:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 3.124176381145464) internal successors, (24656), 7892 states have internal predecessors, (24656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2021-06-12 19:24:24,298 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2021-06-12 19:24:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:24,298 INFO L482 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2021-06-12 19:24:24,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2021-06-12 19:24:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:24,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:24,307 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:24,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:24,507 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1252511357, now seen corresponding path program 308 times [2021-06-12 19:24:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:24,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551855766] [2021-06-12 19:24:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:24,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:24,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551855766] [2021-06-12 19:24:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551855766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:24,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720688845] [2021-06-12 19:24:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:24,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:24,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720688845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:24,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:24,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 19:24:24,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739100548] [2021-06-12 19:24:24,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:24,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:24,869 INFO L87 Difference]: Start difference. First operand 7893 states and 24656 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:25,112 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2021-06-12 19:24:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:24:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:25,122 INFO L225 Difference]: With dead ends: 8261 [2021-06-12 19:24:25,122 INFO L226 Difference]: Without dead ends: 8251 [2021-06-12 19:24:25,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-12 19:24:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2021-06-12 19:24:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7952 states have (on average 3.1281438631790746) internal successors, (24875), 7952 states have internal predecessors, (24875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2021-06-12 19:24:25,269 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2021-06-12 19:24:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2021-06-12 19:24:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2021-06-12 19:24:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:25,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:25,278 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:25,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-06-12 19:24:25,478 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash 362191367, now seen corresponding path program 309 times [2021-06-12 19:24:25,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:25,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71183307] [2021-06-12 19:24:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:25,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:25,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71183307] [2021-06-12 19:24:25,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71183307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:25,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183445766] [2021-06-12 19:24:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:25,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:24:25,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:25,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:25,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:25,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183445766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:25,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:25,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:24:25,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837582337] [2021-06-12 19:24:25,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:25,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:25,832 INFO L87 Difference]: Start difference. First operand 7953 states and 24875 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:26,066 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2021-06-12 19:24:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:24:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:26,076 INFO L225 Difference]: With dead ends: 8243 [2021-06-12 19:24:26,076 INFO L226 Difference]: Without dead ends: 8236 [2021-06-12 19:24:26,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-06-12 19:24:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2021-06-12 19:24:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.127924528301887) internal successors, (24867), 7950 states have internal predecessors, (24867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2021-06-12 19:24:26,176 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2021-06-12 19:24:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:26,176 INFO L482 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2021-06-12 19:24:26,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2021-06-12 19:24:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:26,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:26,184 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:26,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-12 19:24:26,385 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash -681056551, now seen corresponding path program 310 times [2021-06-12 19:24:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:26,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367095153] [2021-06-12 19:24:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:26,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:26,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367095153] [2021-06-12 19:24:26,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367095153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:26,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113941747] [2021-06-12 19:24:26,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:26,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:26,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:26,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:26,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113941747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:26,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:26,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 19:24:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429513979] [2021-06-12 19:24:26,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:26,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:26,735 INFO L87 Difference]: Start difference. First operand 7951 states and 24867 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:26,981 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2021-06-12 19:24:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:24:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:26,994 INFO L225 Difference]: With dead ends: 8146 [2021-06-12 19:24:26,994 INFO L226 Difference]: Without dead ends: 8139 [2021-06-12 19:24:26,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2021-06-12 19:24:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2021-06-12 19:24:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.127940621461819) internal successors, (24864), 7949 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2021-06-12 19:24:27,098 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2021-06-12 19:24:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:27,098 INFO L482 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2021-06-12 19:24:27,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2021-06-12 19:24:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:27,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:27,106 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:27,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-12 19:24:27,307 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 521161979, now seen corresponding path program 311 times [2021-06-12 19:24:27,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:27,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356638549] [2021-06-12 19:24:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:27,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356638549] [2021-06-12 19:24:27,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356638549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390429659] [2021-06-12 19:24:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:27,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:24:27,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:27,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390429659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:27,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:27,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:27,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090265367] [2021-06-12 19:24:27,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:27,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:27,694 INFO L87 Difference]: Start difference. First operand 7950 states and 24864 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:27,941 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2021-06-12 19:24:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:27,951 INFO L225 Difference]: With dead ends: 8403 [2021-06-12 19:24:27,951 INFO L226 Difference]: Without dead ends: 8393 [2021-06-12 19:24:27,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2021-06-12 19:24:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2021-06-12 19:24:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.133034937212483) internal successors, (25199), 8043 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2021-06-12 19:24:28,055 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2021-06-12 19:24:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:28,055 INFO L482 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2021-06-12 19:24:28,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2021-06-12 19:24:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:28,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:28,063 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:28,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:28,264 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:28,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2135864703, now seen corresponding path program 312 times [2021-06-12 19:24:28,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:28,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148688907] [2021-06-12 19:24:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:28,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:28,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148688907] [2021-06-12 19:24:28,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148688907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:28,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851300676] [2021-06-12 19:24:28,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:28,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:24:28,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:28,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:28,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851300676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:28,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:28,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-12 19:24:28,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658177749] [2021-06-12 19:24:28,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:28,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:28,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:28,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:28,609 INFO L87 Difference]: Start difference. First operand 8044 states and 25199 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:28,852 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2021-06-12 19:24:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:28,862 INFO L225 Difference]: With dead ends: 8384 [2021-06-12 19:24:28,862 INFO L226 Difference]: Without dead ends: 8377 [2021-06-12 19:24:28,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-06-12 19:24:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2021-06-12 19:24:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 3.1327114427860696) internal successors, (25187), 8040 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2021-06-12 19:24:28,964 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2021-06-12 19:24:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:28,964 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2021-06-12 19:24:28,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2021-06-12 19:24:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:28,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:28,973 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:29,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:29,173 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:29,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:29,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1092616785, now seen corresponding path program 313 times [2021-06-12 19:24:29,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:29,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408473850] [2021-06-12 19:24:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:29,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408473850] [2021-06-12 19:24:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408473850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:29,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425452219] [2021-06-12 19:24:29,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:29,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425452219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:29,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:29,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:29,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410341558] [2021-06-12 19:24:29,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:29,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:29,519 INFO L87 Difference]: Start difference. First operand 8041 states and 25187 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:29,848 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2021-06-12 19:24:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:29,858 INFO L225 Difference]: With dead ends: 8323 [2021-06-12 19:24:29,858 INFO L226 Difference]: Without dead ends: 8310 [2021-06-12 19:24:29,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2021-06-12 19:24:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2021-06-12 19:24:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.131775236200895) internal successors, (25192), 8044 states have internal predecessors, (25192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2021-06-12 19:24:29,952 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2021-06-12 19:24:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:29,952 INFO L482 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2021-06-12 19:24:29,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2021-06-12 19:24:29,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:29,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:29,960 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:30,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-12 19:24:30,161 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:30,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1627846587, now seen corresponding path program 314 times [2021-06-12 19:24:30,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:30,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873579485] [2021-06-12 19:24:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:30,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:30,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873579485] [2021-06-12 19:24:30,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873579485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:30,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205664541] [2021-06-12 19:24:30,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:30,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:30,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205664541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:30,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:30,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:30,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446033896] [2021-06-12 19:24:30,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:30,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:30,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:30,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:30,610 INFO L87 Difference]: Start difference. First operand 8045 states and 25192 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:30,925 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2021-06-12 19:24:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:30,935 INFO L225 Difference]: With dead ends: 8231 [2021-06-12 19:24:30,936 INFO L226 Difference]: Without dead ends: 8224 [2021-06-12 19:24:30,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-06-12 19:24:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2021-06-12 19:24:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8043 states, 8042 states have (on average 3.1318080079582193) internal successors, (25186), 8042 states have internal predecessors, (25186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2021-06-12 19:24:31,038 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2021-06-12 19:24:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:31,038 INFO L482 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2021-06-12 19:24:31,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2021-06-12 19:24:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:31,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:31,046 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:31,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:31,247 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash -108653125, now seen corresponding path program 315 times [2021-06-12 19:24:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:31,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924460927] [2021-06-12 19:24:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:31,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:31,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924460927] [2021-06-12 19:24:31,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924460927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:31,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408663162] [2021-06-12 19:24:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:31,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:24:31,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:31,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:31,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:31,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408663162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:31,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:31,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346159445] [2021-06-12 19:24:31,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:31,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:31,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:31,579 INFO L87 Difference]: Start difference. First operand 8043 states and 25186 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:31,831 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2021-06-12 19:24:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:24:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:31,841 INFO L225 Difference]: With dead ends: 8179 [2021-06-12 19:24:31,841 INFO L226 Difference]: Without dead ends: 8163 [2021-06-12 19:24:31,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-06-12 19:24:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2021-06-12 19:24:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.132153098117442) internal successors, (25123), 8021 states have internal predecessors, (25123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2021-06-12 19:24:31,988 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2021-06-12 19:24:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:31,988 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2021-06-12 19:24:31,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2021-06-12 19:24:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:31,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:31,996 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:32,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:32,197 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash -329539453, now seen corresponding path program 316 times [2021-06-12 19:24:32,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:32,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278138777] [2021-06-12 19:24:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:32,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:32,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278138777] [2021-06-12 19:24:32,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278138777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:32,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604443923] [2021-06-12 19:24:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:32,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:32,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:32,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:32,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604443923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:32,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:32,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:32,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032779145] [2021-06-12 19:24:32,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:32,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:32,518 INFO L87 Difference]: Start difference. First operand 8022 states and 25123 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:32,779 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2021-06-12 19:24:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:32,790 INFO L225 Difference]: With dead ends: 8489 [2021-06-12 19:24:32,790 INFO L226 Difference]: Without dead ends: 8479 [2021-06-12 19:24:32,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2021-06-12 19:24:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2021-06-12 19:24:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.1368952357503384) internal successors, (25481), 8123 states have internal predecessors, (25481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2021-06-12 19:24:32,900 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2021-06-12 19:24:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:32,900 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2021-06-12 19:24:32,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2021-06-12 19:24:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:32,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:32,909 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:33,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:33,109 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:33,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1285163271, now seen corresponding path program 317 times [2021-06-12 19:24:33,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:33,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105728157] [2021-06-12 19:24:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:33,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105728157] [2021-06-12 19:24:33,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105728157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:33,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787296731] [2021-06-12 19:24:33,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:33,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:24:33,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:33,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787296731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:33,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:33,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-12 19:24:33,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024331738] [2021-06-12 19:24:33,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:33,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:33,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:33,448 INFO L87 Difference]: Start difference. First operand 8124 states and 25481 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:33,718 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2021-06-12 19:24:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:33,728 INFO L225 Difference]: With dead ends: 8470 [2021-06-12 19:24:33,728 INFO L226 Difference]: Without dead ends: 8463 [2021-06-12 19:24:33,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2021-06-12 19:24:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2021-06-12 19:24:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.1364700086217514) internal successors, (25465), 8119 states have internal predecessors, (25465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2021-06-12 19:24:33,827 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2021-06-12 19:24:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:33,827 INFO L482 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2021-06-12 19:24:33,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2021-06-12 19:24:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:33,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:33,836 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:34,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-12 19:24:34,036 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash 241915353, now seen corresponding path program 318 times [2021-06-12 19:24:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:34,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982098018] [2021-06-12 19:24:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:34,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:34,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982098018] [2021-06-12 19:24:34,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982098018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:34,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146705435] [2021-06-12 19:24:34,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:34,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:24:34,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:34,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:34,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146705435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:34,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:34,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:34,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109904590] [2021-06-12 19:24:34,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:34,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:34,414 INFO L87 Difference]: Start difference. First operand 8120 states and 25465 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:34,711 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2021-06-12 19:24:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:34,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:34,721 INFO L225 Difference]: With dead ends: 8466 [2021-06-12 19:24:34,721 INFO L226 Difference]: Without dead ends: 8453 [2021-06-12 19:24:34,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-06-12 19:24:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2021-06-12 19:24:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.13590438639724) internal successors, (25451), 8116 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2021-06-12 19:24:34,824 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2021-06-12 19:24:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:34,824 INFO L482 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2021-06-12 19:24:34,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2021-06-12 19:24:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:34,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:34,833 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:35,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-12 19:24:35,033 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash 777145155, now seen corresponding path program 319 times [2021-06-12 19:24:35,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:35,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77258768] [2021-06-12 19:24:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:35,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:35,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77258768] [2021-06-12 19:24:35,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77258768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:35,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213482188] [2021-06-12 19:24:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:35,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213482188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:35,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:35,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:35,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894083447] [2021-06-12 19:24:35,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:35,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:35,332 INFO L87 Difference]: Start difference. First operand 8117 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:35,672 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2021-06-12 19:24:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:35,683 INFO L225 Difference]: With dead ends: 8405 [2021-06-12 19:24:35,684 INFO L226 Difference]: Without dead ends: 8389 [2021-06-12 19:24:35,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2021-06-12 19:24:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2021-06-12 19:24:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.134745658332307) internal successors, (25451), 8119 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2021-06-12 19:24:35,785 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2021-06-12 19:24:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:35,785 INFO L482 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2021-06-12 19:24:35,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2021-06-12 19:24:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:35,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:35,794 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:35,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:35,994 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash 189399833, now seen corresponding path program 320 times [2021-06-12 19:24:35,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:35,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513110628] [2021-06-12 19:24:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513110628] [2021-06-12 19:24:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513110628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100722321] [2021-06-12 19:24:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:36,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:36,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:36,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100722321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:36,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:36,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:36,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892583612] [2021-06-12 19:24:36,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:36,314 INFO L87 Difference]: Start difference. First operand 8120 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:36,664 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2021-06-12 19:24:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:36,674 INFO L225 Difference]: With dead ends: 8334 [2021-06-12 19:24:36,674 INFO L226 Difference]: Without dead ends: 8327 [2021-06-12 19:24:36,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-06-12 19:24:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2021-06-12 19:24:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.1347954657466732) internal successors, (25442), 8116 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2021-06-12 19:24:36,778 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2021-06-12 19:24:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:36,778 INFO L482 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2021-06-12 19:24:36,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2021-06-12 19:24:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:36,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:36,787 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:36,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-12 19:24:36,988 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1894430651, now seen corresponding path program 321 times [2021-06-12 19:24:36,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:36,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820063534] [2021-06-12 19:24:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:37,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:37,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820063534] [2021-06-12 19:24:37,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820063534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:37,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848460164] [2021-06-12 19:24:37,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:37,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:24:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:37,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:37,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848460164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:37,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:37,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-12 19:24:37,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200435215] [2021-06-12 19:24:37,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:37,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:37,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:37,435 INFO L87 Difference]: Start difference. First operand 8117 states and 25442 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:37,709 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2021-06-12 19:24:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:24:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:37,719 INFO L225 Difference]: With dead ends: 8376 [2021-06-12 19:24:37,719 INFO L226 Difference]: Without dead ends: 8360 [2021-06-12 19:24:37,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-06-12 19:24:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2021-06-12 19:24:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8101 states, 8100 states have (on average 3.1339506172839506) internal successors, (25385), 8100 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2021-06-12 19:24:37,827 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2021-06-12 19:24:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:37,827 INFO L482 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2021-06-12 19:24:37,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2021-06-12 19:24:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:37,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:37,835 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:38,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 19:24:38,037 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2102483687, now seen corresponding path program 322 times [2021-06-12 19:24:38,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:38,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133955296] [2021-06-12 19:24:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:38,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:38,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133955296] [2021-06-12 19:24:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133955296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:38,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799545374] [2021-06-12 19:24:38,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:38,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:38,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:38,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799545374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:38,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:38,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 19:24:38,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284452079] [2021-06-12 19:24:38,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:38,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:38,339 INFO L87 Difference]: Start difference. First operand 8101 states and 25385 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:38,641 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2021-06-12 19:24:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:24:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:38,651 INFO L225 Difference]: With dead ends: 8270 [2021-06-12 19:24:38,651 INFO L226 Difference]: Without dead ends: 8251 [2021-06-12 19:24:38,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-12 19:24:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2021-06-12 19:24:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 3.13421573478476) internal successors, (25337), 8084 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2021-06-12 19:24:38,784 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2021-06-12 19:24:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:38,784 INFO L482 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2021-06-12 19:24:38,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2021-06-12 19:24:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:38,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:38,792 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:38,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-12 19:24:38,993 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -931480069, now seen corresponding path program 323 times [2021-06-12 19:24:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:38,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938073642] [2021-06-12 19:24:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:39,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938073642] [2021-06-12 19:24:39,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938073642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116186510] [2021-06-12 19:24:39,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:39,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:24:39,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:39,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116186510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:39,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:39,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:39,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685393869] [2021-06-12 19:24:39,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:39,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:39,311 INFO L87 Difference]: Start difference. First operand 8085 states and 25337 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:39,570 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2021-06-12 19:24:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:39,581 INFO L225 Difference]: With dead ends: 8595 [2021-06-12 19:24:39,581 INFO L226 Difference]: Without dead ends: 8585 [2021-06-12 19:24:39,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-06-12 19:24:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2021-06-12 19:24:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 3.1383863080684598) internal successors, (25672), 8180 states have internal predecessors, (25672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2021-06-12 19:24:39,690 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2021-06-12 19:24:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:39,690 INFO L482 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2021-06-12 19:24:39,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2021-06-12 19:24:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:39,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:39,699 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:39,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:39,900 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash 683222655, now seen corresponding path program 324 times [2021-06-12 19:24:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:39,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70862006] [2021-06-12 19:24:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:40,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:40,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70862006] [2021-06-12 19:24:40,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70862006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:40,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794726918] [2021-06-12 19:24:40,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:40,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:24:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:40,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794726918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:40,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:40,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-12 19:24:40,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343130159] [2021-06-12 19:24:40,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:40,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:40,264 INFO L87 Difference]: Start difference. First operand 8181 states and 25672 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:40,564 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2021-06-12 19:24:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:40,575 INFO L225 Difference]: With dead ends: 8579 [2021-06-12 19:24:40,575 INFO L226 Difference]: Without dead ends: 8572 [2021-06-12 19:24:40,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2021-06-12 19:24:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2021-06-12 19:24:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 3.138082996694822) internal successors, (25635), 8169 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2021-06-12 19:24:40,682 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2021-06-12 19:24:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:40,682 INFO L482 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2021-06-12 19:24:40,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2021-06-12 19:24:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:40,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:40,690 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:40,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:40,891 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash -360025263, now seen corresponding path program 325 times [2021-06-12 19:24:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:40,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398536205] [2021-06-12 19:24:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:41,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:41,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398536205] [2021-06-12 19:24:41,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398536205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:41,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046961715] [2021-06-12 19:24:41,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:41,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046961715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:41,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:41,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:41,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649813964] [2021-06-12 19:24:41,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:41,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:41,245 INFO L87 Difference]: Start difference. First operand 8170 states and 25635 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:41,548 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2021-06-12 19:24:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:41,559 INFO L225 Difference]: With dead ends: 8583 [2021-06-12 19:24:41,559 INFO L226 Difference]: Without dead ends: 8570 [2021-06-12 19:24:41,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:24:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-06-12 19:24:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2021-06-12 19:24:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 3.1375382731169625) internal successors, (25618), 8165 states have internal predecessors, (25618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2021-06-12 19:24:41,665 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2021-06-12 19:24:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:41,665 INFO L482 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2021-06-12 19:24:41,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2021-06-12 19:24:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:41,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:41,674 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:41,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-12 19:24:41,874 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash 175204539, now seen corresponding path program 326 times [2021-06-12 19:24:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:41,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137535827] [2021-06-12 19:24:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:42,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137535827] [2021-06-12 19:24:42,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137535827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:42,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986485637] [2021-06-12 19:24:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:42,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:42,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986485637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:42,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:42,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:42,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724210348] [2021-06-12 19:24:42,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:42,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:42,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:42,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:42,173 INFO L87 Difference]: Start difference. First operand 8166 states and 25618 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:42,519 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2021-06-12 19:24:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:24:42,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:42,529 INFO L225 Difference]: With dead ends: 8591 [2021-06-12 19:24:42,530 INFO L226 Difference]: Without dead ends: 8575 [2021-06-12 19:24:42,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-06-12 19:24:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2021-06-12 19:24:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 3.1371155495650043) internal successors, (25602), 8161 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2021-06-12 19:24:42,635 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2021-06-12 19:24:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:42,635 INFO L482 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2021-06-12 19:24:42,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2021-06-12 19:24:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:42,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:42,644 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:42,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-12 19:24:42,844 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -412540783, now seen corresponding path program 327 times [2021-06-12 19:24:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:42,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747748162] [2021-06-12 19:24:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:43,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:43,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747748162] [2021-06-12 19:24:43,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747748162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:43,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22237036] [2021-06-12 19:24:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:43,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:24:43,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:43,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22237036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:43,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:43,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:43,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724340803] [2021-06-12 19:24:43,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:43,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:43,205 INFO L87 Difference]: Start difference. First operand 8162 states and 25602 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:43,607 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2021-06-12 19:24:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:43,618 INFO L225 Difference]: With dead ends: 8522 [2021-06-12 19:24:43,618 INFO L226 Difference]: Without dead ends: 8503 [2021-06-12 19:24:43,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2021-06-12 19:24:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2021-06-12 19:24:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 3.136815005516734) internal successors, (25587), 8157 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2021-06-12 19:24:43,720 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2021-06-12 19:24:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:43,720 INFO L482 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2021-06-12 19:24:43,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2021-06-12 19:24:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:24:43,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:43,728 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:43,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-12 19:24:43,929 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1452776581, now seen corresponding path program 328 times [2021-06-12 19:24:43,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:43,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703933600] [2021-06-12 19:24:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:44,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703933600] [2021-06-12 19:24:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703933600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12809354] [2021-06-12 19:24:44,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:44,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:44,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:44,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:24:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:44,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12809354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:44,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:44,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-06-12 19:24:44,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477905495] [2021-06-12 19:24:44,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:24:44,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:44,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:24:44,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:44,240 INFO L87 Difference]: Start difference. First operand 8158 states and 25587 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:44,596 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2021-06-12 19:24:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 19:24:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:44,607 INFO L225 Difference]: With dead ends: 8435 [2021-06-12 19:24:44,607 INFO L226 Difference]: Without dead ends: 8428 [2021-06-12 19:24:44,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-06-12 19:24:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2021-06-12 19:24:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 3.1368821292775664) internal successors, (25575), 8153 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2021-06-12 19:24:44,708 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2021-06-12 19:24:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:44,708 INFO L482 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2021-06-12 19:24:44,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2021-06-12 19:24:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:44,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:44,716 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:44,917 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 835429403, now seen corresponding path program 329 times [2021-06-12 19:24:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276006172] [2021-06-12 19:24:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:44,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:44,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276006172] [2021-06-12 19:24:44,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276006172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:44,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680891920] [2021-06-12 19:24:44,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:45,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:24:45,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:45,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680891920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:45,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:45,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 19:24:45,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896816050] [2021-06-12 19:24:45,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:45,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:45,122 INFO L87 Difference]: Start difference. First operand 8154 states and 25575 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:45,293 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2021-06-12 19:24:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:24:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:45,306 INFO L225 Difference]: With dead ends: 11007 [2021-06-12 19:24:45,306 INFO L226 Difference]: Without dead ends: 10984 [2021-06-12 19:24:45,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:24:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-12 19:24:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2021-06-12 19:24:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 3.1375797741777123) internal successors, (25565), 8148 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2021-06-12 19:24:45,450 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2021-06-12 19:24:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:45,450 INFO L482 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2021-06-12 19:24:45,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2021-06-12 19:24:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:45,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:45,459 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:45,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-12 19:24:45,659 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2031355403, now seen corresponding path program 330 times [2021-06-12 19:24:45,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:45,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297102986] [2021-06-12 19:24:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:45,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297102986] [2021-06-12 19:24:45,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297102986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242822556] [2021-06-12 19:24:45,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:45,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:24:45,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:45,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242822556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:45,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:45,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 19:24:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282804897] [2021-06-12 19:24:45,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:24:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:45,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:24:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:45,854 INFO L87 Difference]: Start difference. First operand 8149 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:46,001 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2021-06-12 19:24:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:46,014 INFO L225 Difference]: With dead ends: 11150 [2021-06-12 19:24:46,014 INFO L226 Difference]: Without dead ends: 11150 [2021-06-12 19:24:46,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:24:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2021-06-12 19:24:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2021-06-12 19:24:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8242 states have (on average 3.1360106770201406) internal successors, (25847), 8242 states have internal predecessors, (25847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2021-06-12 19:24:46,135 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2021-06-12 19:24:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2021-06-12 19:24:46,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2021-06-12 19:24:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:46,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:46,144 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:46,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:46,344 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:46,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1049828081, now seen corresponding path program 331 times [2021-06-12 19:24:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:46,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950675219] [2021-06-12 19:24:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:46,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950675219] [2021-06-12 19:24:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950675219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495130577] [2021-06-12 19:24:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:46,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495130577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:46,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:46,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:46,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311669966] [2021-06-12 19:24:46,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:46,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:46,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:46,560 INFO L87 Difference]: Start difference. First operand 8243 states and 25847 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:47,371 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2021-06-12 19:24:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 19:24:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:47,387 INFO L225 Difference]: With dead ends: 12726 [2021-06-12 19:24:47,387 INFO L226 Difference]: Without dead ends: 12716 [2021-06-12 19:24:47,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:24:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-06-12 19:24:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2021-06-12 19:24:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.163472614933501) internal successors, (30208), 9549 states have internal predecessors, (30208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2021-06-12 19:24:47,565 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2021-06-12 19:24:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:47,565 INFO L482 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2021-06-12 19:24:47,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2021-06-12 19:24:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:47,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:47,577 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:47,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-12 19:24:47,777 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash -478373275, now seen corresponding path program 332 times [2021-06-12 19:24:47,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:47,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484256885] [2021-06-12 19:24:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:47,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:47,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484256885] [2021-06-12 19:24:47,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484256885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:47,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406626405] [2021-06-12 19:24:47,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:47,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:47,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406626405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:47,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:47,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216469266] [2021-06-12 19:24:47,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:47,992 INFO L87 Difference]: Start difference. First operand 9550 states and 30208 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:48,832 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2021-06-12 19:24:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 19:24:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:48,848 INFO L225 Difference]: With dead ends: 12601 [2021-06-12 19:24:48,848 INFO L226 Difference]: Without dead ends: 12595 [2021-06-12 19:24:48,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 19:24:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-06-12 19:24:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2021-06-12 19:24:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.1354617004766654) internal successors, (28285), 9021 states have internal predecessors, (28285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2021-06-12 19:24:49,022 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2021-06-12 19:24:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:49,022 INFO L482 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2021-06-12 19:24:49,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2021-06-12 19:24:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:49,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:49,032 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:49,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:49,232 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1885022475, now seen corresponding path program 333 times [2021-06-12 19:24:49,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:49,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649308638] [2021-06-12 19:24:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:49,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:49,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649308638] [2021-06-12 19:24:49,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649308638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:49,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498505632] [2021-06-12 19:24:49,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:49,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:24:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:49,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:49,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498505632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:49,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:49,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:49,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811261633] [2021-06-12 19:24:49,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:49,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:49,440 INFO L87 Difference]: Start difference. First operand 9022 states and 28285 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:50,398 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2021-06-12 19:24:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 19:24:50,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:50,411 INFO L225 Difference]: With dead ends: 11076 [2021-06-12 19:24:50,412 INFO L226 Difference]: Without dead ends: 11076 [2021-06-12 19:24:50,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 789.6ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 19:24:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-06-12 19:24:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2021-06-12 19:24:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.1517819706498953) internal successors, (30068), 9540 states have internal predecessors, (30068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2021-06-12 19:24:50,558 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2021-06-12 19:24:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:50,559 INFO L482 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2021-06-12 19:24:50,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2021-06-12 19:24:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:50,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:50,569 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:50,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:50,770 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1420431371, now seen corresponding path program 334 times [2021-06-12 19:24:50,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:50,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266967572] [2021-06-12 19:24:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:50,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:50,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266967572] [2021-06-12 19:24:50,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266967572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:50,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076336401] [2021-06-12 19:24:50,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:50,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:50,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:50,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076336401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:50,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:50,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:50,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247302878] [2021-06-12 19:24:50,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:50,989 INFO L87 Difference]: Start difference. First operand 9541 states and 30068 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:51,942 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2021-06-12 19:24:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:24:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:51,956 INFO L225 Difference]: With dead ends: 10620 [2021-06-12 19:24:51,956 INFO L226 Difference]: Without dead ends: 10616 [2021-06-12 19:24:51,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 819.6ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 19:24:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2021-06-12 19:24:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2021-06-12 19:24:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8586 states have (on average 3.1179827626368506) internal successors, (26771), 8586 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2021-06-12 19:24:52,113 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2021-06-12 19:24:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:52,113 INFO L482 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2021-06-12 19:24:52,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2021-06-12 19:24:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:52,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:52,122 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:52,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-12 19:24:52,322 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash 56856527, now seen corresponding path program 335 times [2021-06-12 19:24:52,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:52,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184015198] [2021-06-12 19:24:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:52,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184015198] [2021-06-12 19:24:52,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184015198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033186356] [2021-06-12 19:24:52,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:52,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:24:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:52,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033186356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:52,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:52,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:52,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738087687] [2021-06-12 19:24:52,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:52,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:52,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:52,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:52,534 INFO L87 Difference]: Start difference. First operand 8587 states and 26771 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:53,292 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2021-06-12 19:24:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 19:24:53,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:53,305 INFO L225 Difference]: With dead ends: 11811 [2021-06-12 19:24:53,306 INFO L226 Difference]: Without dead ends: 11802 [2021-06-12 19:24:53,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:24:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-06-12 19:24:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2021-06-12 19:24:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.118261069052535) internal successors, (27185), 8718 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2021-06-12 19:24:53,438 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2021-06-12 19:24:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:53,438 INFO L482 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2021-06-12 19:24:53,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2021-06-12 19:24:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:53,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:53,447 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:53,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:53,647 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -530888795, now seen corresponding path program 336 times [2021-06-12 19:24:53,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:53,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862243499] [2021-06-12 19:24:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:53,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:53,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862243499] [2021-06-12 19:24:53,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862243499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:53,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619481417] [2021-06-12 19:24:53,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:53,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:24:53,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:53,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619481417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:53,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:53,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:53,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499195925] [2021-06-12 19:24:53,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:53,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:53,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:53,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:53,859 INFO L87 Difference]: Start difference. First operand 8719 states and 27185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:54,567 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2021-06-12 19:24:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:24:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:54,581 INFO L225 Difference]: With dead ends: 11970 [2021-06-12 19:24:54,581 INFO L226 Difference]: Without dead ends: 11958 [2021-06-12 19:24:54,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:24:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2021-06-12 19:24:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2021-06-12 19:24:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 3.1199954504094634) internal successors, (27431), 8792 states have internal predecessors, (27431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2021-06-12 19:24:54,715 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2021-06-12 19:24:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:54,715 INFO L482 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2021-06-12 19:24:54,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2021-06-12 19:24:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:54,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:54,725 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:54,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:54,925 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1571124593, now seen corresponding path program 337 times [2021-06-12 19:24:54,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:54,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503949758] [2021-06-12 19:24:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:54,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:54,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503949758] [2021-06-12 19:24:54,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503949758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:54,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915912113] [2021-06-12 19:24:54,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:55,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915912113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:55,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:55,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452065271] [2021-06-12 19:24:55,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:55,136 INFO L87 Difference]: Start difference. First operand 8793 states and 27431 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:55,728 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2021-06-12 19:24:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:24:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:55,743 INFO L225 Difference]: With dead ends: 12336 [2021-06-12 19:24:55,743 INFO L226 Difference]: Without dead ends: 12321 [2021-06-12 19:24:55,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 19:24:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2021-06-12 19:24:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2021-06-12 19:24:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8831 states have (on average 3.1192390442758464) internal successors, (27546), 8831 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2021-06-12 19:24:55,882 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2021-06-12 19:24:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:55,882 INFO L482 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2021-06-12 19:24:55,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2021-06-12 19:24:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:55,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:55,892 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:56,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-12 19:24:56,097 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash 541304037, now seen corresponding path program 338 times [2021-06-12 19:24:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:56,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057424363] [2021-06-12 19:24:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:56,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:56,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057424363] [2021-06-12 19:24:56,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057424363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:56,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499065477] [2021-06-12 19:24:56,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:56,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:56,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:56,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499065477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:56,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:56,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616418639] [2021-06-12 19:24:56,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:56,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:56,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:56,317 INFO L87 Difference]: Start difference. First operand 8832 states and 27546 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:56,877 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2021-06-12 19:24:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:24:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:56,893 INFO L225 Difference]: With dead ends: 12564 [2021-06-12 19:24:56,893 INFO L226 Difference]: Without dead ends: 12546 [2021-06-12 19:24:56,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 19:24:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2021-06-12 19:24:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2021-06-12 19:24:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.116339426765967) internal successors, (27617), 8862 states have internal predecessors, (27617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2021-06-12 19:24:57,034 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2021-06-12 19:24:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:57,034 INFO L482 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2021-06-12 19:24:57,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2021-06-12 19:24:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:57,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:57,043 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:57,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-12 19:24:57,244 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1602082127, now seen corresponding path program 339 times [2021-06-12 19:24:57,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463625045] [2021-06-12 19:24:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:57,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:57,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463625045] [2021-06-12 19:24:57,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463625045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:57,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362679825] [2021-06-12 19:24:57,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:57,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:24:57,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:57,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:57,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362679825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:57,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:57,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:24:57,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752237709] [2021-06-12 19:24:57,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:57,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:57,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:57,460 INFO L87 Difference]: Start difference. First operand 8863 states and 27617 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:57,835 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2021-06-12 19:24:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:24:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:57,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:57,849 INFO L225 Difference]: With dead ends: 11519 [2021-06-12 19:24:57,849 INFO L226 Difference]: Without dead ends: 11501 [2021-06-12 19:24:57,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:24:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2021-06-12 19:24:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2021-06-12 19:24:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.115662378695554) internal successors, (27611), 8862 states have internal predecessors, (27611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2021-06-12 19:24:57,980 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2021-06-12 19:24:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:57,980 INFO L482 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2021-06-12 19:24:57,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2021-06-12 19:24:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:57,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:57,990 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:58,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-12 19:24:58,191 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 370144463, now seen corresponding path program 340 times [2021-06-12 19:24:58,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:58,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74174811] [2021-06-12 19:24:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:58,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:58,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74174811] [2021-06-12 19:24:58,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74174811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:58,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499710439] [2021-06-12 19:24:58,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:58,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:58,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499710439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:58,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:58,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:24:58,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090045935] [2021-06-12 19:24:58,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:58,394 INFO L87 Difference]: Start difference. First operand 8863 states and 27611 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:59,346 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2021-06-12 19:24:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 19:24:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:24:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:59,358 INFO L225 Difference]: With dead ends: 10540 [2021-06-12 19:24:59,358 INFO L226 Difference]: Without dead ends: 10528 [2021-06-12 19:24:59,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 794.2ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 19:24:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-06-12 19:24:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2021-06-12 19:24:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.1330774152271275) internal successors, (29382), 9378 states have internal predecessors, (29382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2021-06-12 19:24:59,493 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2021-06-12 19:24:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:59,493 INFO L482 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2021-06-12 19:24:59,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2021-06-12 19:24:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:24:59,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:59,503 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:59,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:59,704 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:59,704 INFO L82 PathProgramCache]: Analyzing trace with hash -94446641, now seen corresponding path program 341 times [2021-06-12 19:24:59,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:59,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886284915] [2021-06-12 19:24:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:59,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:59,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886284915] [2021-06-12 19:24:59,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886284915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:59,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980304441] [2021-06-12 19:24:59,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:59,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:24:59,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:24:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980304441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:59,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:59,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:24:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722313025] [2021-06-12 19:24:59,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:24:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:24:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:59,912 INFO L87 Difference]: Start difference. First operand 9379 states and 29382 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:00,967 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2021-06-12 19:25:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:25:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:00,982 INFO L225 Difference]: With dead ends: 10146 [2021-06-12 19:25:00,982 INFO L226 Difference]: Without dead ends: 10136 [2021-06-12 19:25:00,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 925.4ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 19:25:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-12 19:25:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2021-06-12 19:25:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8545 states have (on average 3.1049736688121707) internal successors, (26532), 8545 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2021-06-12 19:25:01,121 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2021-06-12 19:25:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:01,122 INFO L482 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2021-06-12 19:25:01,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2021-06-12 19:25:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:01,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:01,134 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:01,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-12 19:25:01,356 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash -128045869, now seen corresponding path program 342 times [2021-06-12 19:25:01,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:01,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514686299] [2021-06-12 19:25:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:01,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:01,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514686299] [2021-06-12 19:25:01,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514686299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:01,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522921744] [2021-06-12 19:25:01,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:01,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:25:01,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:01,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522921744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:01,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:01,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 19:25:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141270173] [2021-06-12 19:25:01,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:25:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:25:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:25:01,582 INFO L87 Difference]: Start difference. First operand 8546 states and 26532 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:02,567 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2021-06-12 19:25:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:25:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:02,579 INFO L225 Difference]: With dead ends: 9224 [2021-06-12 19:25:02,579 INFO L226 Difference]: Without dead ends: 9216 [2021-06-12 19:25:02,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 19:25:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-06-12 19:25:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2021-06-12 19:25:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8570 states, 8569 states have (on average 3.104212860310421) internal successors, (26600), 8569 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2021-06-12 19:25:02,695 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2021-06-12 19:25:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:02,695 INFO L482 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2021-06-12 19:25:02,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2021-06-12 19:25:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:02,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:02,704 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:02,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-12 19:25:02,904 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash 653566347, now seen corresponding path program 343 times [2021-06-12 19:25:02,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:02,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751052452] [2021-06-12 19:25:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:02,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:02,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751052452] [2021-06-12 19:25:02,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751052452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:02,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393417778] [2021-06-12 19:25:02,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:02,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:03,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393417778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:03,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:03,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:25:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800449607] [2021-06-12 19:25:03,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:03,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:03,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:03,149 INFO L87 Difference]: Start difference. First operand 8570 states and 26600 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:04,180 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2021-06-12 19:25:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 19:25:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:04,192 INFO L225 Difference]: With dead ends: 10464 [2021-06-12 19:25:04,192 INFO L226 Difference]: Without dead ends: 10443 [2021-06-12 19:25:04,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 19:25:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-06-12 19:25:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2021-06-12 19:25:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9099 states, 9098 states have (on average 3.1227742360958453) internal successors, (28411), 9098 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2021-06-12 19:25:04,334 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2021-06-12 19:25:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:04,334 INFO L482 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2021-06-12 19:25:04,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2021-06-12 19:25:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:04,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:04,346 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:04,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:04,547 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 188975243, now seen corresponding path program 344 times [2021-06-12 19:25:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:04,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314781927] [2021-06-12 19:25:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:04,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:04,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314781927] [2021-06-12 19:25:04,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314781927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:04,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947990482] [2021-06-12 19:25:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:04,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:04,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947990482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:04,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:04,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:25:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214060779] [2021-06-12 19:25:04,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:04,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:04,772 INFO L87 Difference]: Start difference. First operand 9099 states and 28411 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:05,864 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2021-06-12 19:25:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 19:25:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:05,875 INFO L225 Difference]: With dead ends: 9961 [2021-06-12 19:25:05,875 INFO L226 Difference]: Without dead ends: 9953 [2021-06-12 19:25:05,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 939.2ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:25:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-06-12 19:25:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2021-06-12 19:25:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8602 states have (on average 3.106370611485701) internal successors, (26721), 8602 states have internal predecessors, (26721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2021-06-12 19:25:06,012 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2021-06-12 19:25:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:06,012 INFO L482 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2021-06-12 19:25:06,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2021-06-12 19:25:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:06,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:06,022 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:06,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:06,223 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 155376015, now seen corresponding path program 345 times [2021-06-12 19:25:06,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:06,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518377251] [2021-06-12 19:25:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:06,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:06,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518377251] [2021-06-12 19:25:06,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518377251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:06,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547705460] [2021-06-12 19:25:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:06,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:25:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:06,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:06,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547705460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:06,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:06,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 19:25:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366037491] [2021-06-12 19:25:06,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:25:06,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:25:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:25:06,453 INFO L87 Difference]: Start difference. First operand 8603 states and 26721 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:07,548 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2021-06-12 19:25:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:25:07,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:07,561 INFO L225 Difference]: With dead ends: 9572 [2021-06-12 19:25:07,561 INFO L226 Difference]: Without dead ends: 9556 [2021-06-12 19:25:07,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:25:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-06-12 19:25:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2021-06-12 19:25:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 3.1066319895968793) internal successors, (26279), 8459 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2021-06-12 19:25:07,692 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2021-06-12 19:25:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:07,692 INFO L482 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2021-06-12 19:25:07,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2021-06-12 19:25:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:07,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:07,702 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:07,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:07,902 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash -886200053, now seen corresponding path program 346 times [2021-06-12 19:25:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:07,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606523457] [2021-06-12 19:25:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:07,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:07,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606523457] [2021-06-12 19:25:07,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606523457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:07,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226956521] [2021-06-12 19:25:07,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:08,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:08,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:08,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:08,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:08,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226956521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:08,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:08,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 19:25:08,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645250917] [2021-06-12 19:25:08,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:25:08,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:25:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:25:08,183 INFO L87 Difference]: Start difference. First operand 8460 states and 26279 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:09,100 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2021-06-12 19:25:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 19:25:09,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:09,111 INFO L225 Difference]: With dead ends: 9239 [2021-06-12 19:25:09,111 INFO L226 Difference]: Without dead ends: 9227 [2021-06-12 19:25:09,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:25:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-06-12 19:25:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2021-06-12 19:25:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8489 states have (on average 3.107197549770291) internal successors, (26377), 8489 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2021-06-12 19:25:09,235 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2021-06-12 19:25:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:09,235 INFO L482 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2021-06-12 19:25:09,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2021-06-12 19:25:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:09,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:09,245 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:09,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-06-12 19:25:09,446 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash 849710159, now seen corresponding path program 347 times [2021-06-12 19:25:09,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:09,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510269904] [2021-06-12 19:25:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:09,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:09,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510269904] [2021-06-12 19:25:09,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510269904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:09,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729897121] [2021-06-12 19:25:09,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:09,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:25:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:09,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729897121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:09,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:09,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-12 19:25:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614488160] [2021-06-12 19:25:09,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:09,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:09,652 INFO L87 Difference]: Start difference. First operand 8490 states and 26377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:10,531 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2021-06-12 19:25:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 19:25:10,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:10,580 INFO L225 Difference]: With dead ends: 10604 [2021-06-12 19:25:10,581 INFO L226 Difference]: Without dead ends: 10586 [2021-06-12 19:25:10,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:25:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-06-12 19:25:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2021-06-12 19:25:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 3.121513055121625) internal successors, (27975), 8962 states have internal predecessors, (27975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2021-06-12 19:25:10,711 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2021-06-12 19:25:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:10,711 INFO L482 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2021-06-12 19:25:10,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2021-06-12 19:25:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:10,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:10,723 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:10,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-12 19:25:10,923 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:10,923 INFO L82 PathProgramCache]: Analyzing trace with hash 385119055, now seen corresponding path program 348 times [2021-06-12 19:25:10,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:10,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425980593] [2021-06-12 19:25:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:10,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425980593] [2021-06-12 19:25:10,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425980593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249836491] [2021-06-12 19:25:10,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:11,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:25:11,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:11,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:11,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249836491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:11,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:11,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-12 19:25:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982682531] [2021-06-12 19:25:11,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:11,153 INFO L87 Difference]: Start difference. First operand 8963 states and 27975 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:12,284 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2021-06-12 19:25:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 19:25:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:12,296 INFO L225 Difference]: With dead ends: 9967 [2021-06-12 19:25:12,297 INFO L226 Difference]: Without dead ends: 9961 [2021-06-12 19:25:12,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 1003.8ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 19:25:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-12 19:25:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2021-06-12 19:25:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8723 states have (on average 3.112690588100424) internal successors, (27152), 8723 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2021-06-12 19:25:12,435 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2021-06-12 19:25:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:12,435 INFO L482 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2021-06-12 19:25:12,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2021-06-12 19:25:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:12,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:12,445 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:12,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:12,645 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 351519827, now seen corresponding path program 349 times [2021-06-12 19:25:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:12,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897208876] [2021-06-12 19:25:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:12,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897208876] [2021-06-12 19:25:12,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897208876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213048011] [2021-06-12 19:25:12,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:12,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:12,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:12,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213048011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:12,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:12,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-12 19:25:12,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41704079] [2021-06-12 19:25:12,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:25:12,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:12,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:25:12,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:25:12,918 INFO L87 Difference]: Start difference. First operand 8724 states and 27152 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:14,037 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2021-06-12 19:25:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 19:25:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:14,049 INFO L225 Difference]: With dead ends: 9884 [2021-06-12 19:25:14,049 INFO L226 Difference]: Without dead ends: 9874 [2021-06-12 19:25:14,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1023.1ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 19:25:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-06-12 19:25:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2021-06-12 19:25:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 3.1133333333333333) internal successors, (27086), 8700 states have internal predecessors, (27086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2021-06-12 19:25:14,188 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2021-06-12 19:25:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:14,188 INFO L482 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2021-06-12 19:25:14,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2021-06-12 19:25:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:14,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:14,199 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:14,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-12 19:25:14,401 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -690056241, now seen corresponding path program 350 times [2021-06-12 19:25:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:14,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120774284] [2021-06-12 19:25:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:14,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:14,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120774284] [2021-06-12 19:25:14,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120774284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:14,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822132783] [2021-06-12 19:25:14,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:14,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:14,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:14,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822132783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:14,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:14,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-12 19:25:14,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473933698] [2021-06-12 19:25:14,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:25:14,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:25:14,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:25:14,649 INFO L87 Difference]: Start difference. First operand 8701 states and 27086 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:15,706 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2021-06-12 19:25:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:25:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:15,719 INFO L225 Difference]: With dead ends: 9922 [2021-06-12 19:25:15,719 INFO L226 Difference]: Without dead ends: 9904 [2021-06-12 19:25:15,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 944.7ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:25:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2021-06-12 19:25:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2021-06-12 19:25:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 3.1182634730538923) internal successors, (27079), 8684 states have internal predecessors, (27079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2021-06-12 19:25:15,842 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2021-06-12 19:25:15,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:15,842 INFO L482 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2021-06-12 19:25:15,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2021-06-12 19:25:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:15,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:15,852 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:16,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:16,052 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1380824019, now seen corresponding path program 351 times [2021-06-12 19:25:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:16,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018972387] [2021-06-12 19:25:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:16,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:16,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018972387] [2021-06-12 19:25:16,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018972387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:16,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764909968] [2021-06-12 19:25:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:16,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:25:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:16,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764909968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:16,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:16,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-12 19:25:16,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778148871] [2021-06-12 19:25:16,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:25:16,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:16,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:25:16,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:25:16,295 INFO L87 Difference]: Start difference. First operand 8685 states and 27079 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:17,185 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2021-06-12 19:25:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 19:25:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:17,197 INFO L225 Difference]: With dead ends: 9621 [2021-06-12 19:25:17,197 INFO L226 Difference]: Without dead ends: 9605 [2021-06-12 19:25:17,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 821.8ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:25:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-12 19:25:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2021-06-12 19:25:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 3.119219736087206) internal successors, (27184), 8715 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2021-06-12 19:25:17,321 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2021-06-12 19:25:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:17,321 INFO L482 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2021-06-12 19:25:17,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2021-06-12 19:25:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:17,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:17,330 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:17,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-06-12 19:25:17,530 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1659766261, now seen corresponding path program 352 times [2021-06-12 19:25:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:17,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985047369] [2021-06-12 19:25:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:17,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:17,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985047369] [2021-06-12 19:25:17,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985047369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:17,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428441613] [2021-06-12 19:25:17,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:17,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:17,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428441613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:17,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:17,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-12 19:25:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564330641] [2021-06-12 19:25:17,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:17,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:17,785 INFO L87 Difference]: Start difference. First operand 8716 states and 27184 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:18,608 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2021-06-12 19:25:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 19:25:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:18,622 INFO L225 Difference]: With dead ends: 11348 [2021-06-12 19:25:18,622 INFO L226 Difference]: Without dead ends: 11333 [2021-06-12 19:25:18,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 699.6ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:25:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2021-06-12 19:25:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2021-06-12 19:25:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 3.1397547797173733) internal successors, (30217), 9624 states have internal predecessors, (30217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2021-06-12 19:25:18,765 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2021-06-12 19:25:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:18,765 INFO L482 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2021-06-12 19:25:18,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2021-06-12 19:25:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:18,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:18,776 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:18,976 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2124357365, now seen corresponding path program 353 times [2021-06-12 19:25:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307043513] [2021-06-12 19:25:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:19,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:19,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307043513] [2021-06-12 19:25:19,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307043513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:19,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082943291] [2021-06-12 19:25:19,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:19,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:25:19,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082943291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:19,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:19,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-12 19:25:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387083217] [2021-06-12 19:25:19,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:19,186 INFO L87 Difference]: Start difference. First operand 9625 states and 30217 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:20,505 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2021-06-12 19:25:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 19:25:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:20,519 INFO L225 Difference]: With dead ends: 10893 [2021-06-12 19:25:20,519 INFO L226 Difference]: Without dead ends: 10887 [2021-06-12 19:25:20,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 1154.4ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 19:25:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-06-12 19:25:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2021-06-12 19:25:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.133869942808727) internal successors, (29590), 9442 states have internal predecessors, (29590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2021-06-12 19:25:20,651 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2021-06-12 19:25:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:20,651 INFO L482 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2021-06-12 19:25:20,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2021-06-12 19:25:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:20,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:20,661 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:20,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-12 19:25:20,862 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2137010703, now seen corresponding path program 354 times [2021-06-12 19:25:20,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:20,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874280697] [2021-06-12 19:25:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:20,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874280697] [2021-06-12 19:25:20,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874280697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431129835] [2021-06-12 19:25:20,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:20,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:25:20,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431129835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:21,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:21,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-12 19:25:21,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132434993] [2021-06-12 19:25:21,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:25:21,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:21,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:25:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:25:21,081 INFO L87 Difference]: Start difference. First operand 9443 states and 29590 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:22,382 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2021-06-12 19:25:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 19:25:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:22,397 INFO L225 Difference]: With dead ends: 10963 [2021-06-12 19:25:22,397 INFO L226 Difference]: Without dead ends: 10955 [2021-06-12 19:25:22,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 19:25:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-06-12 19:25:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2021-06-12 19:25:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9488 states, 9487 states have (on average 3.1347106566880996) internal successors, (29739), 9487 states have internal predecessors, (29739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2021-06-12 19:25:22,576 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2021-06-12 19:25:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:22,576 INFO L482 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2021-06-12 19:25:22,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2021-06-12 19:25:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:22,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:22,587 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:22,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:22,788 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:22,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1095434635, now seen corresponding path program 355 times [2021-06-12 19:25:22,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:22,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970733924] [2021-06-12 19:25:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:22,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970733924] [2021-06-12 19:25:22,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970733924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309148347] [2021-06-12 19:25:22,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:22,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:23,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309148347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:23,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:23,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-12 19:25:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222514877] [2021-06-12 19:25:23,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:25:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:25:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:25:23,014 INFO L87 Difference]: Start difference. First operand 9488 states and 29739 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:24,097 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2021-06-12 19:25:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 19:25:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:24,110 INFO L225 Difference]: With dead ends: 11074 [2021-06-12 19:25:24,110 INFO L226 Difference]: Without dead ends: 11062 [2021-06-12 19:25:24,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 968.6ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 19:25:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-06-12 19:25:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2021-06-12 19:25:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9716 states, 9715 states have (on average 3.138548636129696) internal successors, (30491), 9715 states have internal predecessors, (30491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2021-06-12 19:25:24,256 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2021-06-12 19:25:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:24,256 INFO L482 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2021-06-12 19:25:24,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2021-06-12 19:25:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:24,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:24,266 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:24,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable648 [2021-06-12 19:25:24,467 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1128652401, now seen corresponding path program 356 times [2021-06-12 19:25:24,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:24,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389095874] [2021-06-12 19:25:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:24,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389095874] [2021-06-12 19:25:24,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389095874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343892507] [2021-06-12 19:25:24,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:24,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:24,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343892507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:24,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:24,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-12 19:25:24,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070580796] [2021-06-12 19:25:24,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:25:24,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:25:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:25:24,860 INFO L87 Difference]: Start difference. First operand 9716 states and 30491 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:25,876 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2021-06-12 19:25:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 19:25:25,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:25,889 INFO L225 Difference]: With dead ends: 11386 [2021-06-12 19:25:25,890 INFO L226 Difference]: Without dead ends: 11370 [2021-06-12 19:25:25,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:25:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2021-06-12 19:25:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2021-06-12 19:25:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 3.1449188214070958) internal successors, (31380), 9978 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2021-06-12 19:25:26,032 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2021-06-12 19:25:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:26,033 INFO L482 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2021-06-12 19:25:26,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2021-06-12 19:25:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:26,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:26,043 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:26,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:26,244 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:26,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873781, now seen corresponding path program 357 times [2021-06-12 19:25:26,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:26,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315575435] [2021-06-12 19:25:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:26,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:26,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315575435] [2021-06-12 19:25:26,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315575435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:26,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963919322] [2021-06-12 19:25:26,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:26,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:25:26,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:26,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963919322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:26,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:26,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-12 19:25:26,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073184957] [2021-06-12 19:25:26,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:25:26,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:25:26,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:25:26,508 INFO L87 Difference]: Start difference. First operand 9979 states and 31380 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:27,433 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2021-06-12 19:25:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 19:25:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:27,446 INFO L225 Difference]: With dead ends: 11190 [2021-06-12 19:25:27,446 INFO L226 Difference]: Without dead ends: 11170 [2021-06-12 19:25:27,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 19:25:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2021-06-12 19:25:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2021-06-12 19:25:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10023 states, 10022 states have (on average 3.1446817002594294) internal successors, (31516), 10022 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2021-06-12 19:25:27,586 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2021-06-12 19:25:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:27,586 INFO L482 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2021-06-12 19:25:27,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2021-06-12 19:25:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:27,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:27,598 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:27,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-12 19:25:27,798 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2144123953, now seen corresponding path program 358 times [2021-06-12 19:25:27,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:27,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868508824] [2021-06-12 19:25:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:27,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:27,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868508824] [2021-06-12 19:25:27,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868508824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:27,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954468559] [2021-06-12 19:25:27,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:27,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:27,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:28,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954468559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:28,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:28,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-12 19:25:28,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905822223] [2021-06-12 19:25:28,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:28,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:28,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:28,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:28,015 INFO L87 Difference]: Start difference. First operand 10023 states and 31516 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:28,881 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2021-06-12 19:25:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 19:25:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:28,899 INFO L225 Difference]: With dead ends: 14250 [2021-06-12 19:25:28,899 INFO L226 Difference]: Without dead ends: 14238 [2021-06-12 19:25:28,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:25:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2021-06-12 19:25:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2021-06-12 19:25:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 11905 states have (on average 3.1850482990340194) internal successors, (37918), 11905 states have internal predecessors, (37918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2021-06-12 19:25:29,124 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2021-06-12 19:25:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:29,124 INFO L482 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2021-06-12 19:25:29,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2021-06-12 19:25:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:29,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:29,137 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:29,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:29,338 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:29,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1686252239, now seen corresponding path program 359 times [2021-06-12 19:25:29,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:29,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009227816] [2021-06-12 19:25:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:29,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009227816] [2021-06-12 19:25:29,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009227816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146789755] [2021-06-12 19:25:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:29,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:25:29,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:29,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146789755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:29,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:29,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-12 19:25:29,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210513808] [2021-06-12 19:25:29,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:29,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:29,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:29,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:29,542 INFO L87 Difference]: Start difference. First operand 11906 states and 37918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:30,979 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2021-06-12 19:25:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 19:25:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:30,996 INFO L225 Difference]: With dead ends: 13468 [2021-06-12 19:25:30,996 INFO L226 Difference]: Without dead ends: 13464 [2021-06-12 19:25:30,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 1262.6ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 19:25:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2021-06-12 19:25:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2021-06-12 19:25:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11668 states, 11667 states have (on average 3.1784520442273076) internal successors, (37083), 11667 states have internal predecessors, (37083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2021-06-12 19:25:31,251 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2021-06-12 19:25:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:31,251 INFO L482 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2021-06-12 19:25:31,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2021-06-12 19:25:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:31,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:31,265 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:31,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 19:25:31,466 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1652653011, now seen corresponding path program 360 times [2021-06-12 19:25:31,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:31,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971907246] [2021-06-12 19:25:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:31,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971907246] [2021-06-12 19:25:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971907246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686219399] [2021-06-12 19:25:31,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:31,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:25:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:31,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686219399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:31,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:31,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-12 19:25:31,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222074412] [2021-06-12 19:25:31,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:25:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:25:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:25:31,717 INFO L87 Difference]: Start difference. First operand 11668 states and 37083 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:33,020 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2021-06-12 19:25:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 19:25:33,020 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:33,040 INFO L225 Difference]: With dead ends: 13667 [2021-06-12 19:25:33,040 INFO L226 Difference]: Without dead ends: 13659 [2021-06-12 19:25:33,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 1146.0ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 19:25:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2021-06-12 19:25:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2021-06-12 19:25:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11875 states, 11874 states have (on average 3.1847734546067037) internal successors, (37816), 11874 states have internal predecessors, (37816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2021-06-12 19:25:33,229 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2021-06-12 19:25:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:33,229 INFO L482 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2021-06-12 19:25:33,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2021-06-12 19:25:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:33,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:33,243 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:33,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-12 19:25:33,444 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 611076943, now seen corresponding path program 361 times [2021-06-12 19:25:33,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:33,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639273275] [2021-06-12 19:25:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:33,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:33,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639273275] [2021-06-12 19:25:33,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639273275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:33,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095055584] [2021-06-12 19:25:33,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095055584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:33,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-12 19:25:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654916785] [2021-06-12 19:25:33,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:25:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:25:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:25:33,739 INFO L87 Difference]: Start difference. First operand 11875 states and 37816 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:34,937 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2021-06-12 19:25:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 19:25:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:34,955 INFO L225 Difference]: With dead ends: 14012 [2021-06-12 19:25:34,955 INFO L226 Difference]: Without dead ends: 14000 [2021-06-12 19:25:34,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 19:25:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2021-06-12 19:25:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2021-06-12 19:25:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12229 states have (on average 3.1900400686891817) internal successors, (39011), 12229 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2021-06-12 19:25:35,143 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2021-06-12 19:25:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:35,143 INFO L482 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2021-06-12 19:25:35,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2021-06-12 19:25:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:35,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:35,157 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:35,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:35,357 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1613010093, now seen corresponding path program 362 times [2021-06-12 19:25:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:35,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778940392] [2021-06-12 19:25:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:35,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:35,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778940392] [2021-06-12 19:25:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778940392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:35,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564372162] [2021-06-12 19:25:35,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:35,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:35,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564372162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:35,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:35,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-12 19:25:35,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107263648] [2021-06-12 19:25:35,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:25:35,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:25:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:25:35,621 INFO L87 Difference]: Start difference. First operand 12230 states and 39011 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:36,779 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2021-06-12 19:25:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:25:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:36,798 INFO L225 Difference]: With dead ends: 14528 [2021-06-12 19:25:36,798 INFO L226 Difference]: Without dead ends: 14512 [2021-06-12 19:25:36,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 1060.2ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 19:25:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-12 19:25:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2021-06-12 19:25:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13019 states, 13018 states have (on average 3.197649408511292) internal successors, (41627), 13018 states have internal predecessors, (41627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2021-06-12 19:25:36,998 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2021-06-12 19:25:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:36,998 INFO L482 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2021-06-12 19:25:36,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2021-06-12 19:25:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:37,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:37,014 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:37,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-12 19:25:37,215 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1840231473, now seen corresponding path program 363 times [2021-06-12 19:25:37,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:37,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982686870] [2021-06-12 19:25:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:37,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:37,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982686870] [2021-06-12 19:25:37,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982686870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272366348] [2021-06-12 19:25:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:37,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:25:37,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:37,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272366348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:37,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:37,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-12 19:25:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890250453] [2021-06-12 19:25:37,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:25:37,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:37,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:25:37,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:25:37,506 INFO L87 Difference]: Start difference. First operand 13019 states and 41627 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:38,589 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2021-06-12 19:25:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 19:25:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:38,609 INFO L225 Difference]: With dead ends: 15354 [2021-06-12 19:25:38,609 INFO L226 Difference]: Without dead ends: 15334 [2021-06-12 19:25:38,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 1013.2ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:25:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2021-06-12 19:25:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2021-06-12 19:25:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13814 states, 13813 states have (on average 3.2055310215014843) internal successors, (44278), 13813 states have internal predecessors, (44278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2021-06-12 19:25:38,843 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2021-06-12 19:25:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:38,844 INFO L482 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2021-06-12 19:25:38,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2021-06-12 19:25:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:38,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:38,862 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:39,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:39,062 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:39,063 INFO L82 PathProgramCache]: Analyzing trace with hash -294159661, now seen corresponding path program 364 times [2021-06-12 19:25:39,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:39,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062618815] [2021-06-12 19:25:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:39,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062618815] [2021-06-12 19:25:39,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062618815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404252725] [2021-06-12 19:25:39,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:39,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:39,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:39,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:39,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:39,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404252725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:39,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:39,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 19:25:39,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358550630] [2021-06-12 19:25:39,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:25:39,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:25:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:25:39,418 INFO L87 Difference]: Start difference. First operand 13814 states and 44278 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:40,375 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2021-06-12 19:25:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 19:25:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:40,393 INFO L225 Difference]: With dead ends: 15273 [2021-06-12 19:25:40,393 INFO L226 Difference]: Without dead ends: 15249 [2021-06-12 19:25:40,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 19:25:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2021-06-12 19:25:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2021-06-12 19:25:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 3.205248359887535) internal successors, (44460), 13871 states have internal predecessors, (44460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2021-06-12 19:25:40,601 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2021-06-12 19:25:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:40,601 INFO L482 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2021-06-12 19:25:40,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2021-06-12 19:25:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:40,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:40,620 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:40,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-12 19:25:40,832 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1105251501, now seen corresponding path program 365 times [2021-06-12 19:25:40,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:40,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975645026] [2021-06-12 19:25:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:40,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:40,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975645026] [2021-06-12 19:25:40,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975645026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:40,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216683594] [2021-06-12 19:25:40,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:40,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:25:40,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:40,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:41,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216683594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:41,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:41,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 19:25:41,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714844171] [2021-06-12 19:25:41,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:25:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:25:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:25:41,027 INFO L87 Difference]: Start difference. First operand 13872 states and 44460 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:41,193 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2021-06-12 19:25:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:25:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:41,215 INFO L225 Difference]: With dead ends: 16092 [2021-06-12 19:25:41,215 INFO L226 Difference]: Without dead ends: 16092 [2021-06-12 19:25:41,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:25:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-06-12 19:25:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2021-06-12 19:25:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 3.2041108644274154) internal successors, (44739), 13963 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2021-06-12 19:25:41,440 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2021-06-12 19:25:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:41,441 INFO L482 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2021-06-12 19:25:41,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2021-06-12 19:25:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:41,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:41,458 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:41,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:41,659 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -299012217, now seen corresponding path program 366 times [2021-06-12 19:25:41,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:41,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947230688] [2021-06-12 19:25:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:41,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:41,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947230688] [2021-06-12 19:25:41,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947230688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:41,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467365780] [2021-06-12 19:25:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:41,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:25:41,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:41,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467365780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:41,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:41,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:41,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278304772] [2021-06-12 19:25:41,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:41,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:41,863 INFO L87 Difference]: Start difference. First operand 13964 states and 44739 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:42,180 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2021-06-12 19:25:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:25:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:42,204 INFO L225 Difference]: With dead ends: 14987 [2021-06-12 19:25:42,204 INFO L226 Difference]: Without dead ends: 14987 [2021-06-12 19:25:42,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:25:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2021-06-12 19:25:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2021-06-12 19:25:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14006 states have (on average 3.203484221048122) internal successors, (44868), 14006 states have internal predecessors, (44868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2021-06-12 19:25:42,449 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2021-06-12 19:25:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:42,449 INFO L482 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2021-06-12 19:25:42,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2021-06-12 19:25:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:42,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:42,469 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:42,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:42,669 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash 549610255, now seen corresponding path program 367 times [2021-06-12 19:25:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:42,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319071238] [2021-06-12 19:25:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:42,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319071238] [2021-06-12 19:25:42,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319071238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264226578] [2021-06-12 19:25:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:42,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264226578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:42,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:42,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:42,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733947975] [2021-06-12 19:25:42,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:42,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:42,875 INFO L87 Difference]: Start difference. First operand 14007 states and 44868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:43,359 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2021-06-12 19:25:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:25:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:43,380 INFO L225 Difference]: With dead ends: 15501 [2021-06-12 19:25:43,380 INFO L226 Difference]: Without dead ends: 15501 [2021-06-12 19:25:43,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 19:25:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2021-06-12 19:25:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2021-06-12 19:25:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 3.2027748132337246) internal successors, (45015), 14055 states have internal predecessors, (45015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2021-06-12 19:25:43,697 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2021-06-12 19:25:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:43,697 INFO L482 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2021-06-12 19:25:43,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2021-06-12 19:25:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:43,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:43,714 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:43,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-06-12 19:25:43,914 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2055414137, now seen corresponding path program 368 times [2021-06-12 19:25:43,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:43,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86930160] [2021-06-12 19:25:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:43,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86930160] [2021-06-12 19:25:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86930160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:43,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712339200] [2021-06-12 19:25:43,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:44,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:44,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:44,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712339200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:44,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:44,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:44,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050112045] [2021-06-12 19:25:44,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:44,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:44,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:44,132 INFO L87 Difference]: Start difference. First operand 14056 states and 45015 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:44,814 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2021-06-12 19:25:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:25:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:44,835 INFO L225 Difference]: With dead ends: 15602 [2021-06-12 19:25:44,835 INFO L226 Difference]: Without dead ends: 15602 [2021-06-12 19:25:44,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 19:25:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2021-06-12 19:25:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2021-06-12 19:25:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14171 states have (on average 3.2011149530731777) internal successors, (45363), 14171 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2021-06-12 19:25:45,049 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2021-06-12 19:25:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:45,049 INFO L482 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2021-06-12 19:25:45,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2021-06-12 19:25:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:45,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:45,066 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:45,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-12 19:25:45,269 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1169615857, now seen corresponding path program 369 times [2021-06-12 19:25:45,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:45,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021113817] [2021-06-12 19:25:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:45,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:45,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021113817] [2021-06-12 19:25:45,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021113817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:45,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079737175] [2021-06-12 19:25:45,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:45,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:25:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:45,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079737175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:45,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:45,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:45,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673044503] [2021-06-12 19:25:45,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:45,495 INFO L87 Difference]: Start difference. First operand 14172 states and 45363 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:46,606 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2021-06-12 19:25:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:25:46,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:46,632 INFO L225 Difference]: With dead ends: 15707 [2021-06-12 19:25:46,633 INFO L226 Difference]: Without dead ends: 15707 [2021-06-12 19:25:46,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 19:25:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2021-06-12 19:25:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2021-06-12 19:25:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14281 states, 14280 states have (on average 3.1997198879551823) internal successors, (45692), 14280 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2021-06-12 19:25:46,895 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2021-06-12 19:25:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:46,895 INFO L482 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2021-06-12 19:25:46,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2021-06-12 19:25:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:46,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:46,914 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:47,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-12 19:25:47,114 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:47,118 INFO L82 PathProgramCache]: Analyzing trace with hash 937168263, now seen corresponding path program 370 times [2021-06-12 19:25:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:47,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776663832] [2021-06-12 19:25:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:47,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:47,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776663832] [2021-06-12 19:25:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776663832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:47,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451283521] [2021-06-12 19:25:47,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:47,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:47,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:47,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451283521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:47,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:47,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:47,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165123860] [2021-06-12 19:25:47,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:47,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:47,396 INFO L87 Difference]: Start difference. First operand 14281 states and 45692 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:48,407 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2021-06-12 19:25:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 19:25:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:48,430 INFO L225 Difference]: With dead ends: 15913 [2021-06-12 19:25:48,430 INFO L226 Difference]: Without dead ends: 15913 [2021-06-12 19:25:48,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 792.2ms TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 19:25:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2021-06-12 19:25:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2021-06-12 19:25:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 3.1991396058839854) internal successors, (46106), 14412 states have internal predecessors, (46106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2021-06-12 19:25:48,710 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2021-06-12 19:25:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:48,710 INFO L482 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2021-06-12 19:25:48,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2021-06-12 19:25:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:48,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:48,728 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:48,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-12 19:25:48,929 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1211628273, now seen corresponding path program 371 times [2021-06-12 19:25:48,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:48,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612498665] [2021-06-12 19:25:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:49,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:49,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612498665] [2021-06-12 19:25:49,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612498665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070244186] [2021-06-12 19:25:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:49,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:25:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:49,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070244186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:49,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:49,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105787453] [2021-06-12 19:25:49,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:49,138 INFO L87 Difference]: Start difference. First operand 14413 states and 46106 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:50,163 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2021-06-12 19:25:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 19:25:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:50,185 INFO L225 Difference]: With dead ends: 16226 [2021-06-12 19:25:50,186 INFO L226 Difference]: Without dead ends: 16226 [2021-06-12 19:25:50,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 19:25:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2021-06-12 19:25:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2021-06-12 19:25:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14454 states have (on average 3.204649232046492) internal successors, (46320), 14454 states have internal predecessors, (46320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2021-06-12 19:25:50,418 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2021-06-12 19:25:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:50,418 INFO L482 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2021-06-12 19:25:50,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2021-06-12 19:25:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:50,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:50,436 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:50,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-12 19:25:50,637 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash -640173467, now seen corresponding path program 372 times [2021-06-12 19:25:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:50,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987586000] [2021-06-12 19:25:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:50,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987586000] [2021-06-12 19:25:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987586000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:50,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968183121] [2021-06-12 19:25:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:50,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:25:50,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968183121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:50,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:50,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:50,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671389806] [2021-06-12 19:25:50,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:50,895 INFO L87 Difference]: Start difference. First operand 14455 states and 46320 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:51,961 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2021-06-12 19:25:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:25:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:51,982 INFO L225 Difference]: With dead ends: 15474 [2021-06-12 19:25:51,982 INFO L226 Difference]: Without dead ends: 15468 [2021-06-12 19:25:51,982 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 19:25:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2021-06-12 19:25:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2021-06-12 19:25:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 3.198752357464094) internal successors, (44098), 13786 states have internal predecessors, (44098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2021-06-12 19:25:52,201 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2021-06-12 19:25:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:52,201 INFO L482 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2021-06-12 19:25:52,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2021-06-12 19:25:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:52,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:52,218 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:52,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-12 19:25:52,419 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1723222283, now seen corresponding path program 373 times [2021-06-12 19:25:52,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:52,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64098637] [2021-06-12 19:25:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:52,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:52,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64098637] [2021-06-12 19:25:52,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64098637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:52,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48238403] [2021-06-12 19:25:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:52,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:52,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48238403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:52,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:52,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:52,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322964695] [2021-06-12 19:25:52,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:52,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:52,635 INFO L87 Difference]: Start difference. First operand 13787 states and 44098 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:53,440 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2021-06-12 19:25:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 19:25:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:53,464 INFO L225 Difference]: With dead ends: 17863 [2021-06-12 19:25:53,464 INFO L226 Difference]: Without dead ends: 17848 [2021-06-12 19:25:53,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:25:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2021-06-12 19:25:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2021-06-12 19:25:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15968 states have (on average 3.2116107214428857) internal successors, (51283), 15968 states have internal predecessors, (51283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2021-06-12 19:25:53,754 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2021-06-12 19:25:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:53,754 INFO L482 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2021-06-12 19:25:53,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2021-06-12 19:25:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:53,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:53,773 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:53,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-12 19:25:53,974 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1258631179, now seen corresponding path program 374 times [2021-06-12 19:25:53,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:53,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150257160] [2021-06-12 19:25:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:54,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:54,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150257160] [2021-06-12 19:25:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150257160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:54,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839688062] [2021-06-12 19:25:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:54,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:54,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:54,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839688062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:54,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:54,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:54,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813475696] [2021-06-12 19:25:54,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:54,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:54,189 INFO L87 Difference]: Start difference. First operand 15969 states and 51283 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:55,031 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2021-06-12 19:25:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 19:25:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:55,055 INFO L225 Difference]: With dead ends: 17633 [2021-06-12 19:25:55,055 INFO L226 Difference]: Without dead ends: 17629 [2021-06-12 19:25:55,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 19:25:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2021-06-12 19:25:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2021-06-12 19:25:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 15242 states have (on average 3.1953811835717096) internal successors, (48704), 15242 states have internal predecessors, (48704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2021-06-12 19:25:55,299 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2021-06-12 19:25:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:55,299 INFO L482 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2021-06-12 19:25:55,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2021-06-12 19:25:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:55,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:55,317 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:55,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-12 19:25:55,518 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1225031951, now seen corresponding path program 375 times [2021-06-12 19:25:55,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:55,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194264951] [2021-06-12 19:25:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:55,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:55,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194264951] [2021-06-12 19:25:55,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194264951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:55,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298576293] [2021-06-12 19:25:55,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:55,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:25:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298576293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:55,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:55,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57208091] [2021-06-12 19:25:55,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:55,814 INFO L87 Difference]: Start difference. First operand 15243 states and 48704 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:56,586 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2021-06-12 19:25:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 19:25:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:56,610 INFO L225 Difference]: With dead ends: 17307 [2021-06-12 19:25:56,610 INFO L226 Difference]: Without dead ends: 17299 [2021-06-12 19:25:56,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 640.3ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:25:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2021-06-12 19:25:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2021-06-12 19:25:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 3.1944730739500127) internal successors, (49591), 15524 states have internal predecessors, (49591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2021-06-12 19:25:56,846 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2021-06-12 19:25:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:56,846 INFO L482 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2021-06-12 19:25:56,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2021-06-12 19:25:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:56,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:56,864 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:57,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:57,065 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 183455883, now seen corresponding path program 376 times [2021-06-12 19:25:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066586827] [2021-06-12 19:25:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:57,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:57,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066586827] [2021-06-12 19:25:57,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066586827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:57,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849543024] [2021-06-12 19:25:57,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:57,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:57,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:57,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849543024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:57,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:57,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094871035] [2021-06-12 19:25:57,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:57,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:57,276 INFO L87 Difference]: Start difference. First operand 15525 states and 49591 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:57,987 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2021-06-12 19:25:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:25:57,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:58,011 INFO L225 Difference]: With dead ends: 17843 [2021-06-12 19:25:58,012 INFO L226 Difference]: Without dead ends: 17831 [2021-06-12 19:25:58,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:25:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2021-06-12 19:25:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2021-06-12 19:25:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15785 states, 15784 states have (on average 3.192663456664977) internal successors, (50393), 15784 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2021-06-12 19:25:58,293 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2021-06-12 19:25:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:58,293 INFO L482 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2021-06-12 19:25:58,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2021-06-12 19:25:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:58,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:58,312 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:58,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:58,513 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2040631153, now seen corresponding path program 377 times [2021-06-12 19:25:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986456180] [2021-06-12 19:25:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:58,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:58,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986456180] [2021-06-12 19:25:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986456180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:58,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265291181] [2021-06-12 19:25:58,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:58,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:25:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:58,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265291181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:58,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:58,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:25:58,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930330995] [2021-06-12 19:25:58,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:58,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:58,727 INFO L87 Difference]: Start difference. First operand 15785 states and 50393 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:59,358 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2021-06-12 19:25:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:25:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:25:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:59,383 INFO L225 Difference]: With dead ends: 18546 [2021-06-12 19:25:59,383 INFO L226 Difference]: Without dead ends: 18530 [2021-06-12 19:25:59,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 546.1ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 19:25:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-12 19:25:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2021-06-12 19:25:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15941 states, 15940 states have (on average 3.1888331242158094) internal successors, (50830), 15940 states have internal predecessors, (50830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2021-06-12 19:25:59,638 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2021-06-12 19:25:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:59,638 INFO L482 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2021-06-12 19:25:59,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:25:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2021-06-12 19:25:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:25:59,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:59,657 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:59,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:59,857 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2027114763, now seen corresponding path program 378 times [2021-06-12 19:25:59,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:59,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906533569] [2021-06-12 19:25:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:59,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906533569] [2021-06-12 19:25:59,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906533569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744287318] [2021-06-12 19:25:59,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:59,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:25:59,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:25:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:00,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744287318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:00,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:00,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:26:00,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70834280] [2021-06-12 19:26:00,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:00,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:00,073 INFO L87 Difference]: Start difference. First operand 15941 states and 50830 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:00,674 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2021-06-12 19:26:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:26:00,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:00,700 INFO L225 Difference]: With dead ends: 18841 [2021-06-12 19:26:00,700 INFO L226 Difference]: Without dead ends: 18821 [2021-06-12 19:26:00,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 19:26:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2021-06-12 19:26:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2021-06-12 19:26:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1873003945143714) internal successors, (50898), 15969 states have internal predecessors, (50898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2021-06-12 19:26:00,957 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2021-06-12 19:26:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:00,957 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2021-06-12 19:26:00,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2021-06-12 19:26:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:00,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:00,977 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:01,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:01,177 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -721780721, now seen corresponding path program 379 times [2021-06-12 19:26:01,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:01,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199863436] [2021-06-12 19:26:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:01,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:01,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199863436] [2021-06-12 19:26:01,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199863436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:01,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268167288] [2021-06-12 19:26:01,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:01,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268167288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:01,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:01,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:26:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554343586] [2021-06-12 19:26:01,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:01,402 INFO L87 Difference]: Start difference. First operand 15970 states and 50898 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:01,825 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2021-06-12 19:26:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:26:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:01,849 INFO L225 Difference]: With dead ends: 17288 [2021-06-12 19:26:01,849 INFO L226 Difference]: Without dead ends: 17276 [2021-06-12 19:26:01,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:26:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2021-06-12 19:26:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2021-06-12 19:26:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.186924666541424) internal successors, (50892), 15969 states have internal predecessors, (50892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2021-06-12 19:26:02,187 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2021-06-12 19:26:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:02,187 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2021-06-12 19:26:02,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2021-06-12 19:26:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:02,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:02,206 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:02,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-12 19:26:02,406 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:02,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:02,406 INFO L82 PathProgramCache]: Analyzing trace with hash -731252469, now seen corresponding path program 380 times [2021-06-12 19:26:02,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:02,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367010703] [2021-06-12 19:26:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:02,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:02,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367010703] [2021-06-12 19:26:02,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367010703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:02,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705542174] [2021-06-12 19:26:02,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:02,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:02,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:02,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705542174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:02,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:02,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 19:26:02,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895612985] [2021-06-12 19:26:02,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:26:02,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:26:02,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:26:02,619 INFO L87 Difference]: Start difference. First operand 15970 states and 50892 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:02,800 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2021-06-12 19:26:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:26:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:02,824 INFO L225 Difference]: With dead ends: 17070 [2021-06-12 19:26:02,824 INFO L226 Difference]: Without dead ends: 17056 [2021-06-12 19:26:02,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:26:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2021-06-12 19:26:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2021-06-12 19:26:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1868620452125995) internal successors, (50891), 15969 states have internal predecessors, (50891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2021-06-12 19:26:03,066 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2021-06-12 19:26:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:03,066 INFO L482 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2021-06-12 19:26:03,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2021-06-12 19:26:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:03,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:03,086 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:03,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-12 19:26:03,286 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1075398189, now seen corresponding path program 381 times [2021-06-12 19:26:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972072024] [2021-06-12 19:26:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:03,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:03,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972072024] [2021-06-12 19:26:03,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972072024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:03,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725467868] [2021-06-12 19:26:03,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:03,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:26:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:03,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725467868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:03,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:03,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 19:26:03,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327767368] [2021-06-12 19:26:03,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:03,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:03,505 INFO L87 Difference]: Start difference. First operand 15970 states and 50891 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:04,164 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2021-06-12 19:26:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 19:26:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:04,188 INFO L225 Difference]: With dead ends: 17305 [2021-06-12 19:26:04,188 INFO L226 Difference]: Without dead ends: 17305 [2021-06-12 19:26:04,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 19:26:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2021-06-12 19:26:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2021-06-12 19:26:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16020 states, 16019 states have (on average 3.1862787939322055) internal successors, (51041), 16019 states have internal predecessors, (51041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2021-06-12 19:26:04,524 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2021-06-12 19:26:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:04,524 INFO L482 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2021-06-12 19:26:04,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2021-06-12 19:26:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:04,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:04,546 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:04,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:04,746 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 310717139, now seen corresponding path program 382 times [2021-06-12 19:26:04,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:04,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619368368] [2021-06-12 19:26:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:04,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:04,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619368368] [2021-06-12 19:26:04,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619368368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:04,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842061778] [2021-06-12 19:26:04,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:04,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:04,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842061778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:04,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:04,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:26:04,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64997897] [2021-06-12 19:26:04,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:04,967 INFO L87 Difference]: Start difference. First operand 16020 states and 51041 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:05,567 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2021-06-12 19:26:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:26:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:05,591 INFO L225 Difference]: With dead ends: 17722 [2021-06-12 19:26:05,591 INFO L226 Difference]: Without dead ends: 17708 [2021-06-12 19:26:05,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 19:26:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2021-06-12 19:26:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2021-06-12 19:26:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16053 states, 16052 states have (on average 3.185771243458759) internal successors, (51138), 16052 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2021-06-12 19:26:05,849 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2021-06-12 19:26:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:05,849 INFO L482 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2021-06-12 19:26:05,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2021-06-12 19:26:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:05,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:05,868 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:06,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-12 19:26:06,068 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1445684781, now seen corresponding path program 383 times [2021-06-12 19:26:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:06,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246201516] [2021-06-12 19:26:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:06,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:06,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246201516] [2021-06-12 19:26:06,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246201516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:06,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509153238] [2021-06-12 19:26:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:06,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:26:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:06,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509153238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:06,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:06,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:26:06,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291729116] [2021-06-12 19:26:06,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:06,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:06,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:06,283 INFO L87 Difference]: Start difference. First operand 16053 states and 51138 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:06,856 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2021-06-12 19:26:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:26:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:06,880 INFO L225 Difference]: With dead ends: 17524 [2021-06-12 19:26:06,880 INFO L226 Difference]: Without dead ends: 17506 [2021-06-12 19:26:06,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:26:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2021-06-12 19:26:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2021-06-12 19:26:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 3.1848008450879264) internal successors, (51253), 16093 states have internal predecessors, (51253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2021-06-12 19:26:07,179 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2021-06-12 19:26:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:07,179 INFO L482 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2021-06-12 19:26:07,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2021-06-12 19:26:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:07,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:07,198 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:07,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:07,398 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1130056403, now seen corresponding path program 384 times [2021-06-12 19:26:07,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:07,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890340842] [2021-06-12 19:26:07,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:07,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890340842] [2021-06-12 19:26:07,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890340842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557371410] [2021-06-12 19:26:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:07,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:26:07,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:07,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:07,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557371410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:07,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:07,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:26:07,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40729245] [2021-06-12 19:26:07,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:07,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:07,606 INFO L87 Difference]: Start difference. First operand 16094 states and 51253 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:08,421 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2021-06-12 19:26:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:26:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:08,445 INFO L225 Difference]: With dead ends: 17741 [2021-06-12 19:26:08,446 INFO L226 Difference]: Without dead ends: 17731 [2021-06-12 19:26:08,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 19:26:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2021-06-12 19:26:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2021-06-12 19:26:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.1827552154055057) internal successors, (51567), 16202 states have internal predecessors, (51567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2021-06-12 19:26:08,700 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2021-06-12 19:26:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:08,701 INFO L482 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2021-06-12 19:26:08,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2021-06-12 19:26:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:08,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:08,721 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:08,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-12 19:26:08,921 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -172328493, now seen corresponding path program 385 times [2021-06-12 19:26:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:08,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873705614] [2021-06-12 19:26:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:08,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873705614] [2021-06-12 19:26:08,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873705614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226168089] [2021-06-12 19:26:08,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:09,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226168089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:09,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:09,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:26:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571499483] [2021-06-12 19:26:09,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:09,123 INFO L87 Difference]: Start difference. First operand 16203 states and 51567 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:10,152 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2021-06-12 19:26:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 19:26:10,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:10,176 INFO L225 Difference]: With dead ends: 18351 [2021-06-12 19:26:10,176 INFO L226 Difference]: Without dead ends: 18347 [2021-06-12 19:26:10,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 19:26:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2021-06-12 19:26:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2021-06-12 19:26:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16270 states, 16269 states have (on average 3.1803429835884196) internal successors, (51741), 16269 states have internal predecessors, (51741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2021-06-12 19:26:10,436 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2021-06-12 19:26:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:10,436 INFO L482 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2021-06-12 19:26:10,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2021-06-12 19:26:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:10,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:10,455 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:10,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:10,656 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash -214340909, now seen corresponding path program 386 times [2021-06-12 19:26:10,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:10,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931050159] [2021-06-12 19:26:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:10,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931050159] [2021-06-12 19:26:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931050159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960481555] [2021-06-12 19:26:10,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:10,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960481555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:10,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:10,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:26:10,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993660238] [2021-06-12 19:26:10,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:10,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:10,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:10,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:10,860 INFO L87 Difference]: Start difference. First operand 16270 states and 51741 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:11,799 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2021-06-12 19:26:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 19:26:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:11,824 INFO L225 Difference]: With dead ends: 18812 [2021-06-12 19:26:11,824 INFO L226 Difference]: Without dead ends: 18812 [2021-06-12 19:26:11,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 768.0ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 19:26:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2021-06-12 19:26:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2021-06-12 19:26:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16419 states, 16418 states have (on average 3.188451699354367) internal successors, (52348), 16418 states have internal predecessors, (52348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2021-06-12 19:26:12,086 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2021-06-12 19:26:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:12,086 INFO L482 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2021-06-12 19:26:12,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2021-06-12 19:26:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:12,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:12,105 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:12,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-12 19:26:12,306 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 357113897, now seen corresponding path program 387 times [2021-06-12 19:26:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390701640] [2021-06-12 19:26:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:12,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390701640] [2021-06-12 19:26:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390701640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671176474] [2021-06-12 19:26:12,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:12,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:26:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:12,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671176474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:12,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:12,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 19:26:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344618964] [2021-06-12 19:26:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:12,514 INFO L87 Difference]: Start difference. First operand 16419 states and 52348 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:13,609 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2021-06-12 19:26:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:26:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:13,633 INFO L225 Difference]: With dead ends: 17894 [2021-06-12 19:26:13,633 INFO L226 Difference]: Without dead ends: 17879 [2021-06-12 19:26:13,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 934.1ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 19:26:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2021-06-12 19:26:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2021-06-12 19:26:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15867 states have (on average 3.1803743618831537) internal successors, (50463), 15867 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2021-06-12 19:26:13,873 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2021-06-12 19:26:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:13,873 INFO L482 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2021-06-12 19:26:13,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2021-06-12 19:26:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:13,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:13,892 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:14,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:14,092 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:14,092 INFO L82 PathProgramCache]: Analyzing trace with hash 892343699, now seen corresponding path program 388 times [2021-06-12 19:26:14,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:14,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287366573] [2021-06-12 19:26:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:14,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287366573] [2021-06-12 19:26:14,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287366573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439749031] [2021-06-12 19:26:14,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:14,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:14,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:14,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439749031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:14,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:14,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 19:26:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948605361] [2021-06-12 19:26:14,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:14,320 INFO L87 Difference]: Start difference. First operand 15868 states and 50463 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:15,283 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2021-06-12 19:26:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:26:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:15,306 INFO L225 Difference]: With dead ends: 17262 [2021-06-12 19:26:15,306 INFO L226 Difference]: Without dead ends: 17250 [2021-06-12 19:26:15,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 19:26:15,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-12 19:26:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2021-06-12 19:26:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.1800087901048535) internal successors, (50648), 15927 states have internal predecessors, (50648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2021-06-12 19:26:15,595 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2021-06-12 19:26:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:15,595 INFO L482 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2021-06-12 19:26:15,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2021-06-12 19:26:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:15,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:15,613 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:15,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:15,814 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash 626440455, now seen corresponding path program 389 times [2021-06-12 19:26:15,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:15,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487824528] [2021-06-12 19:26:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:15,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:15,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487824528] [2021-06-12 19:26:15,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487824528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:15,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961313909] [2021-06-12 19:26:15,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:15,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:26:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:16,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961313909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:16,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:16,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 19:26:16,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66969685] [2021-06-12 19:26:16,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:26:16,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:26:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:16,054 INFO L87 Difference]: Start difference. First operand 15928 states and 50648 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:16,811 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2021-06-12 19:26:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:26:16,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:16,835 INFO L225 Difference]: With dead ends: 17178 [2021-06-12 19:26:16,836 INFO L226 Difference]: Without dead ends: 17178 [2021-06-12 19:26:16,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:26:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2021-06-12 19:26:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2021-06-12 19:26:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 15886 states have (on average 3.1804733727810652) internal successors, (50525), 15886 states have internal predecessors, (50525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2021-06-12 19:26:17,070 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2021-06-12 19:26:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:17,071 INFO L482 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2021-06-12 19:26:17,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2021-06-12 19:26:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:17,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:17,090 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:17,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:17,290 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1494965135, now seen corresponding path program 390 times [2021-06-12 19:26:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:17,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117256711] [2021-06-12 19:26:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:17,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:17,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117256711] [2021-06-12 19:26:17,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117256711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:17,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461890771] [2021-06-12 19:26:17,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:17,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:26:17,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:17,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:17,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:17,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461890771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:17,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:17,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 19:26:17,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417967980] [2021-06-12 19:26:17,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:17,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:17,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:17,504 INFO L87 Difference]: Start difference. First operand 15887 states and 50525 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:18,191 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2021-06-12 19:26:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 19:26:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:18,215 INFO L225 Difference]: With dead ends: 17298 [2021-06-12 19:26:18,215 INFO L226 Difference]: Without dead ends: 17284 [2021-06-12 19:26:18,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 553.7ms TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 19:26:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2021-06-12 19:26:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2021-06-12 19:26:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 3.180147290237301) internal successors, (50523), 15887 states have internal predecessors, (50523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2021-06-12 19:26:18,526 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2021-06-12 19:26:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:18,526 INFO L482 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2021-06-12 19:26:18,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2021-06-12 19:26:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:18,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:18,547 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:18,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-12 19:26:18,747 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 276056071, now seen corresponding path program 391 times [2021-06-12 19:26:18,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:18,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342253810] [2021-06-12 19:26:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:18,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:18,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342253810] [2021-06-12 19:26:18,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342253810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:18,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979651194] [2021-06-12 19:26:18,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979651194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:18,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:18,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:26:18,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938885220] [2021-06-12 19:26:18,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:18,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:18,954 INFO L87 Difference]: Start difference. First operand 15888 states and 50523 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:19,645 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2021-06-12 19:26:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:26:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:19,668 INFO L225 Difference]: With dead ends: 17783 [2021-06-12 19:26:19,669 INFO L226 Difference]: Without dead ends: 17773 [2021-06-12 19:26:19,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 19:26:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2021-06-12 19:26:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2021-06-12 19:26:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 3.1781652293463316) internal successors, (50857), 16002 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2021-06-12 19:26:19,911 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2021-06-12 19:26:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:19,911 INFO L482 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2021-06-12 19:26:19,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2021-06-12 19:26:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:19,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:19,930 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:20,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:20,131 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -594547569, now seen corresponding path program 392 times [2021-06-12 19:26:20,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:20,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779851981] [2021-06-12 19:26:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:20,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779851981] [2021-06-12 19:26:20,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779851981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373150223] [2021-06-12 19:26:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:20,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:20,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:20,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:20,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373150223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:20,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:20,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:26:20,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957372356] [2021-06-12 19:26:20,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:20,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:20,335 INFO L87 Difference]: Start difference. First operand 16003 states and 50857 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:21,150 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2021-06-12 19:26:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 19:26:21,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:21,172 INFO L225 Difference]: With dead ends: 17914 [2021-06-12 19:26:21,173 INFO L226 Difference]: Without dead ends: 17904 [2021-06-12 19:26:21,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 19:26:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2021-06-12 19:26:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2021-06-12 19:26:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16144 states, 16143 states have (on average 3.1767329492659355) internal successors, (51282), 16143 states have internal predecessors, (51282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2021-06-12 19:26:21,404 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2021-06-12 19:26:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:21,404 INFO L482 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2021-06-12 19:26:21,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2021-06-12 19:26:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:21,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:21,423 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:21,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-12 19:26:21,624 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash -206989561, now seen corresponding path program 393 times [2021-06-12 19:26:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:21,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044510794] [2021-06-12 19:26:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:21,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:21,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044510794] [2021-06-12 19:26:21,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044510794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:21,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320585629] [2021-06-12 19:26:21,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:21,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:26:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:21,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320585629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:21,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:21,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:26:21,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900545167] [2021-06-12 19:26:21,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:21,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:21,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:21,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:21,831 INFO L87 Difference]: Start difference. First operand 16144 states and 51282 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:22,902 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2021-06-12 19:26:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:26:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:22,927 INFO L225 Difference]: With dead ends: 18800 [2021-06-12 19:26:22,927 INFO L226 Difference]: Without dead ends: 18796 [2021-06-12 19:26:22,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:26:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2021-06-12 19:26:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2021-06-12 19:26:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 3.176448942042318) internal successors, (51792), 16305 states have internal predecessors, (51792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2021-06-12 19:26:23,170 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2021-06-12 19:26:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:23,170 INFO L482 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2021-06-12 19:26:23,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2021-06-12 19:26:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:23,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:23,189 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:23,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-12 19:26:23,389 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash 636796303, now seen corresponding path program 394 times [2021-06-12 19:26:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944478267] [2021-06-12 19:26:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944478267] [2021-06-12 19:26:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944478267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477155062] [2021-06-12 19:26:23,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:23,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:23,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477155062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:23,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:23,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:26:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59593400] [2021-06-12 19:26:23,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:23,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:23,603 INFO L87 Difference]: Start difference. First operand 16306 states and 51792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:24,544 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2021-06-12 19:26:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 19:26:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:24,570 INFO L225 Difference]: With dead ends: 19224 [2021-06-12 19:26:24,570 INFO L226 Difference]: Without dead ends: 19224 [2021-06-12 19:26:24,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 757.1ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 19:26:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2021-06-12 19:26:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2021-06-12 19:26:24,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16395 states, 16394 states have (on average 3.1835427595461754) internal successors, (52191), 16394 states have internal predecessors, (52191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2021-06-12 19:26:24,826 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2021-06-12 19:26:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:24,826 INFO L482 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2021-06-12 19:26:24,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2021-06-12 19:26:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:24,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:24,845 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:25,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:25,046 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1208251109, now seen corresponding path program 395 times [2021-06-12 19:26:25,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:25,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608251475] [2021-06-12 19:26:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:25,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:25,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608251475] [2021-06-12 19:26:25,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608251475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:25,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180493297] [2021-06-12 19:26:25,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:25,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:26:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:25,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:25,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180493297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:25,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:25,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 19:26:25,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024452867] [2021-06-12 19:26:25,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:25,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:25,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:25,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:25,250 INFO L87 Difference]: Start difference. First operand 16395 states and 52191 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:26,329 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2021-06-12 19:26:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 19:26:26,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:26,355 INFO L225 Difference]: With dead ends: 18347 [2021-06-12 19:26:26,355 INFO L226 Difference]: Without dead ends: 18335 [2021-06-12 19:26:26,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 915.0ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:26:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2021-06-12 19:26:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2021-06-12 19:26:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.1781852082038533) internal successors, (51137), 16090 states have internal predecessors, (51137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2021-06-12 19:26:26,666 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2021-06-12 19:26:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:26,666 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2021-06-12 19:26:26,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2021-06-12 19:26:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:26,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:26,684 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-12 19:26:26,889 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1743480911, now seen corresponding path program 396 times [2021-06-12 19:26:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:26,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113538583] [2021-06-12 19:26:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:26,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:26,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113538583] [2021-06-12 19:26:26,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113538583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:26,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711282893] [2021-06-12 19:26:26,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:26,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:26:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:27,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711282893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:27,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:27,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 19:26:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323369586] [2021-06-12 19:26:27,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:27,102 INFO L87 Difference]: Start difference. First operand 16091 states and 51137 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:28,155 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2021-06-12 19:26:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:26:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:28,179 INFO L225 Difference]: With dead ends: 18125 [2021-06-12 19:26:28,179 INFO L226 Difference]: Without dead ends: 18101 [2021-06-12 19:26:28,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 901.5ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:26:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-06-12 19:26:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2021-06-12 19:26:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15883 states have (on average 3.1798148964301456) internal successors, (50505), 15883 states have internal predecessors, (50505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2021-06-12 19:26:28,421 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2021-06-12 19:26:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:28,422 INFO L482 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2021-06-12 19:26:28,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2021-06-12 19:26:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:28,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:28,441 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:28,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-12 19:26:28,641 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1155735589, now seen corresponding path program 397 times [2021-06-12 19:26:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:28,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798764172] [2021-06-12 19:26:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:28,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:28,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798764172] [2021-06-12 19:26:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798764172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:28,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734997706] [2021-06-12 19:26:28,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:28,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:28,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734997706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:28,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:28,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 19:26:28,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225170012] [2021-06-12 19:26:28,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:26:28,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:26:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:28,871 INFO L87 Difference]: Start difference. First operand 15884 states and 50505 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:29,845 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2021-06-12 19:26:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 19:26:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:29,868 INFO L225 Difference]: With dead ends: 17742 [2021-06-12 19:26:29,869 INFO L226 Difference]: Without dead ends: 17724 [2021-06-12 19:26:29,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:26:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-12 19:26:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2021-06-12 19:26:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.180322722421046) internal successors, (50653), 15927 states have internal predecessors, (50653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2021-06-12 19:26:30,107 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2021-06-12 19:26:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:30,107 INFO L482 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2021-06-12 19:26:30,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2021-06-12 19:26:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:30,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:30,127 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:30,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:30,327 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1843830867, now seen corresponding path program 398 times [2021-06-12 19:26:30,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:30,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348760785] [2021-06-12 19:26:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:30,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348760785] [2021-06-12 19:26:30,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348760785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371340191] [2021-06-12 19:26:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:30,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:30,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:30,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:30,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371340191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:30,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:30,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-12 19:26:30,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488873514] [2021-06-12 19:26:30,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:26:30,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:26:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:26:30,565 INFO L87 Difference]: Start difference. First operand 15928 states and 50653 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:31,439 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2021-06-12 19:26:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 19:26:31,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:31,462 INFO L225 Difference]: With dead ends: 16795 [2021-06-12 19:26:31,463 INFO L226 Difference]: Without dead ends: 16795 [2021-06-12 19:26:31,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 19:26:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-12 19:26:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2021-06-12 19:26:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15853 states, 15852 states have (on average 3.181049709815796) internal successors, (50426), 15852 states have internal predecessors, (50426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2021-06-12 19:26:31,692 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2021-06-12 19:26:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:31,692 INFO L482 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2021-06-12 19:26:31,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2021-06-12 19:26:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:31,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:31,710 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:31,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:31,911 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash -448052653, now seen corresponding path program 399 times [2021-06-12 19:26:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:31,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584231725] [2021-06-12 19:26:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:31,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:31,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584231725] [2021-06-12 19:26:31,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584231725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997857991] [2021-06-12 19:26:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:32,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:26:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:32,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997857991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:32,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:32,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-12 19:26:32,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899608866] [2021-06-12 19:26:32,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:26:32,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:26:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:32,142 INFO L87 Difference]: Start difference. First operand 15853 states and 50426 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:32,961 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2021-06-12 19:26:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:26:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:32,983 INFO L225 Difference]: With dead ends: 16783 [2021-06-12 19:26:32,983 INFO L226 Difference]: Without dead ends: 16769 [2021-06-12 19:26:32,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 19:26:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2021-06-12 19:26:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2021-06-12 19:26:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15761 states, 15760 states have (on average 3.1805837563451775) internal successors, (50126), 15760 states have internal predecessors, (50126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2021-06-12 19:26:33,219 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2021-06-12 19:26:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:33,219 INFO L482 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2021-06-12 19:26:33,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2021-06-12 19:26:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:33,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:33,237 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:33,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:33,438 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2110414931, now seen corresponding path program 400 times [2021-06-12 19:26:33,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:33,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064652107] [2021-06-12 19:26:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:33,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064652107] [2021-06-12 19:26:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064652107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:33,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997173924] [2021-06-12 19:26:33,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:33,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:33,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997173924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:33,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:33,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-12 19:26:33,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564318958] [2021-06-12 19:26:33,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:33,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:33,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:33,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:33,668 INFO L87 Difference]: Start difference. First operand 15761 states and 50126 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:34,469 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2021-06-12 19:26:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:26:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:34,494 INFO L225 Difference]: With dead ends: 17488 [2021-06-12 19:26:34,494 INFO L226 Difference]: Without dead ends: 17478 [2021-06-12 19:26:34,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 19:26:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-06-12 19:26:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2021-06-12 19:26:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15724 states, 15723 states have (on average 3.179800292565032) internal successors, (49996), 15723 states have internal predecessors, (49996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2021-06-12 19:26:34,744 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2021-06-12 19:26:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:34,744 INFO L482 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2021-06-12 19:26:34,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2021-06-12 19:26:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:34,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:34,763 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:34,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:34,963 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1777304147, now seen corresponding path program 401 times [2021-06-12 19:26:34,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:34,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463151449] [2021-06-12 19:26:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:35,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463151449] [2021-06-12 19:26:35,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463151449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063240458] [2021-06-12 19:26:35,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:35,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:26:35,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:35,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:35,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063240458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:35,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:35,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-12 19:26:35,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342632562] [2021-06-12 19:26:35,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:35,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:35,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:35,253 INFO L87 Difference]: Start difference. First operand 15724 states and 49996 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:36,054 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2021-06-12 19:26:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 19:26:36,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:36,080 INFO L225 Difference]: With dead ends: 19027 [2021-06-12 19:26:36,080 INFO L226 Difference]: Without dead ends: 19021 [2021-06-12 19:26:36,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 623.3ms TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 19:26:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-12 19:26:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2021-06-12 19:26:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.178584706902962) internal successors, (51296), 16138 states have internal predecessors, (51296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2021-06-12 19:26:36,328 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2021-06-12 19:26:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:36,328 INFO L482 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2021-06-12 19:26:36,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2021-06-12 19:26:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:36,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:36,347 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:36,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-12 19:26:36,547 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1281482669, now seen corresponding path program 402 times [2021-06-12 19:26:36,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:36,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116597882] [2021-06-12 19:26:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:36,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:36,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116597882] [2021-06-12 19:26:36,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116597882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:36,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535683581] [2021-06-12 19:26:36,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:36,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:26:36,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:36,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535683581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:36,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:36,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-12 19:26:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110682680] [2021-06-12 19:26:36,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:36,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:36,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:36,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:36,749 INFO L87 Difference]: Start difference. First operand 16139 states and 51296 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:37,591 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2021-06-12 19:26:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:26:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:37,617 INFO L225 Difference]: With dead ends: 18678 [2021-06-12 19:26:37,617 INFO L226 Difference]: Without dead ends: 18674 [2021-06-12 19:26:37,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:26:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2021-06-12 19:26:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2021-06-12 19:26:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16227 states, 16226 states have (on average 3.1787255022802907) internal successors, (51578), 16226 states have internal predecessors, (51578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2021-06-12 19:26:37,933 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2021-06-12 19:26:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:37,933 INFO L482 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2021-06-12 19:26:37,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2021-06-12 19:26:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:37,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:37,954 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:38,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-12 19:26:38,154 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1252246099, now seen corresponding path program 403 times [2021-06-12 19:26:38,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:38,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230229991] [2021-06-12 19:26:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:38,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230229991] [2021-06-12 19:26:38,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230229991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514732102] [2021-06-12 19:26:38,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:38,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514732102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:38,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:38,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-12 19:26:38,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260794898] [2021-06-12 19:26:38,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:38,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:38,364 INFO L87 Difference]: Start difference. First operand 16227 states and 51578 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:39,223 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2021-06-12 19:26:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 19:26:39,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:39,250 INFO L225 Difference]: With dead ends: 19416 [2021-06-12 19:26:39,250 INFO L226 Difference]: Without dead ends: 19416 [2021-06-12 19:26:39,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:26:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2021-06-12 19:26:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2021-06-12 19:26:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 16137 states have (on average 3.1851645287228108) internal successors, (51399), 16137 states have internal predecessors, (51399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2021-06-12 19:26:39,500 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2021-06-12 19:26:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:39,500 INFO L482 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2021-06-12 19:26:39,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2021-06-12 19:26:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:39,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:39,519 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:39,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-12 19:26:39,720 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1823700905, now seen corresponding path program 404 times [2021-06-12 19:26:39,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:39,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531083985] [2021-06-12 19:26:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:39,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:39,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531083985] [2021-06-12 19:26:39,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531083985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:39,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462806651] [2021-06-12 19:26:39,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:39,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:39,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:39,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:39,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462806651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:39,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:39,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-06-12 19:26:39,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478427706] [2021-06-12 19:26:39,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:39,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:39,947 INFO L87 Difference]: Start difference. First operand 16138 states and 51399 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:41,142 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2021-06-12 19:26:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 19:26:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:41,167 INFO L225 Difference]: With dead ends: 18584 [2021-06-12 19:26:41,167 INFO L226 Difference]: Without dead ends: 18575 [2021-06-12 19:26:41,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 19:26:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2021-06-12 19:26:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2021-06-12 19:26:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 3.182408795602199) internal successors, (50944), 16008 states have internal predecessors, (50944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2021-06-12 19:26:41,464 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2021-06-12 19:26:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:41,464 INFO L482 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2021-06-12 19:26:41,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2021-06-12 19:26:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:41,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:41,484 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:41,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-12 19:26:41,684 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1936036589, now seen corresponding path program 405 times [2021-06-12 19:26:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:41,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27944549] [2021-06-12 19:26:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:41,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27944549] [2021-06-12 19:26:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27944549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085460585] [2021-06-12 19:26:41,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:41,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:26:41,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:41,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085460585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:41,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:41,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-12 19:26:41,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272304567] [2021-06-12 19:26:41,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:41,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:41,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:41,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:41,948 INFO L87 Difference]: Start difference. First operand 16009 states and 50944 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:43,037 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2021-06-12 19:26:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 19:26:43,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:43,062 INFO L225 Difference]: With dead ends: 18529 [2021-06-12 19:26:43,062 INFO L226 Difference]: Without dead ends: 18514 [2021-06-12 19:26:43,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 936.5ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 19:26:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2021-06-12 19:26:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2021-06-12 19:26:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 3.1817438349270257) internal successors, (50577), 15896 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2021-06-12 19:26:43,303 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2021-06-12 19:26:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:43,303 INFO L482 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2021-06-12 19:26:43,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2021-06-12 19:26:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:43,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:43,324 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:43,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-12 19:26:43,538 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1771185385, now seen corresponding path program 406 times [2021-06-12 19:26:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:43,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887162050] [2021-06-12 19:26:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:43,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:43,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887162050] [2021-06-12 19:26:43,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887162050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:43,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231080167] [2021-06-12 19:26:43,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:43,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:43,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231080167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:43,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:43,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-12 19:26:43,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659949080] [2021-06-12 19:26:43,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:26:43,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:43,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:26:43,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:43,846 INFO L87 Difference]: Start difference. First operand 15897 states and 50577 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:44,886 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2021-06-12 19:26:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:26:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:44,910 INFO L225 Difference]: With dead ends: 18517 [2021-06-12 19:26:44,910 INFO L226 Difference]: Without dead ends: 18490 [2021-06-12 19:26:44,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 996.2ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:26:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-06-12 19:26:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2021-06-12 19:26:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15779 states, 15778 states have (on average 3.1827227785524146) internal successors, (50217), 15778 states have internal predecessors, (50217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2021-06-12 19:26:45,149 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2021-06-12 19:26:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:45,149 INFO L482 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2021-06-12 19:26:45,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2021-06-12 19:26:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:45,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:45,168 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:45,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-12 19:26:45,368 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash 730949587, now seen corresponding path program 407 times [2021-06-12 19:26:45,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:45,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152193747] [2021-06-12 19:26:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:45,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152193747] [2021-06-12 19:26:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152193747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860251046] [2021-06-12 19:26:45,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:45,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:26:45,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:45,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860251046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:45,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:45,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-12 19:26:45,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665632394] [2021-06-12 19:26:45,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:26:45,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:26:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:26:45,605 INFO L87 Difference]: Start difference. First operand 15779 states and 50217 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:46,520 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2021-06-12 19:26:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 19:26:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:46,544 INFO L225 Difference]: With dead ends: 18160 [2021-06-12 19:26:46,544 INFO L226 Difference]: Without dead ends: 18136 [2021-06-12 19:26:46,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 823.7ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:26:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2021-06-12 19:26:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2021-06-12 19:26:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 15809 states have (on average 3.183123537225631) internal successors, (50322), 15809 states have internal predecessors, (50322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2021-06-12 19:26:46,830 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2021-06-12 19:26:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:46,830 INFO L482 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2021-06-12 19:26:46,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2021-06-12 19:26:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:46,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:46,848 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:47,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:47,049 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 928227975, now seen corresponding path program 408 times [2021-06-12 19:26:47,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:47,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627342500] [2021-06-12 19:26:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:47,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:47,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627342500] [2021-06-12 19:26:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627342500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:47,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303714994] [2021-06-12 19:26:47,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:47,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:26:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:47,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303714994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:47,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:47,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-12 19:26:47,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599908371] [2021-06-12 19:26:47,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:26:47,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:47,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:26:47,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:26:47,310 INFO L87 Difference]: Start difference. First operand 15810 states and 50322 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:48,198 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2021-06-12 19:26:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 19:26:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:48,220 INFO L225 Difference]: With dead ends: 16413 [2021-06-12 19:26:48,220 INFO L226 Difference]: Without dead ends: 16413 [2021-06-12 19:26:48,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 789.3ms TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 19:26:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2021-06-12 19:26:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2021-06-12 19:26:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15703 states, 15702 states have (on average 3.1823971468602728) internal successors, (49970), 15702 states have internal predecessors, (49970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2021-06-12 19:26:48,452 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2021-06-12 19:26:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:48,453 INFO L482 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2021-06-12 19:26:48,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2021-06-12 19:26:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:48,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:48,472 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:48,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-12 19:26:48,672 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash -552061937, now seen corresponding path program 409 times [2021-06-12 19:26:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:48,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325651960] [2021-06-12 19:26:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:48,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:48,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325651960] [2021-06-12 19:26:48,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325651960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:48,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458775488] [2021-06-12 19:26:48,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:48,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:48,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:48,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458775488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:48,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:48,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-12 19:26:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550293867] [2021-06-12 19:26:48,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:26:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:26:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:26:48,913 INFO L87 Difference]: Start difference. First operand 15703 states and 49970 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:49,813 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2021-06-12 19:26:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:26:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:49,834 INFO L225 Difference]: With dead ends: 16653 [2021-06-12 19:26:49,834 INFO L226 Difference]: Without dead ends: 16639 [2021-06-12 19:26:49,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:26:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2021-06-12 19:26:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2021-06-12 19:26:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15440 states, 15439 states have (on average 3.1834315694021633) internal successors, (49149), 15439 states have internal predecessors, (49149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2021-06-12 19:26:50,056 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2021-06-12 19:26:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:50,056 INFO L482 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2021-06-12 19:26:50,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2021-06-12 19:26:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:50,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:50,074 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:50,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:50,275 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1154002553, now seen corresponding path program 410 times [2021-06-12 19:26:50,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:50,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345608519] [2021-06-12 19:26:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:50,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:50,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345608519] [2021-06-12 19:26:50,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345608519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:50,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626629242] [2021-06-12 19:26:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:50,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:50,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:50,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626629242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:50,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:50,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-12 19:26:50,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464899036] [2021-06-12 19:26:50,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:26:50,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:26:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:50,506 INFO L87 Difference]: Start difference. First operand 15440 states and 49149 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:51,353 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2021-06-12 19:26:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 19:26:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:51,376 INFO L225 Difference]: With dead ends: 17145 [2021-06-12 19:26:51,376 INFO L226 Difference]: Without dead ends: 17135 [2021-06-12 19:26:51,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 19:26:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2021-06-12 19:26:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2021-06-12 19:26:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 3.1838157195963888) internal successors, (47961), 15064 states have internal predecessors, (47961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2021-06-12 19:26:51,596 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2021-06-12 19:26:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:51,596 INFO L482 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2021-06-12 19:26:51,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2021-06-12 19:26:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:51,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:51,614 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:51,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-12 19:26:51,815 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:51,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2004703985, now seen corresponding path program 411 times [2021-06-12 19:26:51,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:51,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685333792] [2021-06-12 19:26:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:51,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685333792] [2021-06-12 19:26:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685333792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:51,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463990675] [2021-06-12 19:26:51,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:51,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:26:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:51,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:52,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463990675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-12 19:26:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114965783] [2021-06-12 19:26:52,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:52,055 INFO L87 Difference]: Start difference. First operand 15065 states and 47961 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:52,919 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2021-06-12 19:26:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 19:26:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:52,942 INFO L225 Difference]: With dead ends: 18361 [2021-06-12 19:26:52,943 INFO L226 Difference]: Without dead ends: 18355 [2021-06-12 19:26:52,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 704.6ms TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 19:26:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2021-06-12 19:26:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2021-06-12 19:26:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15150 states, 15149 states have (on average 3.1832464189055383) internal successors, (48223), 15149 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2021-06-12 19:26:53,172 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2021-06-12 19:26:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:53,172 INFO L482 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2021-06-12 19:26:53,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2021-06-12 19:26:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:53,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:53,190 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:53,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-12 19:26:53,390 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:53,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash -231030649, now seen corresponding path program 412 times [2021-06-12 19:26:53,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:53,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771246958] [2021-06-12 19:26:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:53,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771246958] [2021-06-12 19:26:53,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771246958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201458355] [2021-06-12 19:26:53,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:53,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:53,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:53,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:53,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201458355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:53,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:53,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-12 19:26:53,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760701526] [2021-06-12 19:26:53,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:53,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:53,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:53,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:53,596 INFO L87 Difference]: Start difference. First operand 15150 states and 48223 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:54,431 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2021-06-12 19:26:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 19:26:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:54,458 INFO L225 Difference]: With dead ends: 20262 [2021-06-12 19:26:54,458 INFO L226 Difference]: Without dead ends: 20260 [2021-06-12 19:26:54,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:26:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2021-06-12 19:26:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2021-06-12 19:26:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16488 states, 16487 states have (on average 3.178746891490265) internal successors, (52408), 16487 states have internal predecessors, (52408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2021-06-12 19:26:54,723 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2021-06-12 19:26:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:54,723 INFO L482 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2021-06-12 19:26:54,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2021-06-12 19:26:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:54,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:54,746 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:54,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:54,946 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1143646705, now seen corresponding path program 413 times [2021-06-12 19:26:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:54,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975660681] [2021-06-12 19:26:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:55,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:55,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975660681] [2021-06-12 19:26:55,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975660681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:55,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170212815] [2021-06-12 19:26:55,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:55,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:26:55,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:55,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:55,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170212815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:55,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:55,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-12 19:26:55,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522343356] [2021-06-12 19:26:55,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:55,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:55,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:55,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:55,234 INFO L87 Difference]: Start difference. First operand 16488 states and 52408 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:56,081 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2021-06-12 19:26:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 19:26:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:56,108 INFO L225 Difference]: With dead ends: 19932 [2021-06-12 19:26:56,109 INFO L226 Difference]: Without dead ends: 19932 [2021-06-12 19:26:56,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 674.8ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:26:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2021-06-12 19:26:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2021-06-12 19:26:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16989 states have (on average 3.183648242980752) internal successors, (54087), 16989 states have internal predecessors, (54087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2021-06-12 19:26:56,373 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2021-06-12 19:26:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:56,374 INFO L482 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2021-06-12 19:26:56,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2021-06-12 19:26:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:56,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:56,395 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:56,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:56,596 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash -572191899, now seen corresponding path program 414 times [2021-06-12 19:26:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:56,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83359326] [2021-06-12 19:26:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:56,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:56,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83359326] [2021-06-12 19:26:56,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83359326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:56,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339384823] [2021-06-12 19:26:56,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:56,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:26:56,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:56,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339384823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:56,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:56,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-06-12 19:26:56,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096139400] [2021-06-12 19:26:56,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:56,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:56,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:56,801 INFO L87 Difference]: Start difference. First operand 16990 states and 54087 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:58,095 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2021-06-12 19:26:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 19:26:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:58,120 INFO L225 Difference]: With dead ends: 19753 [2021-06-12 19:26:58,120 INFO L226 Difference]: Without dead ends: 19744 [2021-06-12 19:26:58,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 1138.1ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 19:26:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-06-12 19:26:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2021-06-12 19:26:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 3.1820230048618523) internal successors, (53668), 16866 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2021-06-12 19:26:58,383 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2021-06-12 19:26:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:58,383 INFO L482 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2021-06-12 19:26:58,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2021-06-12 19:26:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:26:58,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:58,403 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:58,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:58,603 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash -36962097, now seen corresponding path program 415 times [2021-06-12 19:26:58,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:58,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705692716] [2021-06-12 19:26:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:58,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:58,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705692716] [2021-06-12 19:26:58,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705692716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:58,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160586822] [2021-06-12 19:26:58,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:26:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:58,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160586822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:58,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:58,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-06-12 19:26:58,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415696140] [2021-06-12 19:26:58,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:58,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:58,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:58,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:58,828 INFO L87 Difference]: Start difference. First operand 16867 states and 53668 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:26:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:59,998 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2021-06-12 19:26:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 19:26:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:26:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:00,024 INFO L225 Difference]: With dead ends: 19710 [2021-06-12 19:27:00,024 INFO L226 Difference]: Without dead ends: 19698 [2021-06-12 19:27:00,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 1020.1ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 19:27:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2021-06-12 19:27:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2021-06-12 19:27:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 3.181476397923256) internal successors, (53312), 16757 states have internal predecessors, (53312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2021-06-12 19:27:00,281 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2021-06-12 19:27:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:00,281 INFO L482 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2021-06-12 19:27:00,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2021-06-12 19:27:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:00,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:00,300 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:00,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable708 [2021-06-12 19:27:00,501 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash -624707419, now seen corresponding path program 416 times [2021-06-12 19:27:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:00,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879337156] [2021-06-12 19:27:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:00,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:00,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879337156] [2021-06-12 19:27:00,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879337156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:00,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973024712] [2021-06-12 19:27:00,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:00,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:00,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:00,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973024712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:00,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:00,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-12 19:27:00,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144753] [2021-06-12 19:27:00,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:00,821 INFO L87 Difference]: Start difference. First operand 16758 states and 53312 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:01,920 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2021-06-12 19:27:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 19:27:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:01,947 INFO L225 Difference]: With dead ends: 19755 [2021-06-12 19:27:01,947 INFO L226 Difference]: Without dead ends: 19737 [2021-06-12 19:27:01,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 1052.9ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 19:27:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2021-06-12 19:27:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2021-06-12 19:27:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16856 states, 16855 states have (on average 3.18119252447345) internal successors, (53619), 16855 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2021-06-12 19:27:02,210 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2021-06-12 19:27:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:02,210 INFO L482 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2021-06-12 19:27:02,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2021-06-12 19:27:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:02,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:02,230 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:02,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:02,430 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1664943217, now seen corresponding path program 417 times [2021-06-12 19:27:02,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:02,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299067869] [2021-06-12 19:27:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:02,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:02,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299067869] [2021-06-12 19:27:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299067869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:02,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931109825] [2021-06-12 19:27:02,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:02,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:27:02,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:02,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931109825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:02,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-12 19:27:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996136032] [2021-06-12 19:27:02,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:27:02,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:27:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:27:02,673 INFO L87 Difference]: Start difference. First operand 16856 states and 53619 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:03,758 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2021-06-12 19:27:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 19:27:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:03,785 INFO L225 Difference]: With dead ends: 20000 [2021-06-12 19:27:03,785 INFO L226 Difference]: Without dead ends: 19976 [2021-06-12 19:27:03,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 972.9ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:27:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2021-06-12 19:27:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2021-06-12 19:27:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 17036 states have (on average 3.181908898802536) internal successors, (54207), 17036 states have internal predecessors, (54207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2021-06-12 19:27:04,050 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2021-06-12 19:27:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:04,050 INFO L482 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2021-06-12 19:27:04,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2021-06-12 19:27:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:04,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:04,070 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:04,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-12 19:27:04,270 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 447485413, now seen corresponding path program 418 times [2021-06-12 19:27:04,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:04,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332883510] [2021-06-12 19:27:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:04,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:04,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332883510] [2021-06-12 19:27:04,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332883510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:04,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508241040] [2021-06-12 19:27:04,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:04,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:04,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:04,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:04,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:04,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508241040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:04,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:04,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-12 19:27:04,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427155337] [2021-06-12 19:27:04,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:27:04,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:27:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:27:04,525 INFO L87 Difference]: Start difference. First operand 17037 states and 54207 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:05,429 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2021-06-12 19:27:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 19:27:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:05,456 INFO L225 Difference]: With dead ends: 19762 [2021-06-12 19:27:05,456 INFO L226 Difference]: Without dead ends: 19732 [2021-06-12 19:27:05,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 19:27:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2021-06-12 19:27:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2021-06-12 19:27:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 17070 states have (on average 3.1825424721734037) internal successors, (54326), 17070 states have internal predecessors, (54326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2021-06-12 19:27:05,721 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2021-06-12 19:27:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:05,721 INFO L482 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2021-06-12 19:27:05,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2021-06-12 19:27:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:05,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:05,741 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:05,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:05,941 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1685657901, now seen corresponding path program 419 times [2021-06-12 19:27:05,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:05,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558524945] [2021-06-12 19:27:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:06,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558524945] [2021-06-12 19:27:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558524945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288005707] [2021-06-12 19:27:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:06,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:27:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:06,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:06,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288005707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:06,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:06,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 19:27:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390945281] [2021-06-12 19:27:06,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:27:06,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:06,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:27:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:06,313 INFO L87 Difference]: Start difference. First operand 17071 states and 54326 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:07,301 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2021-06-12 19:27:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:27:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:07,327 INFO L225 Difference]: With dead ends: 18326 [2021-06-12 19:27:07,327 INFO L226 Difference]: Without dead ends: 18326 [2021-06-12 19:27:07,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 19:27:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2021-06-12 19:27:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2021-06-12 19:27:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 17147 states have (on average 3.1787484691199626) internal successors, (54506), 17147 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2021-06-12 19:27:07,590 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2021-06-12 19:27:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:07,590 INFO L482 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2021-06-12 19:27:07,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2021-06-12 19:27:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:07,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:07,610 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:07,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-12 19:27:07,811 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash 518617555, now seen corresponding path program 420 times [2021-06-12 19:27:07,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:07,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846002259] [2021-06-12 19:27:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:07,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846002259] [2021-06-12 19:27:07,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846002259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498687388] [2021-06-12 19:27:07,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:07,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:27:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:08,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498687388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:08,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:08,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-12 19:27:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232338581] [2021-06-12 19:27:08,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:27:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:27:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:27:08,070 INFO L87 Difference]: Start difference. First operand 17148 states and 54506 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:08,928 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2021-06-12 19:27:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 19:27:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:08,956 INFO L225 Difference]: With dead ends: 19278 [2021-06-12 19:27:08,956 INFO L226 Difference]: Without dead ends: 19278 [2021-06-12 19:27:08,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:27:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-06-12 19:27:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2021-06-12 19:27:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.1773172135866434) internal successors, (55190), 17370 states have internal predecessors, (55190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2021-06-12 19:27:09,283 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2021-06-12 19:27:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:09,283 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2021-06-12 19:27:09,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2021-06-12 19:27:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:09,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:09,304 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:09,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:09,504 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash 728270547, now seen corresponding path program 421 times [2021-06-12 19:27:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:09,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557215795] [2021-06-12 19:27:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:09,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:09,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557215795] [2021-06-12 19:27:09,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557215795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:09,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747733698] [2021-06-12 19:27:09,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:09,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:09,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:09,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747733698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:09,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:09,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-12 19:27:09,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182290786] [2021-06-12 19:27:09,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:27:09,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:27:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:27:09,760 INFO L87 Difference]: Start difference. First operand 17371 states and 55190 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:10,594 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2021-06-12 19:27:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:27:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:10,623 INFO L225 Difference]: With dead ends: 20178 [2021-06-12 19:27:10,623 INFO L226 Difference]: Without dead ends: 20178 [2021-06-12 19:27:10,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:27:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2021-06-12 19:27:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2021-06-12 19:27:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17685 states, 17684 states have (on average 3.17852295860665) internal successors, (56209), 17684 states have internal predecessors, (56209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2021-06-12 19:27:10,898 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2021-06-12 19:27:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:10,898 INFO L482 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2021-06-12 19:27:10,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2021-06-12 19:27:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:10,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:10,919 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:11,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:11,119 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1012128211, now seen corresponding path program 422 times [2021-06-12 19:27:11,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:11,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373260516] [2021-06-12 19:27:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:11,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373260516] [2021-06-12 19:27:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373260516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595443998] [2021-06-12 19:27:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:11,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:11,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:11,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595443998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:11,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:11,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-12 19:27:11,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119024089] [2021-06-12 19:27:11,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:11,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:11,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:11,355 INFO L87 Difference]: Start difference. First operand 17685 states and 56209 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:12,281 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2021-06-12 19:27:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:27:12,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:12,310 INFO L225 Difference]: With dead ends: 21110 [2021-06-12 19:27:12,310 INFO L226 Difference]: Without dead ends: 21110 [2021-06-12 19:27:12,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:27:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2021-06-12 19:27:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2021-06-12 19:27:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18003 states, 18002 states have (on average 3.180702144206199) internal successors, (57259), 18002 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2021-06-12 19:27:12,597 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2021-06-12 19:27:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:12,597 INFO L482 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2021-06-12 19:27:12,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2021-06-12 19:27:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:12,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:12,617 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:12,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:12,817 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2026756397, now seen corresponding path program 423 times [2021-06-12 19:27:12,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:12,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124376537] [2021-06-12 19:27:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:12,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124376537] [2021-06-12 19:27:12,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124376537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195376518] [2021-06-12 19:27:12,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:12,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:27:12,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:13,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195376518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:13,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:13,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-12 19:27:13,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099768856] [2021-06-12 19:27:13,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:13,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:13,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:13,032 INFO L87 Difference]: Start difference. First operand 18003 states and 57259 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:13,981 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2021-06-12 19:27:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 19:27:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:14,012 INFO L225 Difference]: With dead ends: 22604 [2021-06-12 19:27:14,012 INFO L226 Difference]: Without dead ends: 22604 [2021-06-12 19:27:14,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 742.3ms TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 19:27:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2021-06-12 19:27:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2021-06-12 19:27:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18723 states have (on average 3.182395983549645) internal successors, (59584), 18723 states have internal predecessors, (59584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2021-06-12 19:27:14,397 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2021-06-12 19:27:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:14,397 INFO L482 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2021-06-12 19:27:14,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2021-06-12 19:27:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:14,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:14,421 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:14,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-12 19:27:14,621 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1893087699, now seen corresponding path program 424 times [2021-06-12 19:27:14,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:14,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037476526] [2021-06-12 19:27:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:14,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:14,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037476526] [2021-06-12 19:27:14,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037476526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:14,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144944778] [2021-06-12 19:27:14,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:14,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:14,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144944778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:14,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:14,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-12 19:27:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581361491] [2021-06-12 19:27:14,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:27:14,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:27:14,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:27:14,825 INFO L87 Difference]: Start difference. First operand 18724 states and 59584 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:15,721 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2021-06-12 19:27:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 19:27:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:15,761 INFO L225 Difference]: With dead ends: 26877 [2021-06-12 19:27:15,762 INFO L226 Difference]: Without dead ends: 26877 [2021-06-12 19:27:15,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:27:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2021-06-12 19:27:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2021-06-12 19:27:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 23209 states have (on average 3.1894092808824164) internal successors, (74023), 23209 states have internal predecessors, (74023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2021-06-12 19:27:16,169 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2021-06-12 19:27:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:16,169 INFO L482 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2021-06-12 19:27:16,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2021-06-12 19:27:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:16,195 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:16,195 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:16,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:16,395 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:16,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1830424791, now seen corresponding path program 425 times [2021-06-12 19:27:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:16,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873945641] [2021-06-12 19:27:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:16,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873945641] [2021-06-12 19:27:16,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873945641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79973268] [2021-06-12 19:27:16,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:16,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:27:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:16,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79973268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:16,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:16,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-06-12 19:27:16,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929820873] [2021-06-12 19:27:16,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:27:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:27:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:27:16,626 INFO L87 Difference]: Start difference. First operand 23210 states and 74023 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:18,153 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2021-06-12 19:27:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 19:27:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:18,190 INFO L225 Difference]: With dead ends: 25835 [2021-06-12 19:27:18,190 INFO L226 Difference]: Without dead ends: 25829 [2021-06-12 19:27:18,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 1300.8ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 19:27:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2021-06-12 19:27:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2021-06-12 19:27:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23125 states, 23124 states have (on average 3.187900017298045) internal successors, (73717), 23124 states have internal predecessors, (73717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2021-06-12 19:27:18,590 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2021-06-12 19:27:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:18,590 INFO L482 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2021-06-12 19:27:18,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2021-06-12 19:27:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:18,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:18,617 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:18,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:18,817 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1295194989, now seen corresponding path program 426 times [2021-06-12 19:27:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:18,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644667954] [2021-06-12 19:27:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:18,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:18,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644667954] [2021-06-12 19:27:18,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644667954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:18,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440727515] [2021-06-12 19:27:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:18,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:27:18,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:18,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:19,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440727515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:19,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:19,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-06-12 19:27:19,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794849200] [2021-06-12 19:27:19,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:19,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:19,029 INFO L87 Difference]: Start difference. First operand 23125 states and 73717 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:20,444 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2021-06-12 19:27:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 19:27:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:20,485 INFO L225 Difference]: With dead ends: 25817 [2021-06-12 19:27:20,485 INFO L226 Difference]: Without dead ends: 25805 [2021-06-12 19:27:20,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4219 ImplicationChecksByTransitivity, 1185.8ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 19:27:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2021-06-12 19:27:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2021-06-12 19:27:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 3.188536300272739) internal successors, (73652), 23099 states have internal predecessors, (73652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2021-06-12 19:27:20,871 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2021-06-12 19:27:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:20,871 INFO L482 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2021-06-12 19:27:20,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2021-06-12 19:27:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:20,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:20,897 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:21,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:21,098 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1882940311, now seen corresponding path program 427 times [2021-06-12 19:27:21,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:21,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681166087] [2021-06-12 19:27:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:21,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681166087] [2021-06-12 19:27:21,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681166087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169891450] [2021-06-12 19:27:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:21,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169891450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:21,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:21,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-06-12 19:27:21,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901162724] [2021-06-12 19:27:21,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:21,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:21,320 INFO L87 Difference]: Start difference. First operand 23100 states and 73652 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:22,645 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2021-06-12 19:27:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 19:27:22,645 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:22,677 INFO L225 Difference]: With dead ends: 25937 [2021-06-12 19:27:22,677 INFO L226 Difference]: Without dead ends: 25919 [2021-06-12 19:27:22,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 19:27:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2021-06-12 19:27:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2021-06-12 19:27:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 3.18916817828453) internal successors, (73842), 23154 states have internal predecessors, (73842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2021-06-12 19:27:23,032 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2021-06-12 19:27:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:23,032 INFO L482 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2021-06-12 19:27:23,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2021-06-12 19:27:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:23,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:23,057 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:23,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-12 19:27:23,257 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:23,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:23,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1371791187, now seen corresponding path program 428 times [2021-06-12 19:27:23,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:23,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042797536] [2021-06-12 19:27:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:23,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042797536] [2021-06-12 19:27:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042797536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693366057] [2021-06-12 19:27:23,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:23,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:23,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693366057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:23,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:23,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-12 19:27:23,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075323211] [2021-06-12 19:27:23,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:27:23,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:27:23,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:27:23,496 INFO L87 Difference]: Start difference. First operand 23155 states and 73842 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:24,607 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2021-06-12 19:27:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:27:24,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:24,647 INFO L225 Difference]: With dead ends: 26264 [2021-06-12 19:27:24,647 INFO L226 Difference]: Without dead ends: 26240 [2021-06-12 19:27:24,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 964.9ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 19:27:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2021-06-12 19:27:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2021-06-12 19:27:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23691 states, 23690 states have (on average 3.1908400168847617) internal successors, (75591), 23690 states have internal predecessors, (75591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2021-06-12 19:27:25,111 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2021-06-12 19:27:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:25,111 INFO L482 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2021-06-12 19:27:25,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2021-06-12 19:27:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:25,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:25,137 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:25,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-12 19:27:25,337 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash -810747479, now seen corresponding path program 429 times [2021-06-12 19:27:25,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:25,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196197716] [2021-06-12 19:27:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:25,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:25,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196197716] [2021-06-12 19:27:25,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196197716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:25,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534512873] [2021-06-12 19:27:25,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:25,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:27:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:25,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:25,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534512873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:25,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:25,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-12 19:27:25,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3205668] [2021-06-12 19:27:25,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:27:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:27:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:27:25,592 INFO L87 Difference]: Start difference. First operand 23691 states and 75591 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:26,653 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2021-06-12 19:27:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 19:27:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:26,694 INFO L225 Difference]: With dead ends: 26956 [2021-06-12 19:27:26,694 INFO L226 Difference]: Without dead ends: 26926 [2021-06-12 19:27:26,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 921.3ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:27:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-06-12 19:27:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2021-06-12 19:27:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24343 states, 24342 states have (on average 3.1921370470791226) internal successors, (77703), 24342 states have internal predecessors, (77703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2021-06-12 19:27:27,278 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2021-06-12 19:27:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:27,278 INFO L482 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2021-06-12 19:27:27,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2021-06-12 19:27:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 19:27:27,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:27,310 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:27,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-12 19:27:27,510 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash 250030611, now seen corresponding path program 430 times [2021-06-12 19:27:27,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:27,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690438426] [2021-06-12 19:27:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:27,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690438426] [2021-06-12 19:27:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690438426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065583707] [2021-06-12 19:27:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:27,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:27:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065583707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:27,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:27,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 19:27:27,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339360562] [2021-06-12 19:27:27,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:27:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:27:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:27,840 INFO L87 Difference]: Start difference. First operand 24343 states and 77703 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:28,869 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2021-06-12 19:27:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 19:27:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 19:27:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:28,910 INFO L225 Difference]: With dead ends: 26813 [2021-06-12 19:27:28,910 INFO L226 Difference]: Without dead ends: 26777 [2021-06-12 19:27:28,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 19:27:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2021-06-12 19:27:29,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2021-06-12 19:27:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 24406 states have (on average 3.1917561255428994) internal successors, (77898), 24406 states have internal predecessors, (77898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2021-06-12 19:27:29,313 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2021-06-12 19:27:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:29,313 INFO L482 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2021-06-12 19:27:29,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2021-06-12 19:27:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:29,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:29,343 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:29,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:29,544 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1425864693, now seen corresponding path program 431 times [2021-06-12 19:27:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:29,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955022594] [2021-06-12 19:27:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:29,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955022594] [2021-06-12 19:27:29,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955022594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942839893] [2021-06-12 19:27:29,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:29,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:27:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:29,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942839893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:29,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:29,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:27:29,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478632367] [2021-06-12 19:27:29,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:29,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:29,930 INFO L87 Difference]: Start difference. First operand 24407 states and 77898 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:30,784 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2021-06-12 19:27:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:27:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:30,821 INFO L225 Difference]: With dead ends: 24899 [2021-06-12 19:27:30,821 INFO L226 Difference]: Without dead ends: 24867 [2021-06-12 19:27:30,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:27:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-12 19:27:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2021-06-12 19:27:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 3.185145845248795) internal successors, (77966), 24478 states have internal predecessors, (77966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2021-06-12 19:27:31,201 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2021-06-12 19:27:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:31,201 INFO L482 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2021-06-12 19:27:31,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2021-06-12 19:27:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:31,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:31,231 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:31,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:31,431 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:31,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash 983845119, now seen corresponding path program 432 times [2021-06-12 19:27:31,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:31,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222425113] [2021-06-12 19:27:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:31,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:31,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222425113] [2021-06-12 19:27:31,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222425113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:31,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216265286] [2021-06-12 19:27:31,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:31,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:27:31,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:31,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216265286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:31,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:31,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-12 19:27:31,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525917379] [2021-06-12 19:27:31,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:31,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:31,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:31,825 INFO L87 Difference]: Start difference. First operand 24479 states and 77966 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:32,356 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2021-06-12 19:27:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:27:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:32,389 INFO L225 Difference]: With dead ends: 25039 [2021-06-12 19:27:32,389 INFO L226 Difference]: Without dead ends: 25032 [2021-06-12 19:27:32,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2021-06-12 19:27:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2021-06-12 19:27:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24640 states, 24639 states have (on average 3.186979991071066) internal successors, (78524), 24639 states have internal predecessors, (78524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2021-06-12 19:27:32,767 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2021-06-12 19:27:32,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:32,767 INFO L482 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2021-06-12 19:27:32,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2021-06-12 19:27:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:32,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:32,793 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:32,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:32,994 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1696419453, now seen corresponding path program 433 times [2021-06-12 19:27:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:32,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881036146] [2021-06-12 19:27:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:33,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881036146] [2021-06-12 19:27:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881036146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753787048] [2021-06-12 19:27:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:33,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:33,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753787048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:33,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:33,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-12 19:27:33,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395394976] [2021-06-12 19:27:33,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:33,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:33,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:33,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:33,384 INFO L87 Difference]: Start difference. First operand 24640 states and 78524 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:33,859 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2021-06-12 19:27:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:27:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:33,897 INFO L225 Difference]: With dead ends: 25025 [2021-06-12 19:27:33,897 INFO L226 Difference]: Without dead ends: 25009 [2021-06-12 19:27:33,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2021-06-12 19:27:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2021-06-12 19:27:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-12 19:27:34,279 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-12 19:27:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:34,279 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-12 19:27:34,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-12 19:27:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:34,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:34,306 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:34,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-12 19:27:34,506 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1555299925, now seen corresponding path program 434 times [2021-06-12 19:27:34,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:34,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114480607] [2021-06-12 19:27:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:34,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:34,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114480607] [2021-06-12 19:27:34,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114480607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256365412] [2021-06-12 19:27:34,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:34,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:34,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:35,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256365412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:35,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:35,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:27:35,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036351193] [2021-06-12 19:27:35,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:35,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:35,015 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:35,462 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2021-06-12 19:27:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:27:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:35,500 INFO L225 Difference]: With dead ends: 24884 [2021-06-12 19:27:35,500 INFO L226 Difference]: Without dead ends: 24877 [2021-06-12 19:27:35,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2021-06-12 19:27:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2021-06-12 19:27:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-12 19:27:35,883 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-12 19:27:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:35,883 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-12 19:27:35,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-12 19:27:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:35,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:35,915 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:36,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-12 19:27:36,115 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2090529727, now seen corresponding path program 435 times [2021-06-12 19:27:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:36,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444159907] [2021-06-12 19:27:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:36,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444159907] [2021-06-12 19:27:36,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444159907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142703835] [2021-06-12 19:27:36,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:36,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:27:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:36,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142703835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:36,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:36,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:27:36,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229260194] [2021-06-12 19:27:36,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:36,634 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:37,220 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2021-06-12 19:27:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:27:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:37,262 INFO L225 Difference]: With dead ends: 24901 [2021-06-12 19:27:37,263 INFO L226 Difference]: Without dead ends: 24894 [2021-06-12 19:27:37,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-06-12 19:27:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2021-06-12 19:27:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-12 19:27:37,694 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-12 19:27:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:37,694 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-12 19:27:37,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-12 19:27:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:37,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:37,721 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:37,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:37,921 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1502784405, now seen corresponding path program 436 times [2021-06-12 19:27:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:37,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884280386] [2021-06-12 19:27:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:38,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884280386] [2021-06-12 19:27:38,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884280386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696558295] [2021-06-12 19:27:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:38,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:38,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:38,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:38,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696558295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:38,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:38,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:27:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719311571] [2021-06-12 19:27:38,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:38,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:38,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:38,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:38,307 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:38,852 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2021-06-12 19:27:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:27:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:38,890 INFO L225 Difference]: With dead ends: 24921 [2021-06-12 19:27:38,890 INFO L226 Difference]: Without dead ends: 24914 [2021-06-12 19:27:38,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:27:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2021-06-12 19:27:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2021-06-12 19:27:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-12 19:27:39,282 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-12 19:27:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:39,282 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-12 19:27:39,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-12 19:27:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:39,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:39,310 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:39,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:39,511 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:39,511 INFO L82 PathProgramCache]: Analyzing trace with hash 462548607, now seen corresponding path program 437 times [2021-06-12 19:27:39,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:39,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339008395] [2021-06-12 19:27:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:39,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:39,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339008395] [2021-06-12 19:27:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339008395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:39,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332931985] [2021-06-12 19:27:39,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:39,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:27:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332931985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:40,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:27:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732836208] [2021-06-12 19:27:40,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:40,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:40,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:40,119 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:40,668 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2021-06-12 19:27:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:27:40,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:40,708 INFO L225 Difference]: With dead ends: 24944 [2021-06-12 19:27:40,708 INFO L226 Difference]: Without dead ends: 24937 [2021-06-12 19:27:40,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:27:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2021-06-12 19:27:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2021-06-12 19:27:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-12 19:27:41,092 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-12 19:27:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:41,092 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-12 19:27:41,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-12 19:27:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:41,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:41,120 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:41,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-12 19:27:41,321 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1719990059, now seen corresponding path program 438 times [2021-06-12 19:27:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:41,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23804197] [2021-06-12 19:27:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:41,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:41,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23804197] [2021-06-12 19:27:41,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23804197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:41,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144883436] [2021-06-12 19:27:41,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:41,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:27:41,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:41,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144883436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:41,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:41,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:27:41,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040741889] [2021-06-12 19:27:41,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:41,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:41,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:41,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:41,706 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:42,420 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2021-06-12 19:27:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:27:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:42,459 INFO L225 Difference]: With dead ends: 24802 [2021-06-12 19:27:42,459 INFO L226 Difference]: Without dead ends: 24795 [2021-06-12 19:27:42,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:27:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2021-06-12 19:27:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2021-06-12 19:27:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-06-12 19:27:42,858 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-06-12 19:27:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:42,858 INFO L482 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-06-12 19:27:42,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-06-12 19:27:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:42,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:42,886 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:43,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:43,087 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1617763643, now seen corresponding path program 439 times [2021-06-12 19:27:43,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:43,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225512215] [2021-06-12 19:27:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:43,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:43,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225512215] [2021-06-12 19:27:43,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225512215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:43,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440475457] [2021-06-12 19:27:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:43,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440475457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:43,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:43,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-12 19:27:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482494827] [2021-06-12 19:27:43,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:43,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:43,548 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:43,995 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2021-06-12 19:27:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:27:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:44,026 INFO L225 Difference]: With dead ends: 25074 [2021-06-12 19:27:44,026 INFO L226 Difference]: Without dead ends: 25067 [2021-06-12 19:27:44,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:27:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2021-06-12 19:27:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2021-06-12 19:27:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1872668288726684) internal successors, (78598), 24660 states have internal predecessors, (78598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2021-06-12 19:27:44,400 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2021-06-12 19:27:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:44,400 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2021-06-12 19:27:44,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2021-06-12 19:27:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:44,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:44,427 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:44,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:44,628 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1062500929, now seen corresponding path program 440 times [2021-06-12 19:27:44,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:44,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297946374] [2021-06-12 19:27:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:44,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:44,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297946374] [2021-06-12 19:27:44,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297946374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:44,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981141559] [2021-06-12 19:27:44,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:44,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:44,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:44,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:45,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981141559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:45,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:45,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-12 19:27:45,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125461309] [2021-06-12 19:27:45,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:45,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:45,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:45,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:45,086 INFO L87 Difference]: Start difference. First operand 24661 states and 78598 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:45,455 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2021-06-12 19:27:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:27:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:45,492 INFO L225 Difference]: With dead ends: 25075 [2021-06-12 19:27:45,492 INFO L226 Difference]: Without dead ends: 25066 [2021-06-12 19:27:45,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2021-06-12 19:27:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2021-06-12 19:27:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-06-12 19:27:45,890 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-06-12 19:27:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:45,890 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-06-12 19:27:45,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-06-12 19:27:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:45,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:45,917 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:46,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-12 19:27:46,117 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1153172539, now seen corresponding path program 441 times [2021-06-12 19:27:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:46,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713854261] [2021-06-12 19:27:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:46,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713854261] [2021-06-12 19:27:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713854261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899976379] [2021-06-12 19:27:46,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:46,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:27:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:46,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899976379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:46,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:46,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-12 19:27:46,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570720522] [2021-06-12 19:27:46,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:46,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:46,564 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:47,019 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2021-06-12 19:27:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:27:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:47,048 INFO L225 Difference]: With dead ends: 24947 [2021-06-12 19:27:47,048 INFO L226 Difference]: Without dead ends: 24940 [2021-06-12 19:27:47,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:27:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-06-12 19:27:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2021-06-12 19:27:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-06-12 19:27:47,418 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-06-12 19:27:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:47,418 INFO L482 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-06-12 19:27:47,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-06-12 19:27:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:47,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:47,444 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-12 19:27:47,645 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash -205598593, now seen corresponding path program 442 times [2021-06-12 19:27:47,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814595730] [2021-06-12 19:27:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:47,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814595730] [2021-06-12 19:27:47,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814595730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:47,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025548185] [2021-06-12 19:27:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:47,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:47,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:48,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025548185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:48,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:48,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-12 19:27:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173797727] [2021-06-12 19:27:48,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:48,061 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:48,503 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2021-06-12 19:27:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:27:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:48,540 INFO L225 Difference]: With dead ends: 25694 [2021-06-12 19:27:48,540 INFO L226 Difference]: Without dead ends: 25677 [2021-06-12 19:27:48,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2021-06-12 19:27:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2021-06-12 19:27:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 3.1924058710912573) internal successors, (80040), 25072 states have internal predecessors, (80040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2021-06-12 19:27:48,973 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2021-06-12 19:27:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:48,973 INFO L482 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2021-06-12 19:27:48,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2021-06-12 19:27:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:49,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:49,002 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:49,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:49,202 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1409104131, now seen corresponding path program 443 times [2021-06-12 19:27:49,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:49,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610981277] [2021-06-12 19:27:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610981277] [2021-06-12 19:27:49,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610981277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482837804] [2021-06-12 19:27:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:49,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:27:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:49,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482837804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:49,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:49,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-12 19:27:49,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255373834] [2021-06-12 19:27:49,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:49,614 INFO L87 Difference]: Start difference. First operand 25073 states and 80040 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:50,144 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2021-06-12 19:27:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:27:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:50,182 INFO L225 Difference]: With dead ends: 25700 [2021-06-12 19:27:50,182 INFO L226 Difference]: Without dead ends: 25682 [2021-06-12 19:27:50,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2021-06-12 19:27:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2021-06-12 19:27:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24970 states, 24969 states have (on average 3.1887140053666547) internal successors, (79619), 24969 states have internal predecessors, (79619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2021-06-12 19:27:50,584 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2021-06-12 19:27:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:50,584 INFO L482 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2021-06-12 19:27:50,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2021-06-12 19:27:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:50,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:50,611 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:50,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-12 19:27:50,812 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -670189697, now seen corresponding path program 444 times [2021-06-12 19:27:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:50,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644964093] [2021-06-12 19:27:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:50,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644964093] [2021-06-12 19:27:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644964093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894393307] [2021-06-12 19:27:50,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:51,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:27:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:51,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894393307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:51,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:51,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:27:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918451154] [2021-06-12 19:27:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:51,233 INFO L87 Difference]: Start difference. First operand 24970 states and 79619 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:51,715 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2021-06-12 19:27:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:27:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:51,755 INFO L225 Difference]: With dead ends: 25480 [2021-06-12 19:27:51,755 INFO L226 Difference]: Without dead ends: 25458 [2021-06-12 19:27:51,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2021-06-12 19:27:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2021-06-12 19:27:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-06-12 19:27:52,219 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-06-12 19:27:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:52,219 INFO L482 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-06-12 19:27:52,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-06-12 19:27:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:52,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:52,251 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:52,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-12 19:27:52,471 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash -703788925, now seen corresponding path program 445 times [2021-06-12 19:27:52,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:52,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200001732] [2021-06-12 19:27:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:52,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:52,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200001732] [2021-06-12 19:27:52,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200001732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:52,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827239598] [2021-06-12 19:27:52,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:52,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827239598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:52,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:52,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:27:52,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458407059] [2021-06-12 19:27:52,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:52,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:52,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:52,917 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:53,407 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2021-06-12 19:27:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:27:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:53,443 INFO L225 Difference]: With dead ends: 25309 [2021-06-12 19:27:53,443 INFO L226 Difference]: Without dead ends: 25302 [2021-06-12 19:27:53,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2021-06-12 19:27:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2021-06-12 19:27:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-06-12 19:27:53,839 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-06-12 19:27:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:53,839 INFO L482 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-06-12 19:27:53,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-06-12 19:27:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:53,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:53,866 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:54,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:54,066 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash 323843797, now seen corresponding path program 446 times [2021-06-12 19:27:54,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:54,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274866542] [2021-06-12 19:27:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:54,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:54,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274866542] [2021-06-12 19:27:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274866542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:54,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119474479] [2021-06-12 19:27:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:54,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119474479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:54,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:54,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-12 19:27:54,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947039083] [2021-06-12 19:27:54,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:54,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:54,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:54,511 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:54,870 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2021-06-12 19:27:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:27:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:54,910 INFO L225 Difference]: With dead ends: 25226 [2021-06-12 19:27:54,911 INFO L226 Difference]: Without dead ends: 25213 [2021-06-12 19:27:54,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:27:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2021-06-12 19:27:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2021-06-12 19:27:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 24913 states have (on average 3.1877333119255007) internal successors, (79416), 24913 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2021-06-12 19:27:55,317 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2021-06-12 19:27:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:55,317 INFO L482 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2021-06-12 19:27:55,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2021-06-12 19:27:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:55,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:55,344 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:55,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:55,545 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:55,545 INFO L82 PathProgramCache]: Analyzing trace with hash -895253061, now seen corresponding path program 447 times [2021-06-12 19:27:55,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:55,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403515469] [2021-06-12 19:27:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:55,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:55,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403515469] [2021-06-12 19:27:55,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403515469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:55,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088884902] [2021-06-12 19:27:55,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:55,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:27:55,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:55,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088884902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:55,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:55,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-12 19:27:55,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121708968] [2021-06-12 19:27:55,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:55,956 INFO L87 Difference]: Start difference. First operand 24914 states and 79416 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:56,473 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2021-06-12 19:27:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:27:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:56,511 INFO L225 Difference]: With dead ends: 26019 [2021-06-12 19:27:56,511 INFO L226 Difference]: Without dead ends: 26002 [2021-06-12 19:27:56,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2021-06-12 19:27:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2021-06-12 19:27:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25397 states, 25396 states have (on average 3.193416286029296) internal successors, (81100), 25396 states have internal predecessors, (81100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2021-06-12 19:27:56,928 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2021-06-12 19:27:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:56,929 INFO L482 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2021-06-12 19:27:56,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2021-06-12 19:27:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:56,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:56,957 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:57,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-12 19:27:57,157 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 719449663, now seen corresponding path program 448 times [2021-06-12 19:27:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:57,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807889245] [2021-06-12 19:27:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:57,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:57,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807889245] [2021-06-12 19:27:57,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807889245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:57,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607275937] [2021-06-12 19:27:57,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:57,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:57,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:57,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607275937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:57,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:57,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-12 19:27:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163957987] [2021-06-12 19:27:57,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:27:57,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:27:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:27:57,562 INFO L87 Difference]: Start difference. First operand 25397 states and 81100 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:57,999 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2021-06-12 19:27:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:27:58,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:58,038 INFO L225 Difference]: With dead ends: 26023 [2021-06-12 19:27:58,038 INFO L226 Difference]: Without dead ends: 26005 [2021-06-12 19:27:58,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2021-06-12 19:27:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2021-06-12 19:27:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25282 states, 25281 states have (on average 3.189628574819034) internal successors, (80637), 25281 states have internal predecessors, (80637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2021-06-12 19:27:58,454 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2021-06-12 19:27:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:58,454 INFO L482 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2021-06-12 19:27:58,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2021-06-12 19:27:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:27:58,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:58,482 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:58,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-06-12 19:27:58,683 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1359844165, now seen corresponding path program 449 times [2021-06-12 19:27:58,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:58,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156357554] [2021-06-12 19:27:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:58,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:58,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156357554] [2021-06-12 19:27:58,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156357554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:58,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839722567] [2021-06-12 19:27:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:58,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:27:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:27:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:59,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839722567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:59,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:59,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:27:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566681410] [2021-06-12 19:27:59,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:27:59,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:27:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:59,090 INFO L87 Difference]: Start difference. First operand 25282 states and 80637 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:27:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:59,656 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2021-06-12 19:27:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:27:59,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:27:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:59,695 INFO L225 Difference]: With dead ends: 25873 [2021-06-12 19:27:59,695 INFO L226 Difference]: Without dead ends: 25851 [2021-06-12 19:27:59,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2021-06-12 19:28:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2021-06-12 19:28:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25224 states, 25223 states have (on average 3.1875669032232485) internal successors, (80400), 25223 states have internal predecessors, (80400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2021-06-12 19:28:00,121 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2021-06-12 19:28:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:00,121 INFO L482 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2021-06-12 19:28:00,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2021-06-12 19:28:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:00,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:00,149 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:00,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-06-12 19:28:00,349 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:00,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1393443393, now seen corresponding path program 450 times [2021-06-12 19:28:00,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:00,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586860127] [2021-06-12 19:28:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:00,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:00,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586860127] [2021-06-12 19:28:00,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586860127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:00,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86067285] [2021-06-12 19:28:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:00,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:28:00,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:00,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:00,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86067285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:00,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:00,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:28:00,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139636610] [2021-06-12 19:28:00,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:00,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:00,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:00,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:00,755 INFO L87 Difference]: Start difference. First operand 25224 states and 80400 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:01,244 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2021-06-12 19:28:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:28:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:01,285 INFO L225 Difference]: With dead ends: 25707 [2021-06-12 19:28:01,286 INFO L226 Difference]: Without dead ends: 25681 [2021-06-12 19:28:01,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2021-06-12 19:28:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2021-06-12 19:28:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-06-12 19:28:01,698 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-06-12 19:28:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:01,698 INFO L482 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-06-12 19:28:01,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-06-12 19:28:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:01,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:01,725 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:01,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:01,926 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1859947835, now seen corresponding path program 451 times [2021-06-12 19:28:01,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:01,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660516707] [2021-06-12 19:28:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:02,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:02,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660516707] [2021-06-12 19:28:02,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660516707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:02,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255305718] [2021-06-12 19:28:02,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255305718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:02,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:02,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:28:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172035710] [2021-06-12 19:28:02,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:02,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:02,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:02,324 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:02,873 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2021-06-12 19:28:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:28:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:02,911 INFO L225 Difference]: With dead ends: 25528 [2021-06-12 19:28:02,911 INFO L226 Difference]: Without dead ends: 25521 [2021-06-12 19:28:02,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-06-12 19:28:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2021-06-12 19:28:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-06-12 19:28:03,309 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-06-12 19:28:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:03,309 INFO L482 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-06-12 19:28:03,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-06-12 19:28:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:03,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:03,336 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:03,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-12 19:28:03,537 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 519987609, now seen corresponding path program 452 times [2021-06-12 19:28:03,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:03,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570931554] [2021-06-12 19:28:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:03,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:03,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570931554] [2021-06-12 19:28:03,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570931554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:03,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219792440] [2021-06-12 19:28:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:03,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:04,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219792440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:04,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:04,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-12 19:28:04,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699148852] [2021-06-12 19:28:04,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:04,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:04,111 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:04,496 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2021-06-12 19:28:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:28:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:04,537 INFO L225 Difference]: With dead ends: 25433 [2021-06-12 19:28:04,537 INFO L226 Difference]: Without dead ends: 25420 [2021-06-12 19:28:04,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:28:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-06-12 19:28:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2021-06-12 19:28:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 25148 states have (on average 3.185819945920153) internal successors, (80117), 25148 states have internal predecessors, (80117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2021-06-12 19:28:04,946 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2021-06-12 19:28:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:04,946 INFO L482 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2021-06-12 19:28:04,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2021-06-12 19:28:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:04,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:04,973 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:05,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:05,173 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:05,174 INFO L82 PathProgramCache]: Analyzing trace with hash -799705089, now seen corresponding path program 453 times [2021-06-12 19:28:05,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:05,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215240640] [2021-06-12 19:28:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:05,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:05,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215240640] [2021-06-12 19:28:05,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215240640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:05,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659948262] [2021-06-12 19:28:05,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:05,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:28:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:05,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:05,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659948262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:05,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:05,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-12 19:28:05,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379639119] [2021-06-12 19:28:05,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:05,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:05,585 INFO L87 Difference]: Start difference. First operand 25149 states and 80117 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:06,094 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2021-06-12 19:28:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:28:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:06,134 INFO L225 Difference]: With dead ends: 26300 [2021-06-12 19:28:06,135 INFO L226 Difference]: Without dead ends: 26283 [2021-06-12 19:28:06,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2021-06-12 19:28:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2021-06-12 19:28:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.1899469661519264) internal successors, (81803), 25644 states have internal predecessors, (81803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2021-06-12 19:28:06,566 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2021-06-12 19:28:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:06,566 INFO L482 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2021-06-12 19:28:06,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2021-06-12 19:28:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:06,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:06,599 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:06,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:06,800 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 814997635, now seen corresponding path program 454 times [2021-06-12 19:28:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138491936] [2021-06-12 19:28:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:06,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:06,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138491936] [2021-06-12 19:28:06,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138491936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:06,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025950287] [2021-06-12 19:28:06,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:07,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:07,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:07,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025950287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:07,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:07,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-12 19:28:07,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770144442] [2021-06-12 19:28:07,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:07,203 INFO L87 Difference]: Start difference. First operand 25645 states and 81803 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:07,640 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2021-06-12 19:28:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:28:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:07,679 INFO L225 Difference]: With dead ends: 26302 [2021-06-12 19:28:07,680 INFO L226 Difference]: Without dead ends: 26284 [2021-06-12 19:28:07,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2021-06-12 19:28:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2021-06-12 19:28:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 25518 states have (on average 3.186966063171095) internal successors, (81325), 25518 states have internal predecessors, (81325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2021-06-12 19:28:08,102 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2021-06-12 19:28:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:08,102 INFO L482 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2021-06-12 19:28:08,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2021-06-12 19:28:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:08,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:08,136 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:08,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-12 19:28:08,336 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1264296193, now seen corresponding path program 455 times [2021-06-12 19:28:08,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:08,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854258670] [2021-06-12 19:28:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:08,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854258670] [2021-06-12 19:28:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854258670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71896799] [2021-06-12 19:28:08,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:08,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:28:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:08,806 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-12 19:28:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:08,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71896799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:08,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:08,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:28:08,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248362629] [2021-06-12 19:28:08,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:08,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:08,895 INFO L87 Difference]: Start difference. First operand 25519 states and 81325 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:09,371 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2021-06-12 19:28:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:28:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:09,411 INFO L225 Difference]: With dead ends: 26169 [2021-06-12 19:28:09,411 INFO L226 Difference]: Without dead ends: 26147 [2021-06-12 19:28:09,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2021-06-12 19:28:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2021-06-12 19:28:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 3.1853698759227265) internal successors, (81125), 25468 states have internal predecessors, (81125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2021-06-12 19:28:09,834 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2021-06-12 19:28:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:09,835 INFO L482 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2021-06-12 19:28:09,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2021-06-12 19:28:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:09,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:09,863 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:10,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable796,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:10,064 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:10,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1297895421, now seen corresponding path program 456 times [2021-06-12 19:28:10,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:10,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308977282] [2021-06-12 19:28:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:10,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:10,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308977282] [2021-06-12 19:28:10,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308977282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:10,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21106799] [2021-06-12 19:28:10,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:10,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:28:10,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:10,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:10,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21106799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:10,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:10,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:28:10,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262087018] [2021-06-12 19:28:10,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:10,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:10,486 INFO L87 Difference]: Start difference. First operand 25469 states and 81125 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:11,065 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2021-06-12 19:28:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:28:11,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:11,102 INFO L225 Difference]: With dead ends: 26109 [2021-06-12 19:28:11,103 INFO L226 Difference]: Without dead ends: 26083 [2021-06-12 19:28:11,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2021-06-12 19:28:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2021-06-12 19:28:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25423 states, 25422 states have (on average 3.1845645503894264) internal successors, (80958), 25422 states have internal predecessors, (80958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2021-06-12 19:28:11,691 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2021-06-12 19:28:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:11,691 INFO L482 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2021-06-12 19:28:11,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2021-06-12 19:28:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:11,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:11,718 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:11,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:11,918 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1955495807, now seen corresponding path program 457 times [2021-06-12 19:28:11,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:11,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154332098] [2021-06-12 19:28:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:12,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154332098] [2021-06-12 19:28:12,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154332098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822599603] [2021-06-12 19:28:12,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:12,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:12,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:12,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822599603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:12,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:12,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:28:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206426583] [2021-06-12 19:28:12,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:12,316 INFO L87 Difference]: Start difference. First operand 25423 states and 80958 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:12,949 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2021-06-12 19:28:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:28:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:12,987 INFO L225 Difference]: With dead ends: 25930 [2021-06-12 19:28:12,987 INFO L226 Difference]: Without dead ends: 25900 [2021-06-12 19:28:12,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:28:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-12 19:28:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2021-06-12 19:28:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-06-12 19:28:13,398 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-06-12 19:28:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:13,398 INFO L482 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-06-12 19:28:13,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-06-12 19:28:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:13,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:13,427 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:13,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-12 19:28:13,627 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash -268591229, now seen corresponding path program 458 times [2021-06-12 19:28:13,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:13,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133376467] [2021-06-12 19:28:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:13,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:13,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133376467] [2021-06-12 19:28:13,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133376467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:13,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137132034] [2021-06-12 19:28:13,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:13,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:13,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:13,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:14,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137132034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:14,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:14,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:28:14,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452984851] [2021-06-12 19:28:14,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:14,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:14,019 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:14,558 INFO L93 Difference]: Finished difference Result 25727 states and 81464 transitions. [2021-06-12 19:28:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:28:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:14,595 INFO L225 Difference]: With dead ends: 25727 [2021-06-12 19:28:14,596 INFO L226 Difference]: Without dead ends: 25720 [2021-06-12 19:28:14,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2021-06-12 19:28:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25388. [2021-06-12 19:28:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-06-12 19:28:15,080 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-06-12 19:28:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:15,080 INFO L482 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-06-12 19:28:15,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-06-12 19:28:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:15,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:15,108 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:15,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:15,310 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1989488811, now seen corresponding path program 459 times [2021-06-12 19:28:15,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:15,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435282977] [2021-06-12 19:28:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:15,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:15,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435282977] [2021-06-12 19:28:15,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435282977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:15,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231258411] [2021-06-12 19:28:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:15,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:28:15,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:15,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231258411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:15,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:15,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-12 19:28:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492228448] [2021-06-12 19:28:15,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:15,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:15,710 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:16,050 INFO L93 Difference]: Finished difference Result 25601 states and 81204 transitions. [2021-06-12 19:28:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:28:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:16,088 INFO L225 Difference]: With dead ends: 25601 [2021-06-12 19:28:16,088 INFO L226 Difference]: Without dead ends: 25588 [2021-06-12 19:28:16,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:28:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2021-06-12 19:28:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 25330. [2021-06-12 19:28:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25330 states, 25329 states have (on average 3.1820837774882547) internal successors, (80599), 25329 states have internal predecessors, (80599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25330 states to 25330 states and 80599 transitions. [2021-06-12 19:28:16,495 INFO L78 Accepts]: Start accepts. Automaton has 25330 states and 80599 transitions. Word has length 25 [2021-06-12 19:28:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:16,495 INFO L482 AbstractCegarLoop]: Abstraction has 25330 states and 80599 transitions. [2021-06-12 19:28:16,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25330 states and 80599 transitions. [2021-06-12 19:28:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:16,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:16,524 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:16,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:16,724 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2132685253, now seen corresponding path program 460 times [2021-06-12 19:28:16,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:16,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766452661] [2021-06-12 19:28:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:16,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:16,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766452661] [2021-06-12 19:28:16,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766452661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:16,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580606213] [2021-06-12 19:28:16,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:16,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:16,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:16,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:17,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580606213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:17,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:17,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-12 19:28:17,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291362352] [2021-06-12 19:28:17,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:17,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:17,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:17,110 INFO L87 Difference]: Start difference. First operand 25330 states and 80599 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:17,636 INFO L93 Difference]: Finished difference Result 26240 states and 82962 transitions. [2021-06-12 19:28:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:28:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:17,679 INFO L225 Difference]: With dead ends: 26240 [2021-06-12 19:28:17,679 INFO L226 Difference]: Without dead ends: 26223 [2021-06-12 19:28:17,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26223 states. [2021-06-12 19:28:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26223 to 25777. [2021-06-12 19:28:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 25776 states have (on average 3.1840083798882683) internal successors, (82071), 25776 states have internal predecessors, (82071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 82071 transitions. [2021-06-12 19:28:18,191 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 82071 transitions. Word has length 25 [2021-06-12 19:28:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:18,192 INFO L482 AbstractCegarLoop]: Abstraction has 25777 states and 82071 transitions. [2021-06-12 19:28:18,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 82071 transitions. [2021-06-12 19:28:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:18,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:18,225 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:18,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-12 19:28:18,426 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:18,426 INFO L82 PathProgramCache]: Analyzing trace with hash -517982529, now seen corresponding path program 461 times [2021-06-12 19:28:18,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:18,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150001779] [2021-06-12 19:28:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:18,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:18,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150001779] [2021-06-12 19:28:18,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150001779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:18,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182348014] [2021-06-12 19:28:18,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:18,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:28:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:18,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182348014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-12 19:28:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507118753] [2021-06-12 19:28:18,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:18,814 INFO L87 Difference]: Start difference. First operand 25777 states and 82071 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:19,287 INFO L93 Difference]: Finished difference Result 26238 states and 82828 transitions. [2021-06-12 19:28:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:28:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:19,328 INFO L225 Difference]: With dead ends: 26238 [2021-06-12 19:28:19,328 INFO L226 Difference]: Without dead ends: 26220 [2021-06-12 19:28:19,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-12 19:28:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25645. [2021-06-12 19:28:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.181913897987833) internal successors, (81597), 25644 states have internal predecessors, (81597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81597 transitions. [2021-06-12 19:28:19,763 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81597 transitions. Word has length 25 [2021-06-12 19:28:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:19,763 INFO L482 AbstractCegarLoop]: Abstraction has 25645 states and 81597 transitions. [2021-06-12 19:28:19,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81597 transitions. [2021-06-12 19:28:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:19,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:19,796 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:19,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:19,996 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1697690939, now seen corresponding path program 462 times [2021-06-12 19:28:19,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:19,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984894652] [2021-06-12 19:28:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:20,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:20,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984894652] [2021-06-12 19:28:20,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984894652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:20,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657090326] [2021-06-12 19:28:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:20,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:28:20,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:20,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657090326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:20,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:20,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:28:20,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565232084] [2021-06-12 19:28:20,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:20,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:20,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:20,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:20,476 INFO L87 Difference]: Start difference. First operand 25645 states and 81597 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:20,990 INFO L93 Difference]: Finished difference Result 26128 states and 82385 transitions. [2021-06-12 19:28:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:28:20,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:21,030 INFO L225 Difference]: With dead ends: 26128 [2021-06-12 19:28:21,030 INFO L226 Difference]: Without dead ends: 26106 [2021-06-12 19:28:21,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2021-06-12 19:28:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25607. [2021-06-12 19:28:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25607 states, 25606 states have (on average 3.180465515894712) internal successors, (81439), 25606 states have internal predecessors, (81439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25607 states to 25607 states and 81439 transitions. [2021-06-12 19:28:21,519 INFO L78 Accepts]: Start accepts. Automaton has 25607 states and 81439 transitions. Word has length 25 [2021-06-12 19:28:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:21,519 INFO L482 AbstractCegarLoop]: Abstraction has 25607 states and 81439 transitions. [2021-06-12 19:28:21,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 25607 states and 81439 transitions. [2021-06-12 19:28:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:21,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:21,552 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:21,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:21,752 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1664091711, now seen corresponding path program 463 times [2021-06-12 19:28:21,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:21,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080672375] [2021-06-12 19:28:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:21,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080672375] [2021-06-12 19:28:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080672375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:21,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134406464] [2021-06-12 19:28:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:21,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:21,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:22,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134406464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:22,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:22,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:28:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856546339] [2021-06-12 19:28:22,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:22,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:22,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:22,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:22,134 INFO L87 Difference]: Start difference. First operand 25607 states and 81439 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:22,701 INFO L93 Difference]: Finished difference Result 26123 states and 82279 transitions. [2021-06-12 19:28:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:28:22,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:22,739 INFO L225 Difference]: With dead ends: 26123 [2021-06-12 19:28:22,739 INFO L226 Difference]: Without dead ends: 26097 [2021-06-12 19:28:22,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26097 states. [2021-06-12 19:28:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26097 to 25568. [2021-06-12 19:28:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 25567 states have (on average 3.179645636953886) internal successors, (81294), 25567 states have internal predecessors, (81294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 81294 transitions. [2021-06-12 19:28:23,161 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 81294 transitions. Word has length 25 [2021-06-12 19:28:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:23,161 INFO L482 AbstractCegarLoop]: Abstraction has 25568 states and 81294 transitions. [2021-06-12 19:28:23,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 81294 transitions. [2021-06-12 19:28:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:23,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:23,193 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:23,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:23,393 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash 622515643, now seen corresponding path program 464 times [2021-06-12 19:28:23,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:23,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939098823] [2021-06-12 19:28:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:23,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939098823] [2021-06-12 19:28:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939098823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238569842] [2021-06-12 19:28:23,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:23,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:23,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238569842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:23,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:23,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:28:23,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320850934] [2021-06-12 19:28:23,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:23,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:23,760 INFO L87 Difference]: Start difference. First operand 25568 states and 81294 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:24,509 INFO L93 Difference]: Finished difference Result 26123 states and 82191 transitions. [2021-06-12 19:28:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:24,547 INFO L225 Difference]: With dead ends: 26123 [2021-06-12 19:28:24,547 INFO L226 Difference]: Without dead ends: 26093 [2021-06-12 19:28:24,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:28:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26093 states. [2021-06-12 19:28:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26093 to 25530. [2021-06-12 19:28:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25530 states, 25529 states have (on average 3.179286301852795) internal successors, (81164), 25529 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 81164 transitions. [2021-06-12 19:28:24,954 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 81164 transitions. Word has length 25 [2021-06-12 19:28:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:24,954 INFO L482 AbstractCegarLoop]: Abstraction has 25530 states and 81164 transitions. [2021-06-12 19:28:24,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 81164 transitions. [2021-06-12 19:28:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:24,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:24,981 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:25,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:25,182 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1601571393, now seen corresponding path program 465 times [2021-06-12 19:28:25,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:25,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884174105] [2021-06-12 19:28:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:25,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:25,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884174105] [2021-06-12 19:28:25,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884174105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:25,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250466795] [2021-06-12 19:28:25,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:25,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:28:25,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:25,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250466795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:25,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:25,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:28:25,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73556416] [2021-06-12 19:28:25,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:25,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:25,565 INFO L87 Difference]: Start difference. First operand 25530 states and 81164 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:26,208 INFO L93 Difference]: Finished difference Result 25971 states and 81876 transitions. [2021-06-12 19:28:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:28:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:26,246 INFO L225 Difference]: With dead ends: 25971 [2021-06-12 19:28:26,246 INFO L226 Difference]: Without dead ends: 25937 [2021-06-12 19:28:26,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:28:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2021-06-12 19:28:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 25500. [2021-06-12 19:28:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 3.179379583513079) internal successors, (81071), 25499 states have internal predecessors, (81071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 81071 transitions. [2021-06-12 19:28:26,670 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 81071 transitions. Word has length 25 [2021-06-12 19:28:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:26,670 INFO L482 AbstractCegarLoop]: Abstraction has 25500 states and 81071 transitions. [2021-06-12 19:28:26,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 81071 transitions. [2021-06-12 19:28:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:26,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:26,697 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:26,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:26,898 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1828792773, now seen corresponding path program 466 times [2021-06-12 19:28:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:26,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867197209] [2021-06-12 19:28:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:27,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867197209] [2021-06-12 19:28:27,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867197209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232074476] [2021-06-12 19:28:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:27,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:27,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:27,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232074476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:27,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:27,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:28:27,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425421350] [2021-06-12 19:28:27,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:27,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:27,271 INFO L87 Difference]: Start difference. First operand 25500 states and 81071 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:27,976 INFO L93 Difference]: Finished difference Result 25807 states and 81556 transitions. [2021-06-12 19:28:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:28,014 INFO L225 Difference]: With dead ends: 25807 [2021-06-12 19:28:28,014 INFO L226 Difference]: Without dead ends: 25800 [2021-06-12 19:28:28,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:28:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25800 states. [2021-06-12 19:28:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25800 to 25502. [2021-06-12 19:28:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 3.1792478726324456) internal successors, (81074), 25501 states have internal predecessors, (81074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 81074 transitions. [2021-06-12 19:28:28,450 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 81074 transitions. Word has length 25 [2021-06-12 19:28:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:28,451 INFO L482 AbstractCegarLoop]: Abstraction has 25502 states and 81074 transitions. [2021-06-12 19:28:28,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 81074 transitions. [2021-06-12 19:28:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:28,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:28,480 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:28,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:28,681 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:28,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1821120793, now seen corresponding path program 467 times [2021-06-12 19:28:28,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:28,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143473875] [2021-06-12 19:28:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:28,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:28,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143473875] [2021-06-12 19:28:28,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143473875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:28,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042951483] [2021-06-12 19:28:28,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:28,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:28:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:29,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042951483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:29,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:29,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-12 19:28:29,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273064633] [2021-06-12 19:28:29,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:29,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:29,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:29,102 INFO L87 Difference]: Start difference. First operand 25502 states and 81074 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:29,465 INFO L93 Difference]: Finished difference Result 25654 states and 81322 transitions. [2021-06-12 19:28:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:28:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:29,504 INFO L225 Difference]: With dead ends: 25654 [2021-06-12 19:28:29,504 INFO L226 Difference]: Without dead ends: 25641 [2021-06-12 19:28:29,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:28:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25641 states. [2021-06-12 19:28:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25641 to 25457. [2021-06-12 19:28:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 3.179525455688246) internal successors, (80938), 25456 states have internal predecessors, (80938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 80938 transitions. [2021-06-12 19:28:29,919 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 80938 transitions. Word has length 25 [2021-06-12 19:28:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:29,919 INFO L482 AbstractCegarLoop]: Abstraction has 25457 states and 80938 transitions. [2021-06-12 19:28:29,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 80938 transitions. [2021-06-12 19:28:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:29,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:29,947 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:30,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-06-12 19:28:30,147 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash -505397377, now seen corresponding path program 468 times [2021-06-12 19:28:30,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:30,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316750517] [2021-06-12 19:28:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:30,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316750517] [2021-06-12 19:28:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316750517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186874496] [2021-06-12 19:28:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:30,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:28:30,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186874496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-12 19:28:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127990399] [2021-06-12 19:28:30,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:30,681 INFO L87 Difference]: Start difference. First operand 25457 states and 80938 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:31,188 INFO L93 Difference]: Finished difference Result 26445 states and 83499 transitions. [2021-06-12 19:28:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:28:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:31,227 INFO L225 Difference]: With dead ends: 26445 [2021-06-12 19:28:31,227 INFO L226 Difference]: Without dead ends: 26428 [2021-06-12 19:28:31,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-06-12 19:28:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26047. [2021-06-12 19:28:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.1769177608845887) internal successors, (82746), 26046 states have internal predecessors, (82746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 82746 transitions. [2021-06-12 19:28:31,661 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 82746 transitions. Word has length 25 [2021-06-12 19:28:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:31,661 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 82746 transitions. [2021-06-12 19:28:31,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 82746 transitions. [2021-06-12 19:28:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:31,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:31,693 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:31,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:31,893 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1109305347, now seen corresponding path program 469 times [2021-06-12 19:28:31,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:31,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129199266] [2021-06-12 19:28:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:32,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:32,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129199266] [2021-06-12 19:28:32,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129199266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:32,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396068710] [2021-06-12 19:28:32,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:32,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396068710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:32,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:32,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-12 19:28:32,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758061607] [2021-06-12 19:28:32,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:32,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:32,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:32,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:32,288 INFO L87 Difference]: Start difference. First operand 26047 states and 82746 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:32,785 INFO L93 Difference]: Finished difference Result 26443 states and 83380 transitions. [2021-06-12 19:28:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:28:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:32,824 INFO L225 Difference]: With dead ends: 26443 [2021-06-12 19:28:32,825 INFO L226 Difference]: Without dead ends: 26427 [2021-06-12 19:28:32,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2021-06-12 19:28:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 26006. [2021-06-12 19:28:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26006 states, 26005 states have (on average 3.173658911747741) internal successors, (82531), 26005 states have internal predecessors, (82531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 82531 transitions. [2021-06-12 19:28:33,420 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 82531 transitions. Word has length 25 [2021-06-12 19:28:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:33,424 INFO L482 AbstractCegarLoop]: Abstraction has 26006 states and 82531 transitions. [2021-06-12 19:28:33,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 82531 transitions. [2021-06-12 19:28:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:33,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:33,458 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:33,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:33,659 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -969988481, now seen corresponding path program 470 times [2021-06-12 19:28:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:33,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999419552] [2021-06-12 19:28:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:33,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:33,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999419552] [2021-06-12 19:28:33,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999419552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:33,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425152594] [2021-06-12 19:28:33,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:33,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:33,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:34,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425152594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:34,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:34,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:28:34,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758445491] [2021-06-12 19:28:34,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:34,035 INFO L87 Difference]: Start difference. First operand 26006 states and 82531 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:34,593 INFO L93 Difference]: Finished difference Result 26428 states and 83208 transitions. [2021-06-12 19:28:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:28:34,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:34,632 INFO L225 Difference]: With dead ends: 26428 [2021-06-12 19:28:34,632 INFO L226 Difference]: Without dead ends: 26410 [2021-06-12 19:28:34,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2021-06-12 19:28:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 25949. [2021-06-12 19:28:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25949 states, 25948 states have (on average 3.1697240635116386) internal successors, (82248), 25948 states have internal predecessors, (82248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25949 states to 25949 states and 82248 transitions. [2021-06-12 19:28:35,053 INFO L78 Accepts]: Start accepts. Automaton has 25949 states and 82248 transitions. Word has length 25 [2021-06-12 19:28:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:35,053 INFO L482 AbstractCegarLoop]: Abstraction has 25949 states and 82248 transitions. [2021-06-12 19:28:35,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25949 states and 82248 transitions. [2021-06-12 19:28:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:35,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:35,086 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:35,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-12 19:28:35,286 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1003587709, now seen corresponding path program 471 times [2021-06-12 19:28:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:35,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137456120] [2021-06-12 19:28:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:35,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:35,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137456120] [2021-06-12 19:28:35,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137456120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:35,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209529646] [2021-06-12 19:28:35,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:35,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:28:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:35,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:35,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209529646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:35,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:35,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:28:35,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727585263] [2021-06-12 19:28:35,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:35,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:35,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:35,676 INFO L87 Difference]: Start difference. First operand 25949 states and 82248 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:36,366 INFO L93 Difference]: Finished difference Result 26398 states and 82966 transitions. [2021-06-12 19:28:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:36,409 INFO L225 Difference]: With dead ends: 26398 [2021-06-12 19:28:36,409 INFO L226 Difference]: Without dead ends: 26378 [2021-06-12 19:28:36,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2021-06-12 19:28:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 25877. [2021-06-12 19:28:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25877 states, 25876 states have (on average 3.166409027670428) internal successors, (81934), 25876 states have internal predecessors, (81934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25877 states to 25877 states and 81934 transitions. [2021-06-12 19:28:36,871 INFO L78 Accepts]: Start accepts. Automaton has 25877 states and 81934 transitions. Word has length 25 [2021-06-12 19:28:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:36,871 INFO L482 AbstractCegarLoop]: Abstraction has 25877 states and 81934 transitions. [2021-06-12 19:28:36,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25877 states and 81934 transitions. [2021-06-12 19:28:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:36,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:36,904 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:37,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:37,104 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2045163777, now seen corresponding path program 472 times [2021-06-12 19:28:37,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:37,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766283683] [2021-06-12 19:28:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:37,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766283683] [2021-06-12 19:28:37,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766283683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:37,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796560539] [2021-06-12 19:28:37,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:37,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:37,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796560539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:37,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:37,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:28:37,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880494141] [2021-06-12 19:28:37,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:37,491 INFO L87 Difference]: Start difference. First operand 25877 states and 81934 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:38,095 INFO L93 Difference]: Finished difference Result 26361 states and 82705 transitions. [2021-06-12 19:28:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:28:38,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:38,137 INFO L225 Difference]: With dead ends: 26361 [2021-06-12 19:28:38,137 INFO L226 Difference]: Without dead ends: 26339 [2021-06-12 19:28:38,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:28:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2021-06-12 19:28:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 25791. [2021-06-12 19:28:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25791 states, 25790 states have (on average 3.164831329972858) internal successors, (81621), 25790 states have internal predecessors, (81621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 81621 transitions. [2021-06-12 19:28:38,574 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 81621 transitions. Word has length 25 [2021-06-12 19:28:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:38,574 INFO L482 AbstractCegarLoop]: Abstraction has 25791 states and 81621 transitions. [2021-06-12 19:28:38,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 81621 transitions. [2021-06-12 19:28:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:38,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:38,607 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:38,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:38,808 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash 25716483, now seen corresponding path program 473 times [2021-06-12 19:28:38,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:38,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571268916] [2021-06-12 19:28:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:39,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:39,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571268916] [2021-06-12 19:28:39,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571268916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:39,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498058401] [2021-06-12 19:28:39,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:39,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:28:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:39,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:39,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498058401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:39,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:39,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:28:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592052340] [2021-06-12 19:28:39,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:39,206 INFO L87 Difference]: Start difference. First operand 25791 states and 81621 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:39,902 INFO L93 Difference]: Finished difference Result 26316 states and 82452 transitions. [2021-06-12 19:28:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:28:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:39,943 INFO L225 Difference]: With dead ends: 26316 [2021-06-12 19:28:39,943 INFO L226 Difference]: Without dead ends: 26292 [2021-06-12 19:28:39,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:28:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26292 states. [2021-06-12 19:28:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26292 to 25713. [2021-06-12 19:28:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25713 states, 25712 states have (on average 3.164281269446173) internal successors, (81360), 25712 states have internal predecessors, (81360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25713 states to 25713 states and 81360 transitions. [2021-06-12 19:28:40,380 INFO L78 Accepts]: Start accepts. Automaton has 25713 states and 81360 transitions. Word has length 25 [2021-06-12 19:28:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:40,380 INFO L482 AbstractCegarLoop]: Abstraction has 25713 states and 81360 transitions. [2021-06-12 19:28:40,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 25713 states and 81360 transitions. [2021-06-12 19:28:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:40,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:40,414 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:40,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-12 19:28:40,614 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:40,614 INFO L82 PathProgramCache]: Analyzing trace with hash -201504897, now seen corresponding path program 474 times [2021-06-12 19:28:40,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:40,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216630798] [2021-06-12 19:28:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:40,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:40,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216630798] [2021-06-12 19:28:40,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216630798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:40,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170683644] [2021-06-12 19:28:40,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:40,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:28:40,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:41,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170683644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:41,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:41,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:28:41,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036143563] [2021-06-12 19:28:41,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:41,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:41,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:41,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:41,056 INFO L87 Difference]: Start difference. First operand 25713 states and 81360 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:41,730 INFO L93 Difference]: Finished difference Result 26083 states and 81944 transitions. [2021-06-12 19:28:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:28:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:41,769 INFO L225 Difference]: With dead ends: 26083 [2021-06-12 19:28:41,769 INFO L226 Difference]: Without dead ends: 26057 [2021-06-12 19:28:41,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:28:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-06-12 19:28:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25637. [2021-06-12 19:28:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 3.1651973786862224) internal successors, (81143), 25636 states have internal predecessors, (81143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 81143 transitions. [2021-06-12 19:28:42,196 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 81143 transitions. Word has length 25 [2021-06-12 19:28:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:42,196 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 81143 transitions. [2021-06-12 19:28:42,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 81143 transitions. [2021-06-12 19:28:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:42,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:42,228 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:42,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-12 19:28:42,429 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1344566915, now seen corresponding path program 475 times [2021-06-12 19:28:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051387651] [2021-06-12 19:28:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:42,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:42,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051387651] [2021-06-12 19:28:42,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051387651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:42,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386324591] [2021-06-12 19:28:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:42,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386324591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:42,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:42,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:28:42,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189877210] [2021-06-12 19:28:42,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:42,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:42,855 INFO L87 Difference]: Start difference. First operand 25637 states and 81143 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:43,612 INFO L93 Difference]: Finished difference Result 25903 states and 81553 transitions. [2021-06-12 19:28:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:28:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:43,650 INFO L225 Difference]: With dead ends: 25903 [2021-06-12 19:28:43,650 INFO L226 Difference]: Without dead ends: 25896 [2021-06-12 19:28:43,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:28:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25896 states. [2021-06-12 19:28:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25896 to 25651. [2021-06-12 19:28:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 3.164288499025341) internal successors, (81164), 25650 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 81164 transitions. [2021-06-12 19:28:44,055 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 81164 transitions. Word has length 25 [2021-06-12 19:28:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:44,055 INFO L482 AbstractCegarLoop]: Abstraction has 25651 states and 81164 transitions. [2021-06-12 19:28:44,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 81164 transitions. [2021-06-12 19:28:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:44,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:44,088 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:44,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:44,288 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash -880520577, now seen corresponding path program 476 times [2021-06-12 19:28:44,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:44,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663056001] [2021-06-12 19:28:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:44,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:44,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663056001] [2021-06-12 19:28:44,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663056001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:44,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741449100] [2021-06-12 19:28:44,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:44,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:44,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741449100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:44,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:44,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-12 19:28:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478371623] [2021-06-12 19:28:44,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:44,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:44,717 INFO L87 Difference]: Start difference. First operand 25651 states and 81164 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:45,067 INFO L93 Difference]: Finished difference Result 26339 states and 82876 transitions. [2021-06-12 19:28:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:28:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:45,106 INFO L225 Difference]: With dead ends: 26339 [2021-06-12 19:28:45,106 INFO L226 Difference]: Without dead ends: 26329 [2021-06-12 19:28:45,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26329 states. [2021-06-12 19:28:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26329 to 25789. [2021-06-12 19:28:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25789 states, 25788 states have (on average 3.167248332557779) internal successors, (81677), 25788 states have internal predecessors, (81677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25789 states to 25789 states and 81677 transitions. [2021-06-12 19:28:45,532 INFO L78 Accepts]: Start accepts. Automaton has 25789 states and 81677 transitions. Word has length 25 [2021-06-12 19:28:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:45,532 INFO L482 AbstractCegarLoop]: Abstraction has 25789 states and 81677 transitions. [2021-06-12 19:28:45,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 25789 states and 81677 transitions. [2021-06-12 19:28:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:45,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:45,566 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:45,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-06-12 19:28:45,767 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 734182147, now seen corresponding path program 477 times [2021-06-12 19:28:45,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:45,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194938973] [2021-06-12 19:28:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:45,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:45,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194938973] [2021-06-12 19:28:45,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194938973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:45,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235476513] [2021-06-12 19:28:45,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:45,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:28:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:46,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235476513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:46,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:46,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-06-12 19:28:46,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667776441] [2021-06-12 19:28:46,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:46,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:46,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:46,239 INFO L87 Difference]: Start difference. First operand 25789 states and 81677 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:46,589 INFO L93 Difference]: Finished difference Result 26321 states and 82830 transitions. [2021-06-12 19:28:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:28:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:46,731 INFO L225 Difference]: With dead ends: 26321 [2021-06-12 19:28:46,731 INFO L226 Difference]: Without dead ends: 26314 [2021-06-12 19:28:46,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:28:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26314 states. [2021-06-12 19:28:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26314 to 25787. [2021-06-12 19:28:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25787 states, 25786 states have (on average 3.1671837431164196) internal successors, (81669), 25786 states have internal predecessors, (81669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25787 states to 25787 states and 81669 transitions. [2021-06-12 19:28:47,106 INFO L78 Accepts]: Start accepts. Automaton has 25787 states and 81669 transitions. Word has length 25 [2021-06-12 19:28:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:47,106 INFO L482 AbstractCegarLoop]: Abstraction has 25787 states and 81669 transitions. [2021-06-12 19:28:47,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25787 states and 81669 transitions. [2021-06-12 19:28:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:47,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:47,139 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:47,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-12 19:28:47,340 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash -309065771, now seen corresponding path program 478 times [2021-06-12 19:28:47,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:47,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002564658] [2021-06-12 19:28:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:47,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002564658] [2021-06-12 19:28:47,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002564658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487552581] [2021-06-12 19:28:47,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:47,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:47,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:47,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:47,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487552581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:47,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:47,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-06-12 19:28:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913317164] [2021-06-12 19:28:47,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:47,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:47,792 INFO L87 Difference]: Start difference. First operand 25787 states and 81669 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:48,171 INFO L93 Difference]: Finished difference Result 26101 states and 82243 transitions. [2021-06-12 19:28:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:28:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:48,211 INFO L225 Difference]: With dead ends: 26101 [2021-06-12 19:28:48,212 INFO L226 Difference]: Without dead ends: 26094 [2021-06-12 19:28:48,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:28:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2021-06-12 19:28:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25786. [2021-06-12 19:28:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25786 states, 25785 states have (on average 3.1671902268760905) internal successors, (81666), 25785 states have internal predecessors, (81666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25786 states to 25786 states and 81666 transitions. [2021-06-12 19:28:48,646 INFO L78 Accepts]: Start accepts. Automaton has 25786 states and 81666 transitions. Word has length 25 [2021-06-12 19:28:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:48,646 INFO L482 AbstractCegarLoop]: Abstraction has 25786 states and 81666 transitions. [2021-06-12 19:28:48,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25786 states and 81666 transitions. [2021-06-12 19:28:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:48,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:48,679 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:48,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-06-12 19:28:48,879 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 375562111, now seen corresponding path program 479 times [2021-06-12 19:28:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:48,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394053301] [2021-06-12 19:28:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:49,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394053301] [2021-06-12 19:28:49,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394053301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:49,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038794289] [2021-06-12 19:28:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:49,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:28:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:49,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038794289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:49,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:49,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-12 19:28:49,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018522615] [2021-06-12 19:28:49,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:49,298 INFO L87 Difference]: Start difference. First operand 25786 states and 81666 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:49,689 INFO L93 Difference]: Finished difference Result 26623 states and 83970 transitions. [2021-06-12 19:28:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:49,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:49,730 INFO L225 Difference]: With dead ends: 26623 [2021-06-12 19:28:49,730 INFO L226 Difference]: Without dead ends: 26613 [2021-06-12 19:28:49,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2021-06-12 19:28:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26000. [2021-06-12 19:28:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.1711219662294705) internal successors, (82446), 25999 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 82446 transitions. [2021-06-12 19:28:50,231 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 82446 transitions. Word has length 25 [2021-06-12 19:28:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:50,232 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 82446 transitions. [2021-06-12 19:28:50,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 82446 transitions. [2021-06-12 19:28:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:50,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:50,264 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:50,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:50,465 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1990264835, now seen corresponding path program 480 times [2021-06-12 19:28:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:50,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339637022] [2021-06-12 19:28:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:50,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:50,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339637022] [2021-06-12 19:28:50,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339637022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:50,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889132131] [2021-06-12 19:28:50,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:50,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:28:50,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:50,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889132131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:50,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:50,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-06-12 19:28:50,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117329291] [2021-06-12 19:28:50,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:50,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:50,904 INFO L87 Difference]: Start difference. First operand 26000 states and 82446 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:51,298 INFO L93 Difference]: Finished difference Result 26604 states and 83911 transitions. [2021-06-12 19:28:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:51,340 INFO L225 Difference]: With dead ends: 26604 [2021-06-12 19:28:51,340 INFO L226 Difference]: Without dead ends: 26597 [2021-06-12 19:28:51,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26597 states. [2021-06-12 19:28:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26597 to 25997. [2021-06-12 19:28:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25997 states, 25996 states have (on average 3.1710263117402677) internal successors, (82434), 25996 states have internal predecessors, (82434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25997 states to 25997 states and 82434 transitions. [2021-06-12 19:28:51,776 INFO L78 Accepts]: Start accepts. Automaton has 25997 states and 82434 transitions. Word has length 25 [2021-06-12 19:28:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:51,776 INFO L482 AbstractCegarLoop]: Abstraction has 25997 states and 82434 transitions. [2021-06-12 19:28:51,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 25997 states and 82434 transitions. [2021-06-12 19:28:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:51,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:51,811 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:52,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-12 19:28:52,012 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash 947016917, now seen corresponding path program 481 times [2021-06-12 19:28:52,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:52,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979234005] [2021-06-12 19:28:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:52,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:52,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979234005] [2021-06-12 19:28:52,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979234005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:52,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262079280] [2021-06-12 19:28:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:52,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:52,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:52,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262079280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:52,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:52,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:28:52,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801874659] [2021-06-12 19:28:52,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:52,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:52,428 INFO L87 Difference]: Start difference. First operand 25997 states and 82434 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:52,869 INFO L93 Difference]: Finished difference Result 26449 states and 83488 transitions. [2021-06-12 19:28:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:52,909 INFO L225 Difference]: With dead ends: 26449 [2021-06-12 19:28:52,909 INFO L226 Difference]: Without dead ends: 26436 [2021-06-12 19:28:52,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2021-06-12 19:28:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 26004. [2021-06-12 19:28:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26004 states, 26003 states have (on average 3.1706341575972004) internal successors, (82446), 26003 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26004 states to 26004 states and 82446 transitions. [2021-06-12 19:28:53,434 INFO L78 Accepts]: Start accepts. Automaton has 26004 states and 82446 transitions. Word has length 25 [2021-06-12 19:28:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:53,434 INFO L482 AbstractCegarLoop]: Abstraction has 26004 states and 82446 transitions. [2021-06-12 19:28:53,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26004 states and 82446 transitions. [2021-06-12 19:28:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:53,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:53,468 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:53,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:53,668 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1482246719, now seen corresponding path program 482 times [2021-06-12 19:28:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:53,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915899956] [2021-06-12 19:28:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:53,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915899956] [2021-06-12 19:28:53,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915899956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151093428] [2021-06-12 19:28:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:53,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:53,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:53,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:54,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151093428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:54,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:54,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:28:54,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882262577] [2021-06-12 19:28:54,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:54,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:54,101 INFO L87 Difference]: Start difference. First operand 26004 states and 82446 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:54,524 INFO L93 Difference]: Finished difference Result 26271 states and 82944 transitions. [2021-06-12 19:28:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:54,563 INFO L225 Difference]: With dead ends: 26271 [2021-06-12 19:28:54,563 INFO L226 Difference]: Without dead ends: 26264 [2021-06-12 19:28:54,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26264 states. [2021-06-12 19:28:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26264 to 26002. [2021-06-12 19:28:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26002 states, 26001 states have (on average 3.1706472827968155) internal successors, (82440), 26001 states have internal predecessors, (82440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26002 states to 26002 states and 82440 transitions. [2021-06-12 19:28:54,996 INFO L78 Accepts]: Start accepts. Automaton has 26002 states and 82440 transitions. Word has length 25 [2021-06-12 19:28:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:54,996 INFO L482 AbstractCegarLoop]: Abstraction has 26002 states and 82440 transitions. [2021-06-12 19:28:54,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 26002 states and 82440 transitions. [2021-06-12 19:28:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:55,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:55,030 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:55,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-12 19:28:55,231 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash 880306103, now seen corresponding path program 483 times [2021-06-12 19:28:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093872161] [2021-06-12 19:28:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:55,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:55,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093872161] [2021-06-12 19:28:55,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093872161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:55,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973458675] [2021-06-12 19:28:55,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:55,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:28:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973458675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:55,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:55,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:28:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784244528] [2021-06-12 19:28:55,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:28:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:28:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:28:55,672 INFO L87 Difference]: Start difference. First operand 26002 states and 82440 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:56,081 INFO L93 Difference]: Finished difference Result 26167 states and 82719 transitions. [2021-06-12 19:28:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:28:56,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:56,122 INFO L225 Difference]: With dead ends: 26167 [2021-06-12 19:28:56,122 INFO L226 Difference]: Without dead ends: 26151 [2021-06-12 19:28:56,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-06-12 19:28:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25962. [2021-06-12 19:28:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25962 states, 25961 states have (on average 3.170910211471053) internal successors, (82320), 25961 states have internal predecessors, (82320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25962 states to 25962 states and 82320 transitions. [2021-06-12 19:28:56,633 INFO L78 Accepts]: Start accepts. Automaton has 25962 states and 82320 transitions. Word has length 25 [2021-06-12 19:28:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:56,634 INFO L482 AbstractCegarLoop]: Abstraction has 25962 states and 82320 transitions. [2021-06-12 19:28:56,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 25962 states and 82320 transitions. [2021-06-12 19:28:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:56,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:56,665 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:56,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:56,866 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash 659419775, now seen corresponding path program 484 times [2021-06-12 19:28:56,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:56,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567230786] [2021-06-12 19:28:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:57,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:57,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567230786] [2021-06-12 19:28:57,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567230786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:57,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955353027] [2021-06-12 19:28:57,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:57,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:57,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:57,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955353027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:57,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:57,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-12 19:28:57,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761553137] [2021-06-12 19:28:57,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:57,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:57,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:57,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:57,286 INFO L87 Difference]: Start difference. First operand 25962 states and 82320 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:57,658 INFO L93 Difference]: Finished difference Result 26771 states and 84501 transitions. [2021-06-12 19:28:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:57,701 INFO L225 Difference]: With dead ends: 26771 [2021-06-12 19:28:57,701 INFO L226 Difference]: Without dead ends: 26761 [2021-06-12 19:28:57,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 387.1ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26761 states. [2021-06-12 19:28:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26761 to 26195. [2021-06-12 19:28:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26195 states, 26194 states have (on average 3.1746964953806214) internal successors, (83158), 26194 states have internal predecessors, (83158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 83158 transitions. [2021-06-12 19:28:58,147 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 83158 transitions. Word has length 25 [2021-06-12 19:28:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:58,147 INFO L482 AbstractCegarLoop]: Abstraction has 26195 states and 83158 transitions. [2021-06-12 19:28:58,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 83158 transitions. [2021-06-12 19:28:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:58,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:58,181 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:58,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-12 19:28:58,382 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2020844797, now seen corresponding path program 485 times [2021-06-12 19:28:58,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:58,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835890180] [2021-06-12 19:28:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:58,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:58,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835890180] [2021-06-12 19:28:58,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835890180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:58,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935512741] [2021-06-12 19:28:58,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:58,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:28:58,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:28:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:58,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935512741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:58,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:58,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-06-12 19:28:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062074640] [2021-06-12 19:28:58,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:28:58,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:28:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:28:58,808 INFO L87 Difference]: Start difference. First operand 26195 states and 83158 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:59,200 INFO L93 Difference]: Finished difference Result 26752 states and 84431 transitions. [2021-06-12 19:28:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:28:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:59,241 INFO L225 Difference]: With dead ends: 26752 [2021-06-12 19:28:59,241 INFO L226 Difference]: Without dead ends: 26745 [2021-06-12 19:28:59,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2021-06-12 19:28:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 26191. [2021-06-12 19:28:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26191 states, 26190 states have (on average 3.174570446735395) internal successors, (83142), 26190 states have internal predecessors, (83142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26191 states to 26191 states and 83142 transitions. [2021-06-12 19:28:59,794 INFO L78 Accepts]: Start accepts. Automaton has 26191 states and 83142 transitions. Word has length 25 [2021-06-12 19:28:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:59,794 INFO L482 AbstractCegarLoop]: Abstraction has 26191 states and 83142 transitions. [2021-06-12 19:28:59,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:28:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 26191 states and 83142 transitions. [2021-06-12 19:28:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:28:59,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:59,828 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:00,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:00,029 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1230874581, now seen corresponding path program 486 times [2021-06-12 19:29:00,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:00,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270008989] [2021-06-12 19:29:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:00,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:00,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270008989] [2021-06-12 19:29:00,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270008989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:00,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759633296] [2021-06-12 19:29:00,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:00,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:29:00,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:00,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:00,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759633296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:00,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:00,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:29:00,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061466579] [2021-06-12 19:29:00,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:00,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:00,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:00,431 INFO L87 Difference]: Start difference. First operand 26191 states and 83142 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:00,845 INFO L93 Difference]: Finished difference Result 26690 states and 84238 transitions. [2021-06-12 19:29:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:29:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:00,888 INFO L225 Difference]: With dead ends: 26690 [2021-06-12 19:29:00,888 INFO L226 Difference]: Without dead ends: 26677 [2021-06-12 19:29:00,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2021-06-12 19:29:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26188. [2021-06-12 19:29:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26188 states, 26187 states have (on average 3.1743613243212283) internal successors, (83127), 26187 states have internal predecessors, (83127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26188 states to 26188 states and 83127 transitions. [2021-06-12 19:29:01,332 INFO L78 Accepts]: Start accepts. Automaton has 26188 states and 83127 transitions. Word has length 25 [2021-06-12 19:29:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:01,332 INFO L482 AbstractCegarLoop]: Abstraction has 26188 states and 83127 transitions. [2021-06-12 19:29:01,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26188 states and 83127 transitions. [2021-06-12 19:29:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:01,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:01,367 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:01,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-12 19:29:01,567 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:01,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1766104383, now seen corresponding path program 487 times [2021-06-12 19:29:01,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:01,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928329324] [2021-06-12 19:29:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:01,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928329324] [2021-06-12 19:29:01,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928329324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983857763] [2021-06-12 19:29:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:01,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983857763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:01,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:01,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:29:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58435022] [2021-06-12 19:29:01,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:01,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:01,971 INFO L87 Difference]: Start difference. First operand 26188 states and 83127 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:02,430 INFO L93 Difference]: Finished difference Result 26573 states and 83882 transitions. [2021-06-12 19:29:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:02,472 INFO L225 Difference]: With dead ends: 26573 [2021-06-12 19:29:02,473 INFO L226 Difference]: Without dead ends: 26557 [2021-06-12 19:29:02,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26557 states. [2021-06-12 19:29:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26557 to 26197. [2021-06-12 19:29:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26197 states, 26196 states have (on average 3.1737288135593222) internal successors, (83139), 26196 states have internal predecessors, (83139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26197 states to 26197 states and 83139 transitions. [2021-06-12 19:29:03,057 INFO L78 Accepts]: Start accepts. Automaton has 26197 states and 83139 transitions. Word has length 25 [2021-06-12 19:29:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:03,057 INFO L482 AbstractCegarLoop]: Abstraction has 26197 states and 83139 transitions. [2021-06-12 19:29:03,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 26197 states and 83139 transitions. [2021-06-12 19:29:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:03,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:03,090 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:03,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable892,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:03,291 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:03,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1178359061, now seen corresponding path program 488 times [2021-06-12 19:29:03,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:03,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242043926] [2021-06-12 19:29:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:03,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:03,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242043926] [2021-06-12 19:29:03,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242043926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:03,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101764869] [2021-06-12 19:29:03,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:03,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:03,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101764869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:03,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:03,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:29:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336403051] [2021-06-12 19:29:03,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:03,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:03,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:03,682 INFO L87 Difference]: Start difference. First operand 26197 states and 83139 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:04,154 INFO L93 Difference]: Finished difference Result 26468 states and 83627 transitions. [2021-06-12 19:29:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:04,195 INFO L225 Difference]: With dead ends: 26468 [2021-06-12 19:29:04,195 INFO L226 Difference]: Without dead ends: 26461 [2021-06-12 19:29:04,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2021-06-12 19:29:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26194. [2021-06-12 19:29:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26194 states, 26193 states have (on average 3.1737487114878022) internal successors, (83130), 26193 states have internal predecessors, (83130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26194 states to 26194 states and 83130 transitions. [2021-06-12 19:29:04,620 INFO L78 Accepts]: Start accepts. Automaton has 26194 states and 83130 transitions. Word has length 25 [2021-06-12 19:29:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:04,620 INFO L482 AbstractCegarLoop]: Abstraction has 26194 states and 83130 transitions. [2021-06-12 19:29:04,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 26194 states and 83130 transitions. [2021-06-12 19:29:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:04,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:04,653 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:04,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-12 19:29:04,853 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash -599983809, now seen corresponding path program 489 times [2021-06-12 19:29:04,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:04,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229314601] [2021-06-12 19:29:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:05,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:05,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229314601] [2021-06-12 19:29:05,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229314601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090682619] [2021-06-12 19:29:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:05,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:29:05,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:05,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090682619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:05,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:05,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:29:05,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654573092] [2021-06-12 19:29:05,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:05,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:05,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:05,255 INFO L87 Difference]: Start difference. First operand 26194 states and 83130 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:05,646 INFO L93 Difference]: Finished difference Result 26478 states and 83625 transitions. [2021-06-12 19:29:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:29:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:05,685 INFO L225 Difference]: With dead ends: 26478 [2021-06-12 19:29:05,685 INFO L226 Difference]: Without dead ends: 26462 [2021-06-12 19:29:05,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2021-06-12 19:29:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 26156. [2021-06-12 19:29:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26156 states, 26155 states have (on average 3.172968839610017) internal successors, (82989), 26155 states have internal predecessors, (82989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26156 states to 26156 states and 82989 transitions. [2021-06-12 19:29:06,193 INFO L78 Accepts]: Start accepts. Automaton has 26156 states and 82989 transitions. Word has length 25 [2021-06-12 19:29:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:06,193 INFO L482 AbstractCegarLoop]: Abstraction has 26156 states and 82989 transitions. [2021-06-12 19:29:06,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26156 states and 82989 transitions. [2021-06-12 19:29:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:06,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:06,227 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:06,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:06,427 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash -301930851, now seen corresponding path program 490 times [2021-06-12 19:29:06,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:06,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800056165] [2021-06-12 19:29:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:06,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:06,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800056165] [2021-06-12 19:29:06,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800056165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:06,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706574894] [2021-06-12 19:29:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:06,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:06,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:06,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706574894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:06,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:06,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:29:06,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741302914] [2021-06-12 19:29:06,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:06,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:06,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:06,824 INFO L87 Difference]: Start difference. First operand 26156 states and 82989 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:07,252 INFO L93 Difference]: Finished difference Result 26350 states and 83325 transitions. [2021-06-12 19:29:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:29:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:07,294 INFO L225 Difference]: With dead ends: 26350 [2021-06-12 19:29:07,294 INFO L226 Difference]: Without dead ends: 26331 [2021-06-12 19:29:07,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2021-06-12 19:29:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 26122. [2021-06-12 19:29:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26122 states, 26121 states have (on average 3.173193981853681) internal successors, (82887), 26121 states have internal predecessors, (82887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 82887 transitions. [2021-06-12 19:29:07,725 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 82887 transitions. Word has length 25 [2021-06-12 19:29:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:07,725 INFO L482 AbstractCegarLoop]: Abstraction has 26122 states and 82887 transitions. [2021-06-12 19:29:07,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 82887 transitions. [2021-06-12 19:29:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:07,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:07,759 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:07,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:07,959 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash 869072767, now seen corresponding path program 491 times [2021-06-12 19:29:07,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:07,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629573984] [2021-06-12 19:29:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:08,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629573984] [2021-06-12 19:29:08,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629573984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099848813] [2021-06-12 19:29:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:08,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:29:08,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:08,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:08,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099848813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:08,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:08,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-12 19:29:08,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831541187] [2021-06-12 19:29:08,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:08,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:08,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:08,362 INFO L87 Difference]: Start difference. First operand 26122 states and 82887 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:08,765 INFO L93 Difference]: Finished difference Result 26878 states and 84798 transitions. [2021-06-12 19:29:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:29:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:08,809 INFO L225 Difference]: With dead ends: 26878 [2021-06-12 19:29:08,810 INFO L226 Difference]: Without dead ends: 26868 [2021-06-12 19:29:08,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2021-06-12 19:29:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26338. [2021-06-12 19:29:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26338 states, 26337 states have (on average 3.1761780005315714) internal successors, (83651), 26337 states have internal predecessors, (83651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26338 states to 26338 states and 83651 transitions. [2021-06-12 19:29:09,361 INFO L78 Accepts]: Start accepts. Automaton has 26338 states and 83651 transitions. Word has length 25 [2021-06-12 19:29:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:09,361 INFO L482 AbstractCegarLoop]: Abstraction has 26338 states and 83651 transitions. [2021-06-12 19:29:09,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26338 states and 83651 transitions. [2021-06-12 19:29:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:09,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:09,396 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:09,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:09,596 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:09,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:09,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1811191805, now seen corresponding path program 492 times [2021-06-12 19:29:09,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:09,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785948226] [2021-06-12 19:29:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:09,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:09,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785948226] [2021-06-12 19:29:09,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785948226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:09,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845223231] [2021-06-12 19:29:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:09,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:29:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:09,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845223231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:09,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:09,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-12 19:29:09,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158440459] [2021-06-12 19:29:09,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:09,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:09,999 INFO L87 Difference]: Start difference. First operand 26338 states and 83651 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:10,406 INFO L93 Difference]: Finished difference Result 26859 states and 84730 transitions. [2021-06-12 19:29:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:29:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:10,447 INFO L225 Difference]: With dead ends: 26859 [2021-06-12 19:29:10,448 INFO L226 Difference]: Without dead ends: 26852 [2021-06-12 19:29:10,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-06-12 19:29:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 26333. [2021-06-12 19:29:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26333 states, 26332 states have (on average 3.1760215707124413) internal successors, (83631), 26332 states have internal predecessors, (83631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26333 states to 26333 states and 83631 transitions. [2021-06-12 19:29:10,883 INFO L78 Accepts]: Start accepts. Automaton has 26333 states and 83631 transitions. Word has length 25 [2021-06-12 19:29:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:10,883 INFO L482 AbstractCegarLoop]: Abstraction has 26333 states and 83631 transitions. [2021-06-12 19:29:10,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26333 states and 83631 transitions. [2021-06-12 19:29:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:10,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:10,917 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:11,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:11,118 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1440527573, now seen corresponding path program 493 times [2021-06-12 19:29:11,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:11,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911096199] [2021-06-12 19:29:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:11,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911096199] [2021-06-12 19:29:11,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911096199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211304958] [2021-06-12 19:29:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211304958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:11,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:11,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:29:11,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787765464] [2021-06-12 19:29:11,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:11,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:11,501 INFO L87 Difference]: Start difference. First operand 26333 states and 83631 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:11,907 INFO L93 Difference]: Finished difference Result 26840 states and 84655 transitions. [2021-06-12 19:29:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:11,949 INFO L225 Difference]: With dead ends: 26840 [2021-06-12 19:29:11,949 INFO L226 Difference]: Without dead ends: 26827 [2021-06-12 19:29:11,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-12 19:29:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 26329. [2021-06-12 19:29:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26329 states, 26328 states have (on average 3.175820419325433) internal successors, (83613), 26328 states have internal predecessors, (83613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26329 states to 26329 states and 83613 transitions. [2021-06-12 19:29:12,515 INFO L78 Accepts]: Start accepts. Automaton has 26329 states and 83613 transitions. Word has length 25 [2021-06-12 19:29:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:12,515 INFO L482 AbstractCegarLoop]: Abstraction has 26329 states and 83613 transitions. [2021-06-12 19:29:12,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26329 states and 83613 transitions. [2021-06-12 19:29:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:12,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:12,549 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:12,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-12 19:29:12,749 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1975757375, now seen corresponding path program 494 times [2021-06-12 19:29:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:12,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040930350] [2021-06-12 19:29:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:12,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040930350] [2021-06-12 19:29:12,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040930350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:12,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258566720] [2021-06-12 19:29:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:12,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:12,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:12,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:13,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258566720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:13,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:13,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:29:13,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146261667] [2021-06-12 19:29:13,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:13,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:13,143 INFO L87 Difference]: Start difference. First operand 26329 states and 83613 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:13,635 INFO L93 Difference]: Finished difference Result 26818 states and 84533 transitions. [2021-06-12 19:29:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:29:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:13,675 INFO L225 Difference]: With dead ends: 26818 [2021-06-12 19:29:13,675 INFO L226 Difference]: Without dead ends: 26802 [2021-06-12 19:29:13,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26802 states. [2021-06-12 19:29:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26802 to 26325. [2021-06-12 19:29:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26325 states, 26324 states have (on average 3.175657194955174) internal successors, (83596), 26324 states have internal predecessors, (83596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26325 states to 26325 states and 83596 transitions. [2021-06-12 19:29:14,109 INFO L78 Accepts]: Start accepts. Automaton has 26325 states and 83596 transitions. Word has length 25 [2021-06-12 19:29:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:14,109 INFO L482 AbstractCegarLoop]: Abstraction has 26325 states and 83596 transitions. [2021-06-12 19:29:14,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26325 states and 83596 transitions. [2021-06-12 19:29:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:14,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:14,142 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:14,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:14,342 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1388012053, now seen corresponding path program 495 times [2021-06-12 19:29:14,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:14,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922474524] [2021-06-12 19:29:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:14,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:14,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922474524] [2021-06-12 19:29:14,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922474524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:14,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493557199] [2021-06-12 19:29:14,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:14,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:29:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493557199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:14,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:14,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:29:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548767248] [2021-06-12 19:29:14,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:14,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:14,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:14,727 INFO L87 Difference]: Start difference. First operand 26325 states and 83596 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:15,234 INFO L93 Difference]: Finished difference Result 26741 states and 84363 transitions. [2021-06-12 19:29:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:29:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:15,275 INFO L225 Difference]: With dead ends: 26741 [2021-06-12 19:29:15,275 INFO L226 Difference]: Without dead ends: 26722 [2021-06-12 19:29:15,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:29:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2021-06-12 19:29:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26330. [2021-06-12 19:29:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26330 states, 26329 states have (on average 3.1751300846974817) internal successors, (83598), 26329 states have internal predecessors, (83598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 83598 transitions. [2021-06-12 19:29:15,840 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 83598 transitions. Word has length 25 [2021-06-12 19:29:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:15,840 INFO L482 AbstractCegarLoop]: Abstraction has 26330 states and 83598 transitions. [2021-06-12 19:29:15,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 83598 transitions. [2021-06-12 19:29:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:15,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:15,878 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:16,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:16,079 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash 347776255, now seen corresponding path program 496 times [2021-06-12 19:29:16,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:16,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254678581] [2021-06-12 19:29:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:16,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:16,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254678581] [2021-06-12 19:29:16,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254678581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:16,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673513695] [2021-06-12 19:29:16,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:16,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:16,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:16,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:16,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673513695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:16,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:16,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:29:16,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236729378] [2021-06-12 19:29:16,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:16,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:16,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:16,481 INFO L87 Difference]: Start difference. First operand 26330 states and 83598 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:17,007 INFO L93 Difference]: Finished difference Result 26637 states and 84135 transitions. [2021-06-12 19:29:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:29:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:17,047 INFO L225 Difference]: With dead ends: 26637 [2021-06-12 19:29:17,047 INFO L226 Difference]: Without dead ends: 26630 [2021-06-12 19:29:17,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:29:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26630 states. [2021-06-12 19:29:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26630 to 26326. [2021-06-12 19:29:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26325 states have (on average 3.175156695156695) internal successors, (83586), 26325 states have internal predecessors, (83586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 83586 transitions. [2021-06-12 19:29:17,477 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 83586 transitions. Word has length 25 [2021-06-12 19:29:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:17,477 INFO L482 AbstractCegarLoop]: Abstraction has 26326 states and 83586 transitions. [2021-06-12 19:29:17,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 83586 transitions. [2021-06-12 19:29:17,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:17,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:17,510 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:17,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-12 19:29:17,711 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 755669175, now seen corresponding path program 497 times [2021-06-12 19:29:17,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:17,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289536082] [2021-06-12 19:29:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:17,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:17,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289536082] [2021-06-12 19:29:17,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289536082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:17,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043794983] [2021-06-12 19:29:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:17,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:29:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:17,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:18,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043794983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:18,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:18,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-06-12 19:29:18,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739611979] [2021-06-12 19:29:18,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:18,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:18,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:18,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:18,144 INFO L87 Difference]: Start difference. First operand 26326 states and 83586 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:18,555 INFO L93 Difference]: Finished difference Result 26655 states and 84164 transitions. [2021-06-12 19:29:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:29:18,556 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:18,599 INFO L225 Difference]: With dead ends: 26655 [2021-06-12 19:29:18,600 INFO L226 Difference]: Without dead ends: 26639 [2021-06-12 19:29:18,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26639 states. [2021-06-12 19:29:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26639 to 26300. [2021-06-12 19:29:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26300 states, 26299 states have (on average 3.1746073995208945) internal successors, (83489), 26299 states have internal predecessors, (83489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26300 states to 26300 states and 83489 transitions. [2021-06-12 19:29:19,178 INFO L78 Accepts]: Start accepts. Automaton has 26300 states and 83489 transitions. Word has length 25 [2021-06-12 19:29:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:19,178 INFO L482 AbstractCegarLoop]: Abstraction has 26300 states and 83489 transitions. [2021-06-12 19:29:19,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 26300 states and 83489 transitions. [2021-06-12 19:29:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:19,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:19,211 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:19,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:19,412 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1053722133, now seen corresponding path program 498 times [2021-06-12 19:29:19,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:19,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346904220] [2021-06-12 19:29:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:19,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346904220] [2021-06-12 19:29:19,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346904220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147481305] [2021-06-12 19:29:19,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:19,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:29:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:19,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:19,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147481305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:19,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:19,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-06-12 19:29:19,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684416483] [2021-06-12 19:29:19,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:19,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:19,819 INFO L87 Difference]: Start difference. First operand 26300 states and 83489 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:20,274 INFO L93 Difference]: Finished difference Result 26683 states and 84164 transitions. [2021-06-12 19:29:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:29:20,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:20,315 INFO L225 Difference]: With dead ends: 26683 [2021-06-12 19:29:20,315 INFO L226 Difference]: Without dead ends: 26664 [2021-06-12 19:29:20,316 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26664 states. [2021-06-12 19:29:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26664 to 26276. [2021-06-12 19:29:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26276 states, 26275 states have (on average 3.1743482397716463) internal successors, (83406), 26275 states have internal predecessors, (83406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26276 states to 26276 states and 83406 transitions. [2021-06-12 19:29:20,759 INFO L78 Accepts]: Start accepts. Automaton has 26276 states and 83406 transitions. Word has length 25 [2021-06-12 19:29:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:20,759 INFO L482 AbstractCegarLoop]: Abstraction has 26276 states and 83406 transitions. [2021-06-12 19:29:20,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 26276 states and 83406 transitions. [2021-06-12 19:29:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:20,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:20,793 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:20,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-06-12 19:29:20,994 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1703429239, now seen corresponding path program 499 times [2021-06-12 19:29:20,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:20,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664031036] [2021-06-12 19:29:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:21,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:21,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664031036] [2021-06-12 19:29:21,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664031036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:21,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956079554] [2021-06-12 19:29:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:21,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956079554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:21,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:21,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-06-12 19:29:21,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958452672] [2021-06-12 19:29:21,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:21,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:21,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:21,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:21,376 INFO L87 Difference]: Start difference. First operand 26276 states and 83406 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:21,855 INFO L93 Difference]: Finished difference Result 26515 states and 83825 transitions. [2021-06-12 19:29:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:29:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:21,895 INFO L225 Difference]: With dead ends: 26515 [2021-06-12 19:29:21,896 INFO L226 Difference]: Without dead ends: 26493 [2021-06-12 19:29:21,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:29:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2021-06-12 19:29:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 26252. [2021-06-12 19:29:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26252 states, 26251 states have (on average 3.174507637804274) internal successors, (83334), 26251 states have internal predecessors, (83334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 83334 transitions. [2021-06-12 19:29:22,490 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 83334 transitions. Word has length 25 [2021-06-12 19:29:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:22,490 INFO L482 AbstractCegarLoop]: Abstraction has 26252 states and 83334 transitions. [2021-06-12 19:29:22,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 83334 transitions. [2021-06-12 19:29:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:22,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:22,523 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:22,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:22,724 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1221619073, now seen corresponding path program 500 times [2021-06-12 19:29:22,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:22,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293899401] [2021-06-12 19:29:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:22,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293899401] [2021-06-12 19:29:22,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293899401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278988396] [2021-06-12 19:29:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:22,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278988396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:23,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:23,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-12 19:29:23,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676050381] [2021-06-12 19:29:23,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:23,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:23,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:23,110 INFO L87 Difference]: Start difference. First operand 26252 states and 83334 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:23,525 INFO L93 Difference]: Finished difference Result 27031 states and 85190 transitions. [2021-06-12 19:29:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:23,566 INFO L225 Difference]: With dead ends: 27031 [2021-06-12 19:29:23,566 INFO L226 Difference]: Without dead ends: 27021 [2021-06-12 19:29:23,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2021-06-12 19:29:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26424. [2021-06-12 19:29:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26424 states, 26423 states have (on average 3.1765885781326872) internal successors, (83935), 26423 states have internal predecessors, (83935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 83935 transitions. [2021-06-12 19:29:24,005 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 83935 transitions. Word has length 25 [2021-06-12 19:29:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:24,005 INFO L482 AbstractCegarLoop]: Abstraction has 26424 states and 83935 transitions. [2021-06-12 19:29:24,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 83935 transitions. [2021-06-12 19:29:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:24,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:24,042 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:24,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:24,243 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash 393083651, now seen corresponding path program 501 times [2021-06-12 19:29:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:24,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604483114] [2021-06-12 19:29:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:24,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:24,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604483114] [2021-06-12 19:29:24,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604483114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:24,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758512864] [2021-06-12 19:29:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:24,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:29:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:24,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:24,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758512864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:24,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:24,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-06-12 19:29:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976819858] [2021-06-12 19:29:24,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:24,624 INFO L87 Difference]: Start difference. First operand 26424 states and 83935 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:25,028 INFO L93 Difference]: Finished difference Result 27015 states and 85143 transitions. [2021-06-12 19:29:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:25,069 INFO L225 Difference]: With dead ends: 27015 [2021-06-12 19:29:25,069 INFO L226 Difference]: Without dead ends: 27008 [2021-06-12 19:29:25,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2021-06-12 19:29:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 26408. [2021-06-12 19:29:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26408 states, 26407 states have (on average 3.176506229408869) internal successors, (83882), 26407 states have internal predecessors, (83882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26408 states to 26408 states and 83882 transitions. [2021-06-12 19:29:25,674 INFO L78 Accepts]: Start accepts. Automaton has 26408 states and 83882 transitions. Word has length 25 [2021-06-12 19:29:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:25,674 INFO L482 AbstractCegarLoop]: Abstraction has 26408 states and 83882 transitions. [2021-06-12 19:29:25,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 26408 states and 83882 transitions. [2021-06-12 19:29:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:25,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:25,706 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:25,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-06-12 19:29:25,906 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash -650164267, now seen corresponding path program 502 times [2021-06-12 19:29:25,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:25,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443536695] [2021-06-12 19:29:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:26,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:26,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443536695] [2021-06-12 19:29:26,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443536695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:26,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757936243] [2021-06-12 19:29:26,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:26,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:26,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757936243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:26,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:26,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:29:26,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065142798] [2021-06-12 19:29:26,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:26,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:26,280 INFO L87 Difference]: Start difference. First operand 26408 states and 83882 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:26,774 INFO L93 Difference]: Finished difference Result 27006 states and 85093 transitions. [2021-06-12 19:29:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:29:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:26,814 INFO L225 Difference]: With dead ends: 27006 [2021-06-12 19:29:26,814 INFO L226 Difference]: Without dead ends: 26993 [2021-06-12 19:29:26,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2021-06-12 19:29:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26403. [2021-06-12 19:29:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26403 states, 26402 states have (on average 3.176312400575714) internal successors, (83861), 26402 states have internal predecessors, (83861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26403 states to 26403 states and 83861 transitions. [2021-06-12 19:29:27,258 INFO L78 Accepts]: Start accepts. Automaton has 26403 states and 83861 transitions. Word has length 25 [2021-06-12 19:29:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:27,258 INFO L482 AbstractCegarLoop]: Abstraction has 26403 states and 83861 transitions. [2021-06-12 19:29:27,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26403 states and 83861 transitions. [2021-06-12 19:29:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:27,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:27,292 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:27,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:27,492 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:27,492 INFO L82 PathProgramCache]: Analyzing trace with hash -114934465, now seen corresponding path program 503 times [2021-06-12 19:29:27,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:27,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251383679] [2021-06-12 19:29:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:27,765 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-12 19:29:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:27,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251383679] [2021-06-12 19:29:27,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251383679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212421376] [2021-06-12 19:29:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:27,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:29:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212421376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:28,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:28,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:29:28,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313701802] [2021-06-12 19:29:28,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:28,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:28,121 INFO L87 Difference]: Start difference. First operand 26403 states and 83861 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:28,653 INFO L93 Difference]: Finished difference Result 27006 states and 85046 transitions. [2021-06-12 19:29:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:29:28,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:28,691 INFO L225 Difference]: With dead ends: 27006 [2021-06-12 19:29:28,691 INFO L226 Difference]: Without dead ends: 26990 [2021-06-12 19:29:28,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-06-12 19:29:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26398. [2021-06-12 19:29:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26398 states, 26397 states have (on average 3.176156381406978) internal successors, (83841), 26397 states have internal predecessors, (83841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26398 states to 26398 states and 83841 transitions. [2021-06-12 19:29:29,115 INFO L78 Accepts]: Start accepts. Automaton has 26398 states and 83841 transitions. Word has length 25 [2021-06-12 19:29:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:29,115 INFO L482 AbstractCegarLoop]: Abstraction has 26398 states and 83841 transitions. [2021-06-12 19:29:29,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 26398 states and 83841 transitions. [2021-06-12 19:29:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:29,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:29,149 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:29,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-12 19:29:29,350 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:29,350 INFO L82 PathProgramCache]: Analyzing trace with hash -702679787, now seen corresponding path program 504 times [2021-06-12 19:29:29,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:29,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778859220] [2021-06-12 19:29:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:29,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:29,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778859220] [2021-06-12 19:29:29,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778859220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:29,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413904985] [2021-06-12 19:29:29,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:29,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:29:29,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:29,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:29,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413904985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:29,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:29,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:29:29,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83026933] [2021-06-12 19:29:29,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:29,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:29,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:29,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:29,715 INFO L87 Difference]: Start difference. First operand 26398 states and 83841 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:30,291 INFO L93 Difference]: Finished difference Result 27010 states and 85005 transitions. [2021-06-12 19:29:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:29:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:30,333 INFO L225 Difference]: With dead ends: 27010 [2021-06-12 19:29:30,333 INFO L226 Difference]: Without dead ends: 26991 [2021-06-12 19:29:30,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:29:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26991 states. [2021-06-12 19:29:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26991 to 26393. [2021-06-12 19:29:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26393 states, 26392 states have (on average 3.176038193391937) internal successors, (83822), 26392 states have internal predecessors, (83822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 83822 transitions. [2021-06-12 19:29:30,766 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 83822 transitions. Word has length 25 [2021-06-12 19:29:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:30,766 INFO L482 AbstractCegarLoop]: Abstraction has 26393 states and 83822 transitions. [2021-06-12 19:29:30,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 83822 transitions. [2021-06-12 19:29:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:30,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:30,800 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:31,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:31,000 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:31,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1742915585, now seen corresponding path program 505 times [2021-06-12 19:29:31,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:31,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174569968] [2021-06-12 19:29:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:31,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:31,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174569968] [2021-06-12 19:29:31,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174569968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:31,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897713586] [2021-06-12 19:29:31,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:31,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:31,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897713586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:31,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:31,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:29:31,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461589499] [2021-06-12 19:29:31,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:31,539 INFO L87 Difference]: Start difference. First operand 26393 states and 83822 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:32,113 INFO L93 Difference]: Finished difference Result 26898 states and 84763 transitions. [2021-06-12 19:29:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:32,157 INFO L225 Difference]: With dead ends: 26898 [2021-06-12 19:29:32,157 INFO L226 Difference]: Without dead ends: 26876 [2021-06-12 19:29:32,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:29:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26876 states. [2021-06-12 19:29:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26876 to 26388. [2021-06-12 19:29:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26388 states, 26387 states have (on average 3.175957858036154) internal successors, (83804), 26387 states have internal predecessors, (83804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26388 states to 26388 states and 83804 transitions. [2021-06-12 19:29:32,618 INFO L78 Accepts]: Start accepts. Automaton has 26388 states and 83804 transitions. Word has length 25 [2021-06-12 19:29:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:32,619 INFO L482 AbstractCegarLoop]: Abstraction has 26388 states and 83804 transitions. [2021-06-12 19:29:32,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 26388 states and 83804 transitions. [2021-06-12 19:29:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 19:29:32,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:32,652 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:32,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable946 [2021-06-12 19:29:32,853 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:32,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:32,853 INFO L82 PathProgramCache]: Analyzing trace with hash 369513045, now seen corresponding path program 506 times [2021-06-12 19:29:32,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:32,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506498678] [2021-06-12 19:29:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:33,006 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 19:29:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:33,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:33,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506498678] [2021-06-12 19:29:33,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506498678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:33,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326534126] [2021-06-12 19:29:33,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:33,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:29:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:33,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326534126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:33,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:33,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-12 19:29:33,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552465703] [2021-06-12 19:29:33,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:29:33,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:33,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:29:33,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:29:33,348 INFO L87 Difference]: Start difference. First operand 26388 states and 83804 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:33,948 INFO L93 Difference]: Finished difference Result 26777 states and 84498 transitions. [2021-06-12 19:29:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 19:29:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:33,991 INFO L225 Difference]: With dead ends: 26777 [2021-06-12 19:29:33,991 INFO L226 Difference]: Without dead ends: 26770 [2021-06-12 19:29:33,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:29:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26770 states. [2021-06-12 19:29:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26770 to 26383. [2021-06-12 19:29:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26383 states, 26382 states have (on average 3.1759912061253885) internal successors, (83789), 26382 states have internal predecessors, (83789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26383 states to 26383 states and 83789 transitions. [2021-06-12 19:29:34,545 INFO L78 Accepts]: Start accepts. Automaton has 26383 states and 83789 transitions. Word has length 25 [2021-06-12 19:29:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:34,545 INFO L482 AbstractCegarLoop]: Abstraction has 26383 states and 83789 transitions. [2021-06-12 19:29:34,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26383 states and 83789 transitions. [2021-06-12 19:29:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:34,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:34,583 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:34,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:34,784 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:34,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1225505269, now seen corresponding path program 507 times [2021-06-12 19:29:34,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:34,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610221834] [2021-06-12 19:29:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:34,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:34,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610221834] [2021-06-12 19:29:34,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610221834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:34,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355155998] [2021-06-12 19:29:34,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:34,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:29:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355155998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:35,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:35,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-12 19:29:35,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228931170] [2021-06-12 19:29:35,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:35,034 INFO L87 Difference]: Start difference. First operand 26383 states and 83789 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:35,309 INFO L93 Difference]: Finished difference Result 34009 states and 106082 transitions. [2021-06-12 19:29:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:29:35,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:35,368 INFO L225 Difference]: With dead ends: 34009 [2021-06-12 19:29:35,368 INFO L226 Difference]: Without dead ends: 33983 [2021-06-12 19:29:35,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:29:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2021-06-12 19:29:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 26378. [2021-06-12 19:29:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26378 states, 26377 states have (on average 3.1762141259430563) internal successors, (83779), 26377 states have internal predecessors, (83779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26378 states to 26378 states and 83779 transitions. [2021-06-12 19:29:36,192 INFO L78 Accepts]: Start accepts. Automaton has 26378 states and 83779 transitions. Word has length 26 [2021-06-12 19:29:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:36,192 INFO L482 AbstractCegarLoop]: Abstraction has 26378 states and 83779 transitions. [2021-06-12 19:29:36,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 26378 states and 83779 transitions. [2021-06-12 19:29:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:36,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:36,234 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:36,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:36,435 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1488462363, now seen corresponding path program 508 times [2021-06-12 19:29:36,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:36,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122939889] [2021-06-12 19:29:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:36,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:36,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122939889] [2021-06-12 19:29:36,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122939889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:36,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301449770] [2021-06-12 19:29:36,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:36,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:36,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:36,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:36,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301449770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:36,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:36,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-12 19:29:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378189290] [2021-06-12 19:29:36,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:36,666 INFO L87 Difference]: Start difference. First operand 26378 states and 83779 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:37,008 INFO L93 Difference]: Finished difference Result 34313 states and 106998 transitions. [2021-06-12 19:29:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:37,073 INFO L225 Difference]: With dead ends: 34313 [2021-06-12 19:29:37,073 INFO L226 Difference]: Without dead ends: 34313 [2021-06-12 19:29:37,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:29:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34313 states. [2021-06-12 19:29:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34313 to 26571. [2021-06-12 19:29:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26571 states, 26570 states have (on average 3.174934136243884) internal successors, (84358), 26570 states have internal predecessors, (84358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26571 states to 26571 states and 84358 transitions. [2021-06-12 19:29:37,705 INFO L78 Accepts]: Start accepts. Automaton has 26571 states and 84358 transitions. Word has length 26 [2021-06-12 19:29:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:37,706 INFO L482 AbstractCegarLoop]: Abstraction has 26571 states and 84358 transitions. [2021-06-12 19:29:37,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 26571 states and 84358 transitions. [2021-06-12 19:29:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:37,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:37,741 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:37,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-06-12 19:29:37,942 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1597240143, now seen corresponding path program 509 times [2021-06-12 19:29:37,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:37,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38442022] [2021-06-12 19:29:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:38,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:38,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38442022] [2021-06-12 19:29:38,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38442022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:38,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827910129] [2021-06-12 19:29:38,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:38,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:29:38,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:38,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827910129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:38,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:38,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104696239] [2021-06-12 19:29:38,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:38,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:38,284 INFO L87 Difference]: Start difference. First operand 26571 states and 84358 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:39,511 INFO L93 Difference]: Finished difference Result 38199 states and 118872 transitions. [2021-06-12 19:29:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 19:29:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:39,626 INFO L225 Difference]: With dead ends: 38199 [2021-06-12 19:29:39,626 INFO L226 Difference]: Without dead ends: 38187 [2021-06-12 19:29:39,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 1003.4ms TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:29:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2021-06-12 19:29:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 30268. [2021-06-12 19:29:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30268 states, 30267 states have (on average 3.1952621667162258) internal successors, (96711), 30267 states have internal predecessors, (96711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30268 states to 30268 states and 96711 transitions. [2021-06-12 19:29:40,225 INFO L78 Accepts]: Start accepts. Automaton has 30268 states and 96711 transitions. Word has length 26 [2021-06-12 19:29:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:40,225 INFO L482 AbstractCegarLoop]: Abstraction has 30268 states and 96711 transitions. [2021-06-12 19:29:40,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 30268 states and 96711 transitions. [2021-06-12 19:29:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:40,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:40,278 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-12 19:29:40,485 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2126272347, now seen corresponding path program 510 times [2021-06-12 19:29:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560630603] [2021-06-12 19:29:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:40,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560630603] [2021-06-12 19:29:40,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560630603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841271388] [2021-06-12 19:29:40,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:40,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:29:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:40,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:40,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841271388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:40,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:40,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049796276] [2021-06-12 19:29:40,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:40,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:40,849 INFO L87 Difference]: Start difference. First operand 30268 states and 96711 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:42,181 INFO L93 Difference]: Finished difference Result 37783 states and 117254 transitions. [2021-06-12 19:29:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-12 19:29:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:42,236 INFO L225 Difference]: With dead ends: 37783 [2021-06-12 19:29:42,236 INFO L226 Difference]: Without dead ends: 37777 [2021-06-12 19:29:42,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 1042.6ms TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 19:29:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37777 states. [2021-06-12 19:29:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37777 to 28751. [2021-06-12 19:29:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28751 states, 28750 states have (on average 3.173495652173913) internal successors, (91238), 28750 states have internal predecessors, (91238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28751 states to 28751 states and 91238 transitions. [2021-06-12 19:29:42,812 INFO L78 Accepts]: Start accepts. Automaton has 28751 states and 91238 transitions. Word has length 26 [2021-06-12 19:29:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:42,812 INFO L482 AbstractCegarLoop]: Abstraction has 28751 states and 91238 transitions. [2021-06-12 19:29:42,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 28751 states and 91238 transitions. [2021-06-12 19:29:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:42,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:42,850 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:43,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:43,051 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash 237123403, now seen corresponding path program 511 times [2021-06-12 19:29:43,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:43,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509845184] [2021-06-12 19:29:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:43,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:43,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509845184] [2021-06-12 19:29:43,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509845184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:43,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269074271] [2021-06-12 19:29:43,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:43,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269074271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:43,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:43,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:43,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903960744] [2021-06-12 19:29:43,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:43,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:43,431 INFO L87 Difference]: Start difference. First operand 28751 states and 91238 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:45,017 INFO L93 Difference]: Finished difference Result 33431 states and 104589 transitions. [2021-06-12 19:29:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 19:29:45,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:45,067 INFO L225 Difference]: With dead ends: 33431 [2021-06-12 19:29:45,067 INFO L226 Difference]: Without dead ends: 33431 [2021-06-12 19:29:45,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 1278.3ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 19:29:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2021-06-12 19:29:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 30211. [2021-06-12 19:29:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30211 states, 30210 states have (on average 3.1860973187686197) internal successors, (96252), 30210 states have internal predecessors, (96252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30211 states to 30211 states and 96252 transitions. [2021-06-12 19:29:45,621 INFO L78 Accepts]: Start accepts. Automaton has 30211 states and 96252 transitions. Word has length 26 [2021-06-12 19:29:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:45,621 INFO L482 AbstractCegarLoop]: Abstraction has 30211 states and 96252 transitions. [2021-06-12 19:29:45,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 30211 states and 96252 transitions. [2021-06-12 19:29:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:45,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:45,659 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:45,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:45,859 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash -227467701, now seen corresponding path program 512 times [2021-06-12 19:29:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:45,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538875731] [2021-06-12 19:29:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:45,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538875731] [2021-06-12 19:29:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538875731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138943693] [2021-06-12 19:29:45,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:45,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:45,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:46,182 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:29:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138943693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:46,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:46,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414928810] [2021-06-12 19:29:46,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:46,223 INFO L87 Difference]: Start difference. First operand 30211 states and 96252 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:47,638 INFO L93 Difference]: Finished difference Result 32625 states and 102515 transitions. [2021-06-12 19:29:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 19:29:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:47,689 INFO L225 Difference]: With dead ends: 32625 [2021-06-12 19:29:47,689 INFO L226 Difference]: Without dead ends: 32621 [2021-06-12 19:29:47,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 1298.1ms TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 19:29:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32621 states. [2021-06-12 19:29:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32621 to 27450. [2021-06-12 19:29:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27450 states, 27449 states have (on average 3.1584757186054135) internal successors, (86697), 27449 states have internal predecessors, (86697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27450 states to 27450 states and 86697 transitions. [2021-06-12 19:29:48,362 INFO L78 Accepts]: Start accepts. Automaton has 27450 states and 86697 transitions. Word has length 26 [2021-06-12 19:29:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:48,362 INFO L482 AbstractCegarLoop]: Abstraction has 27450 states and 86697 transitions. [2021-06-12 19:29:48,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 27450 states and 86697 transitions. [2021-06-12 19:29:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:48,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:48,397 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:48,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:48,598 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:48,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1591042545, now seen corresponding path program 513 times [2021-06-12 19:29:48,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:48,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210305712] [2021-06-12 19:29:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:48,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:48,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210305712] [2021-06-12 19:29:48,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210305712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:48,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790510100] [2021-06-12 19:29:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:48,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:29:48,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:48,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790510100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:48,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:48,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:48,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094936725] [2021-06-12 19:29:48,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:48,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:48,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:48,862 INFO L87 Difference]: Start difference. First operand 27450 states and 86697 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:50,024 INFO L93 Difference]: Finished difference Result 35448 states and 108975 transitions. [2021-06-12 19:29:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 19:29:50,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:50,077 INFO L225 Difference]: With dead ends: 35448 [2021-06-12 19:29:50,078 INFO L226 Difference]: Without dead ends: 35439 [2021-06-12 19:29:50,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:29:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35439 states. [2021-06-12 19:29:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35439 to 27796. [2021-06-12 19:29:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27796 states, 27795 states have (on average 3.1588774959525097) internal successors, (87801), 27795 states have internal predecessors, (87801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27796 states to 27796 states and 87801 transitions. [2021-06-12 19:29:50,703 INFO L78 Accepts]: Start accepts. Automaton has 27796 states and 87801 transitions. Word has length 26 [2021-06-12 19:29:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:50,703 INFO L482 AbstractCegarLoop]: Abstraction has 27796 states and 87801 transitions. [2021-06-12 19:29:50,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 27796 states and 87801 transitions. [2021-06-12 19:29:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:50,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:50,741 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:50,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-12 19:29:50,941 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:50,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2116179429, now seen corresponding path program 514 times [2021-06-12 19:29:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:50,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535496158] [2021-06-12 19:29:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:51,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:51,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535496158] [2021-06-12 19:29:51,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535496158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:51,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814427560] [2021-06-12 19:29:51,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:51,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:51,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:51,211 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:29:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814427560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:51,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8251429] [2021-06-12 19:29:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:51,314 INFO L87 Difference]: Start difference. First operand 27796 states and 87801 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:52,324 INFO L93 Difference]: Finished difference Result 35824 states and 110259 transitions. [2021-06-12 19:29:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 19:29:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:52,381 INFO L225 Difference]: With dead ends: 35824 [2021-06-12 19:29:52,381 INFO L226 Difference]: Without dead ends: 35812 [2021-06-12 19:29:52,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 19:29:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-12 19:29:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 28033. [2021-06-12 19:29:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28033 states, 28032 states have (on average 3.161208618721461) internal successors, (88615), 28032 states have internal predecessors, (88615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 88615 transitions. [2021-06-12 19:29:53,175 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 88615 transitions. Word has length 26 [2021-06-12 19:29:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:53,175 INFO L482 AbstractCegarLoop]: Abstraction has 28033 states and 88615 transitions. [2021-06-12 19:29:53,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 88615 transitions. [2021-06-12 19:29:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:53,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:53,210 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:53,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:53,410 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1075943631, now seen corresponding path program 515 times [2021-06-12 19:29:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:53,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231984892] [2021-06-12 19:29:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:53,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231984892] [2021-06-12 19:29:53,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231984892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729345313] [2021-06-12 19:29:53,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:53,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:29:53,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:53,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729345313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:53,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:53,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:53,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109738308] [2021-06-12 19:29:53,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:53,665 INFO L87 Difference]: Start difference. First operand 28033 states and 88615 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:54,657 INFO L93 Difference]: Finished difference Result 36830 states and 113799 transitions. [2021-06-12 19:29:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 19:29:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:54,710 INFO L225 Difference]: With dead ends: 36830 [2021-06-12 19:29:54,710 INFO L226 Difference]: Without dead ends: 36815 [2021-06-12 19:29:54,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 744.1ms TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 19:29:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36815 states. [2021-06-12 19:29:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36815 to 28168. [2021-06-12 19:29:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28168 states, 28167 states have (on average 3.161856072709199) internal successors, (89060), 28167 states have internal predecessors, (89060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 89060 transitions. [2021-06-12 19:29:55,324 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 89060 transitions. Word has length 26 [2021-06-12 19:29:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:55,324 INFO L482 AbstractCegarLoop]: Abstraction has 28168 states and 89060 transitions. [2021-06-12 19:29:55,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 89060 transitions. [2021-06-12 19:29:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:55,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:55,360 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:55,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-06-12 19:29:55,561 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1106595035, now seen corresponding path program 516 times [2021-06-12 19:29:55,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:55,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225705355] [2021-06-12 19:29:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:55,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:55,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225705355] [2021-06-12 19:29:55,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225705355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:55,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741202709] [2021-06-12 19:29:55,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:55,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:29:55,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:55,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741202709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:55,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:55,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:55,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783578974] [2021-06-12 19:29:55,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:55,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:55,811 INFO L87 Difference]: Start difference. First operand 28168 states and 89060 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:56,768 INFO L93 Difference]: Finished difference Result 38080 states and 118134 transitions. [2021-06-12 19:29:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 19:29:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:56,830 INFO L225 Difference]: With dead ends: 38080 [2021-06-12 19:29:56,830 INFO L226 Difference]: Without dead ends: 38062 [2021-06-12 19:29:56,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 687.4ms TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 19:29:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38062 states. [2021-06-12 19:29:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38062 to 28241. [2021-06-12 19:29:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28241 states, 28240 states have (on average 3.1613668555240793) internal successors, (89277), 28240 states have internal predecessors, (89277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28241 states to 28241 states and 89277 transitions. [2021-06-12 19:29:57,561 INFO L78 Accepts]: Start accepts. Automaton has 28241 states and 89277 transitions. Word has length 26 [2021-06-12 19:29:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:57,562 INFO L482 AbstractCegarLoop]: Abstraction has 28241 states and 89277 transitions. [2021-06-12 19:29:57,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28241 states and 89277 transitions. [2021-06-12 19:29:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:57,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:57,598 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:57,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-12 19:29:57,799 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash -45816945, now seen corresponding path program 517 times [2021-06-12 19:29:57,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:57,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701325684] [2021-06-12 19:29:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:57,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:57,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701325684] [2021-06-12 19:29:57,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701325684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:57,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207107105] [2021-06-12 19:29:57,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:57,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:57,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:58,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207107105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:58,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:58,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:29:58,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312451741] [2021-06-12 19:29:58,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:58,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:58,058 INFO L87 Difference]: Start difference. First operand 28241 states and 89277 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:58,839 INFO L93 Difference]: Finished difference Result 38378 states and 118948 transitions. [2021-06-12 19:29:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:29:58,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:29:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:59,049 INFO L225 Difference]: With dead ends: 38378 [2021-06-12 19:29:59,050 INFO L226 Difference]: Without dead ends: 38357 [2021-06-12 19:29:59,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 642.7ms TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 19:29:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38357 states. [2021-06-12 19:29:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38357 to 28289. [2021-06-12 19:29:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.1601032239819005) internal successors, (89393), 28288 states have internal predecessors, (89393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89393 transitions. [2021-06-12 19:29:59,625 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89393 transitions. Word has length 26 [2021-06-12 19:29:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:59,625 INFO L482 AbstractCegarLoop]: Abstraction has 28289 states and 89393 transitions. [2021-06-12 19:29:59,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89393 transitions. [2021-06-12 19:29:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:29:59,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:59,661 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:59,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable962 [2021-06-12 19:29:59,862 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:59,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1521434523, now seen corresponding path program 518 times [2021-06-12 19:29:59,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:59,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654246056] [2021-06-12 19:29:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:59,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:59,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654246056] [2021-06-12 19:29:59,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654246056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:59,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595858692] [2021-06-12 19:29:59,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:59,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:29:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595858692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:00,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:00,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:30:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839263746] [2021-06-12 19:30:00,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:00,130 INFO L87 Difference]: Start difference. First operand 28289 states and 89393 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:00,682 INFO L93 Difference]: Finished difference Result 35202 states and 108627 transitions. [2021-06-12 19:30:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:30:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:00,738 INFO L225 Difference]: With dead ends: 35202 [2021-06-12 19:30:00,739 INFO L226 Difference]: Without dead ends: 35181 [2021-06-12 19:30:00,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 19:30:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35181 states. [2021-06-12 19:30:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35181 to 28289. [2021-06-12 19:30:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.159855769230769) internal successors, (89386), 28288 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89386 transitions. [2021-06-12 19:30:01,544 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89386 transitions. Word has length 26 [2021-06-12 19:30:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:01,545 INFO L482 AbstractCegarLoop]: Abstraction has 28289 states and 89386 transitions. [2021-06-12 19:30:01,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89386 transitions. [2021-06-12 19:30:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:01,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:01,583 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:01,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:01,783 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1586238833, now seen corresponding path program 519 times [2021-06-12 19:30:01,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:01,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213880789] [2021-06-12 19:30:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:01,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:01,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213880789] [2021-06-12 19:30:01,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213880789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:01,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386593190] [2021-06-12 19:30:01,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:01,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:30:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386593190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:02,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:02,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-12 19:30:02,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854009737] [2021-06-12 19:30:02,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:02,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:02,063 INFO L87 Difference]: Start difference. First operand 28289 states and 89386 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:02,490 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 19:30:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:03,711 INFO L93 Difference]: Finished difference Result 31417 states and 97881 transitions. [2021-06-12 19:30:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-12 19:30:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:03,768 INFO L225 Difference]: With dead ends: 31417 [2021-06-12 19:30:03,768 INFO L226 Difference]: Without dead ends: 31402 [2021-06-12 19:30:03,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 1364.8ms TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 19:30:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31402 states. [2021-06-12 19:30:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31402 to 29607. [2021-06-12 19:30:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29607 states, 29606 states have (on average 3.1732419104235627) internal successors, (93947), 29606 states have internal predecessors, (93947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29607 states to 29607 states and 93947 transitions. [2021-06-12 19:30:04,374 INFO L78 Accepts]: Start accepts. Automaton has 29607 states and 93947 transitions. Word has length 26 [2021-06-12 19:30:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:04,374 INFO L482 AbstractCegarLoop]: Abstraction has 29607 states and 93947 transitions. [2021-06-12 19:30:04,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29607 states and 93947 transitions. [2021-06-12 19:30:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:04,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:04,415 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:04,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable964 [2021-06-12 19:30:04,616 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2050829937, now seen corresponding path program 520 times [2021-06-12 19:30:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:04,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838875174] [2021-06-12 19:30:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:04,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:04,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838875174] [2021-06-12 19:30:04,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838875174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:04,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949162358] [2021-06-12 19:30:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:04,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:04,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:04,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:04,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:05,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949162358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:05,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:05,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-12 19:30:05,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147170036] [2021-06-12 19:30:05,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:05,004 INFO L87 Difference]: Start difference. First operand 29607 states and 93947 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:05,762 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-12 19:30:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:06,837 INFO L93 Difference]: Finished difference Result 30731 states and 96043 transitions. [2021-06-12 19:30:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-12 19:30:06,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:06,893 INFO L225 Difference]: With dead ends: 30731 [2021-06-12 19:30:06,893 INFO L226 Difference]: Without dead ends: 30719 [2021-06-12 19:30:06,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 1553.8ms TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 19:30:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30719 states. [2021-06-12 19:30:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30719 to 27213. [2021-06-12 19:30:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27213 states, 27212 states have (on average 3.1501543436719093) internal successors, (85722), 27212 states have internal predecessors, (85722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27213 states to 27213 states and 85722 transitions. [2021-06-12 19:30:07,434 INFO L78 Accepts]: Start accepts. Automaton has 27213 states and 85722 transitions. Word has length 26 [2021-06-12 19:30:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:07,434 INFO L482 AbstractCegarLoop]: Abstraction has 27213 states and 85722 transitions. [2021-06-12 19:30:07,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 27213 states and 85722 transitions. [2021-06-12 19:30:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:07,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:07,479 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:07,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:07,679 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2084429165, now seen corresponding path program 521 times [2021-06-12 19:30:07,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:07,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573584409] [2021-06-12 19:30:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:07,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:07,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573584409] [2021-06-12 19:30:07,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573584409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:07,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826977597] [2021-06-12 19:30:07,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:07,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:30:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:08,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826977597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:08,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:08,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-12 19:30:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057726678] [2021-06-12 19:30:08,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:30:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:30:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:30:08,027 INFO L87 Difference]: Start difference. First operand 27213 states and 85722 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:09,531 INFO L93 Difference]: Finished difference Result 28228 states and 87728 transitions. [2021-06-12 19:30:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 19:30:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:09,573 INFO L225 Difference]: With dead ends: 28228 [2021-06-12 19:30:09,573 INFO L226 Difference]: Without dead ends: 28220 [2021-06-12 19:30:09,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 1307.8ms TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 19:30:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2021-06-12 19:30:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27255. [2021-06-12 19:30:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27255 states, 27254 states have (on average 3.149262493578924) internal successors, (85830), 27254 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27255 states to 27255 states and 85830 transitions. [2021-06-12 19:30:10,111 INFO L78 Accepts]: Start accepts. Automaton has 27255 states and 85830 transitions. Word has length 26 [2021-06-12 19:30:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:10,111 INFO L482 AbstractCegarLoop]: Abstraction has 27255 states and 85830 transitions. [2021-06-12 19:30:10,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 27255 states and 85830 transitions. [2021-06-12 19:30:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:10,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:10,150 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:10,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:10,351 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2019073995, now seen corresponding path program 522 times [2021-06-12 19:30:10,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:10,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19024439] [2021-06-12 19:30:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:10,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19024439] [2021-06-12 19:30:10,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19024439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857158679] [2021-06-12 19:30:10,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:10,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:30:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:10,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857158679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:10,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:10,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-12 19:30:10,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919288479] [2021-06-12 19:30:10,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:10,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:10,600 INFO L87 Difference]: Start difference. First operand 27255 states and 85830 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:11,637 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-06-12 19:30:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:12,167 INFO L93 Difference]: Finished difference Result 30687 states and 95027 transitions. [2021-06-12 19:30:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 19:30:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:12,220 INFO L225 Difference]: With dead ends: 30687 [2021-06-12 19:30:12,221 INFO L226 Difference]: Without dead ends: 30660 [2021-06-12 19:30:12,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 1244.5ms TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 19:30:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30660 states. [2021-06-12 19:30:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30660 to 28569. [2021-06-12 19:30:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28569 states, 28568 states have (on average 3.1633646037524503) internal successors, (90371), 28568 states have internal predecessors, (90371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28569 states to 28569 states and 90371 transitions. [2021-06-12 19:30:12,799 INFO L78 Accepts]: Start accepts. Automaton has 28569 states and 90371 transitions. Word has length 26 [2021-06-12 19:30:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:12,799 INFO L482 AbstractCegarLoop]: Abstraction has 28569 states and 90371 transitions. [2021-06-12 19:30:12,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28569 states and 90371 transitions. [2021-06-12 19:30:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:12,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:12,835 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:13,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable967 [2021-06-12 19:30:13,036 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:13,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1554482891, now seen corresponding path program 523 times [2021-06-12 19:30:13,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:13,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198002427] [2021-06-12 19:30:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:13,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:13,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198002427] [2021-06-12 19:30:13,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198002427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:13,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146107882] [2021-06-12 19:30:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:13,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146107882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:13,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:13,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-12 19:30:13,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589088585] [2021-06-12 19:30:13,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:13,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:13,299 INFO L87 Difference]: Start difference. First operand 28569 states and 90371 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:15,020 INFO L93 Difference]: Finished difference Result 29868 states and 92929 transitions. [2021-06-12 19:30:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-12 19:30:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:15,067 INFO L225 Difference]: With dead ends: 29868 [2021-06-12 19:30:15,068 INFO L226 Difference]: Without dead ends: 29858 [2021-06-12 19:30:15,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 1459.4ms TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2021-06-12 19:30:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2021-06-12 19:30:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 26993. [2021-06-12 19:30:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 3.147191760521636) internal successors, (84949), 26992 states have internal predecessors, (84949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 84949 transitions. [2021-06-12 19:30:15,663 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 84949 transitions. Word has length 26 [2021-06-12 19:30:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:15,663 INFO L482 AbstractCegarLoop]: Abstraction has 26993 states and 84949 transitions. [2021-06-12 19:30:15,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 84949 transitions. [2021-06-12 19:30:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:15,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:15,700 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:15,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:15,901 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1520883663, now seen corresponding path program 524 times [2021-06-12 19:30:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:15,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178819108] [2021-06-12 19:30:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:15,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:15,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178819108] [2021-06-12 19:30:15,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178819108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:15,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906676961] [2021-06-12 19:30:15,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:16,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:16,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:16,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906676961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:16,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:16,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-12 19:30:16,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053642448] [2021-06-12 19:30:16,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:30:16,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:30:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:30:16,187 INFO L87 Difference]: Start difference. First operand 26993 states and 84949 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:17,794 INFO L93 Difference]: Finished difference Result 28470 states and 88158 transitions. [2021-06-12 19:30:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-12 19:30:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:17,841 INFO L225 Difference]: With dead ends: 28470 [2021-06-12 19:30:17,841 INFO L226 Difference]: Without dead ends: 28450 [2021-06-12 19:30:17,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 1289.2ms TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 19:30:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28450 states. [2021-06-12 19:30:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28450 to 26539. [2021-06-12 19:30:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26539 states, 26538 states have (on average 3.1459416685507575) internal successors, (83487), 26538 states have internal predecessors, (83487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26539 states to 26539 states and 83487 transitions. [2021-06-12 19:30:18,414 INFO L78 Accepts]: Start accepts. Automaton has 26539 states and 83487 transitions. Word has length 26 [2021-06-12 19:30:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:18,414 INFO L482 AbstractCegarLoop]: Abstraction has 26539 states and 83487 transitions. [2021-06-12 19:30:18,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 26539 states and 83487 transitions. [2021-06-12 19:30:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:18,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:18,450 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:18,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-06-12 19:30:18,651 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:18,651 INFO L82 PathProgramCache]: Analyzing trace with hash 479307595, now seen corresponding path program 525 times [2021-06-12 19:30:18,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:18,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853818299] [2021-06-12 19:30:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:18,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:18,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853818299] [2021-06-12 19:30:18,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853818299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:18,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303918379] [2021-06-12 19:30:18,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:18,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:30:18,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:18,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:18,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303918379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:18,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:18,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-12 19:30:18,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250447177] [2021-06-12 19:30:18,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:30:18,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:18,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:30:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:30:18,954 INFO L87 Difference]: Start difference. First operand 26539 states and 83487 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:20,531 INFO L93 Difference]: Finished difference Result 27713 states and 85920 transitions. [2021-06-12 19:30:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 19:30:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:20,578 INFO L225 Difference]: With dead ends: 27713 [2021-06-12 19:30:20,578 INFO L226 Difference]: Without dead ends: 27701 [2021-06-12 19:30:20,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 19:30:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27701 states. [2021-06-12 19:30:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27701 to 26577. [2021-06-12 19:30:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26577 states, 26576 states have (on average 3.145996387718242) internal successors, (83608), 26576 states have internal predecessors, (83608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26577 states to 26577 states and 83608 transitions. [2021-06-12 19:30:21,106 INFO L78 Accepts]: Start accepts. Automaton has 26577 states and 83608 transitions. Word has length 26 [2021-06-12 19:30:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:21,106 INFO L482 AbstractCegarLoop]: Abstraction has 26577 states and 83608 transitions. [2021-06-12 19:30:21,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 26577 states and 83608 transitions. [2021-06-12 19:30:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:21,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:21,140 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:21,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-12 19:30:21,340 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2114621967, now seen corresponding path program 526 times [2021-06-12 19:30:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:21,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950587246] [2021-06-12 19:30:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:21,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:21,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950587246] [2021-06-12 19:30:21,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950587246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:21,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026188588] [2021-06-12 19:30:21,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:21,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:21,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026188588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:21,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:21,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-12 19:30:21,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432019412] [2021-06-12 19:30:21,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:21,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:21,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:21,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:21,590 INFO L87 Difference]: Start difference. First operand 26577 states and 83608 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:22,997 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-12 19:30:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:23,158 INFO L93 Difference]: Finished difference Result 30369 states and 93818 transitions. [2021-06-12 19:30:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 19:30:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:23,203 INFO L225 Difference]: With dead ends: 30369 [2021-06-12 19:30:23,203 INFO L226 Difference]: Without dead ends: 30345 [2021-06-12 19:30:23,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1283.2ms TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 19:30:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30345 states. [2021-06-12 19:30:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30345 to 27835. [2021-06-12 19:30:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27835 states, 27834 states have (on average 3.158906373500036) internal successors, (87925), 27834 states have internal predecessors, (87925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27835 states to 27835 states and 87925 transitions. [2021-06-12 19:30:23,687 INFO L78 Accepts]: Start accepts. Automaton has 27835 states and 87925 transitions. Word has length 26 [2021-06-12 19:30:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:23,687 INFO L482 AbstractCegarLoop]: Abstraction has 27835 states and 87925 transitions. [2021-06-12 19:30:23,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 27835 states and 87925 transitions. [2021-06-12 19:30:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:23,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:23,867 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:24,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:24,068 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1650030863, now seen corresponding path program 527 times [2021-06-12 19:30:24,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:24,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524149875] [2021-06-12 19:30:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:24,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524149875] [2021-06-12 19:30:24,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524149875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832940303] [2021-06-12 19:30:24,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:24,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:30:24,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:24,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832940303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:24,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:24,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 25 [2021-06-12 19:30:24,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112384657] [2021-06-12 19:30:24,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:24,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:24,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:24,336 INFO L87 Difference]: Start difference. First operand 27835 states and 87925 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:26,058 INFO L93 Difference]: Finished difference Result 29357 states and 91107 transitions. [2021-06-12 19:30:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-12 19:30:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:26,121 INFO L225 Difference]: With dead ends: 29357 [2021-06-12 19:30:26,121 INFO L226 Difference]: Without dead ends: 29349 [2021-06-12 19:30:26,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 1347.6ms TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2021-06-12 19:30:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29349 states. [2021-06-12 19:30:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29349 to 26847. [2021-06-12 19:30:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26847 states, 26846 states have (on average 3.1492959845042092) internal successors, (84546), 26846 states have internal predecessors, (84546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26847 states to 26847 states and 84546 transitions. [2021-06-12 19:30:26,686 INFO L78 Accepts]: Start accepts. Automaton has 26847 states and 84546 transitions. Word has length 26 [2021-06-12 19:30:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:26,686 INFO L482 AbstractCegarLoop]: Abstraction has 26847 states and 84546 transitions. [2021-06-12 19:30:26,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26847 states and 84546 transitions. [2021-06-12 19:30:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:26,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:26,723 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:26,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-12 19:30:26,924 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:26,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1616431635, now seen corresponding path program 528 times [2021-06-12 19:30:26,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29331289] [2021-06-12 19:30:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:26,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29331289] [2021-06-12 19:30:26,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29331289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4788169] [2021-06-12 19:30:26,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:27,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:30:27,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:27,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:27,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:27,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4788169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:27,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:27,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-12 19:30:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617634390] [2021-06-12 19:30:27,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:30:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:30:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:30:27,273 INFO L87 Difference]: Start difference. First operand 26847 states and 84546 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:28,846 INFO L93 Difference]: Finished difference Result 28643 states and 88679 transitions. [2021-06-12 19:30:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-12 19:30:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:28,910 INFO L225 Difference]: With dead ends: 28643 [2021-06-12 19:30:28,910 INFO L226 Difference]: Without dead ends: 28631 [2021-06-12 19:30:28,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 1415.5ms TimeCoverageRelationStatistics Valid=4043, Invalid=9529, Unknown=0, NotChecked=0, Total=13572 [2021-06-12 19:30:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28631 states. [2021-06-12 19:30:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28631 to 26673. [2021-06-12 19:30:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26673 states, 26672 states have (on average 3.1486577684463106) internal successors, (83981), 26672 states have internal predecessors, (83981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26673 states to 26673 states and 83981 transitions. [2021-06-12 19:30:29,441 INFO L78 Accepts]: Start accepts. Automaton has 26673 states and 83981 transitions. Word has length 26 [2021-06-12 19:30:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:29,441 INFO L482 AbstractCegarLoop]: Abstraction has 26673 states and 83981 transitions. [2021-06-12 19:30:29,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 26673 states and 83981 transitions. [2021-06-12 19:30:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:29,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:29,476 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:29,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:29,676 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash 574855567, now seen corresponding path program 529 times [2021-06-12 19:30:29,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:29,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844441156] [2021-06-12 19:30:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:29,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844441156] [2021-06-12 19:30:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844441156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333467463] [2021-06-12 19:30:29,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:29,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333467463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:29,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:29,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-12 19:30:29,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923158627] [2021-06-12 19:30:29,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:30:29,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:29,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:30:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:30:29,955 INFO L87 Difference]: Start difference. First operand 26673 states and 83981 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:31,617 INFO L93 Difference]: Finished difference Result 28561 states and 88437 transitions. [2021-06-12 19:30:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 19:30:31,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:31,687 INFO L225 Difference]: With dead ends: 28561 [2021-06-12 19:30:31,687 INFO L226 Difference]: Without dead ends: 28537 [2021-06-12 19:30:31,688 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 1359.1ms TimeCoverageRelationStatistics Valid=3869, Invalid=9241, Unknown=0, NotChecked=0, Total=13110 [2021-06-12 19:30:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28537 states. [2021-06-12 19:30:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28537 to 26427. [2021-06-12 19:30:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26427 states, 26426 states have (on average 3.1503821993491257) internal successors, (83252), 26426 states have internal predecessors, (83252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26427 states to 26427 states and 83252 transitions. [2021-06-12 19:30:32,312 INFO L78 Accepts]: Start accepts. Automaton has 26427 states and 83252 transitions. Word has length 26 [2021-06-12 19:30:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:32,312 INFO L482 AbstractCegarLoop]: Abstraction has 26427 states and 83252 transitions. [2021-06-12 19:30:32,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 26427 states and 83252 transitions. [2021-06-12 19:30:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:32,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:32,347 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:32,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-06-12 19:30:32,548 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1649231469, now seen corresponding path program 530 times [2021-06-12 19:30:32,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:32,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838191647] [2021-06-12 19:30:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:32,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838191647] [2021-06-12 19:30:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838191647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785759331] [2021-06-12 19:30:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:32,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:32,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785759331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:32,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:32,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-12 19:30:32,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062448144] [2021-06-12 19:30:32,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 19:30:32,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:32,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 19:30:32,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:30:32,837 INFO L87 Difference]: Start difference. First operand 26427 states and 83252 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:34,190 INFO L93 Difference]: Finished difference Result 27859 states and 86438 transitions. [2021-06-12 19:30:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-12 19:30:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:34,233 INFO L225 Difference]: With dead ends: 27859 [2021-06-12 19:30:34,233 INFO L226 Difference]: Without dead ends: 27843 [2021-06-12 19:30:34,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 1187.1ms TimeCoverageRelationStatistics Valid=3820, Invalid=9062, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 19:30:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27843 states. [2021-06-12 19:30:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27843 to 26477. [2021-06-12 19:30:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26477 states, 26476 states have (on average 3.1508536032633327) internal successors, (83422), 26476 states have internal predecessors, (83422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26477 states to 26477 states and 83422 transitions. [2021-06-12 19:30:34,772 INFO L78 Accepts]: Start accepts. Automaton has 26477 states and 83422 transitions. Word has length 26 [2021-06-12 19:30:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:34,772 INFO L482 AbstractCegarLoop]: Abstraction has 26477 states and 83422 transitions. [2021-06-12 19:30:34,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26477 states and 83422 transitions. [2021-06-12 19:30:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:34,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:34,806 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:35,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:35,006 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 781641803, now seen corresponding path program 531 times [2021-06-12 19:30:35,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:35,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759961847] [2021-06-12 19:30:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:35,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759961847] [2021-06-12 19:30:35,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759961847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461363059] [2021-06-12 19:30:35,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:35,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:30:35,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461363059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-12 19:30:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960082257] [2021-06-12 19:30:35,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:35,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:35,252 INFO L87 Difference]: Start difference. First operand 26477 states and 83422 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:36,633 INFO L93 Difference]: Finished difference Result 30895 states and 95482 transitions. [2021-06-12 19:30:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 19:30:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:36,683 INFO L225 Difference]: With dead ends: 30895 [2021-06-12 19:30:36,683 INFO L226 Difference]: Without dead ends: 30874 [2021-06-12 19:30:36,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 1136.8ms TimeCoverageRelationStatistics Valid=2988, Invalid=5568, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 19:30:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2021-06-12 19:30:37,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 27557. [2021-06-12 19:30:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27557 states, 27556 states have (on average 3.16014661053854) internal successors, (87081), 27556 states have internal predecessors, (87081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27557 states to 27557 states and 87081 transitions. [2021-06-12 19:30:37,397 INFO L78 Accepts]: Start accepts. Automaton has 27557 states and 87081 transitions. Word has length 26 [2021-06-12 19:30:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:37,397 INFO L482 AbstractCegarLoop]: Abstraction has 27557 states and 87081 transitions. [2021-06-12 19:30:37,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27557 states and 87081 transitions. [2021-06-12 19:30:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:37,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:37,434 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:37,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-12 19:30:37,634 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash 317050699, now seen corresponding path program 532 times [2021-06-12 19:30:37,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:37,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050574580] [2021-06-12 19:30:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:37,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:37,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050574580] [2021-06-12 19:30:37,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050574580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:37,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835791645] [2021-06-12 19:30:37,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:37,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:37,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:37,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:37,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835791645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:37,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:37,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-06-12 19:30:37,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551846013] [2021-06-12 19:30:37,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:37,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:37,881 INFO L87 Difference]: Start difference. First operand 27557 states and 87081 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:39,776 INFO L93 Difference]: Finished difference Result 29430 states and 91212 transitions. [2021-06-12 19:30:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-12 19:30:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:39,831 INFO L225 Difference]: With dead ends: 29430 [2021-06-12 19:30:39,831 INFO L226 Difference]: Without dead ends: 29424 [2021-06-12 19:30:39,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 1614.6ms TimeCoverageRelationStatistics Valid=4713, Invalid=11289, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 19:30:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29424 states. [2021-06-12 19:30:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29424 to 27158. [2021-06-12 19:30:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27158 states, 27157 states have (on average 3.156165997716979) internal successors, (85712), 27157 states have internal predecessors, (85712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27158 states to 27158 states and 85712 transitions. [2021-06-12 19:30:40,349 INFO L78 Accepts]: Start accepts. Automaton has 27158 states and 85712 transitions. Word has length 26 [2021-06-12 19:30:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:40,350 INFO L482 AbstractCegarLoop]: Abstraction has 27158 states and 85712 transitions. [2021-06-12 19:30:40,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 27158 states and 85712 transitions. [2021-06-12 19:30:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:40,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:40,389 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:40,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable977 [2021-06-12 19:30:40,611 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash 283451471, now seen corresponding path program 533 times [2021-06-12 19:30:40,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:40,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740424028] [2021-06-12 19:30:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:40,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740424028] [2021-06-12 19:30:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740424028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669599587] [2021-06-12 19:30:40,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:40,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:30:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:40,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669599587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:40,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:40,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-12 19:30:40,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333380309] [2021-06-12 19:30:40,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:30:40,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:30:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:30:40,945 INFO L87 Difference]: Start difference. First operand 27158 states and 85712 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:41,152 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:30:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:42,738 INFO L93 Difference]: Finished difference Result 29381 states and 91072 transitions. [2021-06-12 19:30:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-12 19:30:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:42,782 INFO L225 Difference]: With dead ends: 29381 [2021-06-12 19:30:42,782 INFO L226 Difference]: Without dead ends: 29371 [2021-06-12 19:30:42,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 1532.6ms TimeCoverageRelationStatistics Valid=4224, Invalid=10538, Unknown=0, NotChecked=0, Total=14762 [2021-06-12 19:30:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2021-06-12 19:30:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 27039. [2021-06-12 19:30:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27039 states, 27038 states have (on average 3.1556328130778906) internal successors, (85322), 27038 states have internal predecessors, (85322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27039 states to 27039 states and 85322 transitions. [2021-06-12 19:30:43,322 INFO L78 Accepts]: Start accepts. Automaton has 27039 states and 85322 transitions. Word has length 26 [2021-06-12 19:30:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:43,322 INFO L482 AbstractCegarLoop]: Abstraction has 27039 states and 85322 transitions. [2021-06-12 19:30:43,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27039 states and 85322 transitions. [2021-06-12 19:30:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:43,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:43,359 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:43,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:43,560 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:43,560 INFO L82 PathProgramCache]: Analyzing trace with hash -758124597, now seen corresponding path program 534 times [2021-06-12 19:30:43,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:43,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198093023] [2021-06-12 19:30:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:43,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198093023] [2021-06-12 19:30:43,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198093023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354520126] [2021-06-12 19:30:43,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:43,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:30:43,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:43,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354520126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:43,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:43,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-12 19:30:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978097459] [2021-06-12 19:30:43,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:30:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:30:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:30:43,907 INFO L87 Difference]: Start difference. First operand 27039 states and 85322 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:45,572 INFO L93 Difference]: Finished difference Result 29421 states and 91215 transitions. [2021-06-12 19:30:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-12 19:30:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:45,613 INFO L225 Difference]: With dead ends: 29421 [2021-06-12 19:30:45,614 INFO L226 Difference]: Without dead ends: 29407 [2021-06-12 19:30:45,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4430 ImplicationChecksByTransitivity, 1386.4ms TimeCoverageRelationStatistics Valid=3872, Invalid=9934, Unknown=0, NotChecked=0, Total=13806 [2021-06-12 19:30:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29407 states. [2021-06-12 19:30:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29407 to 27188. [2021-06-12 19:30:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27188 states, 27187 states have (on average 3.1570235774451025) internal successors, (85830), 27187 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 85830 transitions. [2021-06-12 19:30:46,073 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 85830 transitions. Word has length 26 [2021-06-12 19:30:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:46,073 INFO L482 AbstractCegarLoop]: Abstraction has 27188 states and 85830 transitions. [2021-06-12 19:30:46,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 85830 transitions. [2021-06-12 19:30:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:46,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:46,111 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:46,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-12 19:30:46,311 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1312755663, now seen corresponding path program 535 times [2021-06-12 19:30:46,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:46,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270385918] [2021-06-12 19:30:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:46,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:46,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270385918] [2021-06-12 19:30:46,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270385918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:46,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901519970] [2021-06-12 19:30:46,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:46,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:46,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:46,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901519970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:46,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:46,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-12 19:30:46,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927136666] [2021-06-12 19:30:46,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 19:30:46,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 19:30:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:30:46,596 INFO L87 Difference]: Start difference. First operand 27188 states and 85830 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:48,205 INFO L93 Difference]: Finished difference Result 29725 states and 92236 transitions. [2021-06-12 19:30:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-12 19:30:48,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:48,250 INFO L225 Difference]: With dead ends: 29725 [2021-06-12 19:30:48,251 INFO L226 Difference]: Without dead ends: 29701 [2021-06-12 19:30:48,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4264 ImplicationChecksByTransitivity, 1416.3ms TimeCoverageRelationStatistics Valid=3652, Invalid=9458, Unknown=0, NotChecked=0, Total=13110 [2021-06-12 19:30:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29701 states. [2021-06-12 19:30:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29701 to 27357. [2021-06-12 19:30:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27357 states, 27356 states have (on average 3.1610615587074133) internal successors, (86474), 27356 states have internal predecessors, (86474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27357 states to 27357 states and 86474 transitions. [2021-06-12 19:30:48,896 INFO L78 Accepts]: Start accepts. Automaton has 27357 states and 86474 transitions. Word has length 26 [2021-06-12 19:30:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:48,896 INFO L482 AbstractCegarLoop]: Abstraction has 27357 states and 86474 transitions. [2021-06-12 19:30:48,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 27357 states and 86474 transitions. [2021-06-12 19:30:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:48,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:48,932 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:49,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-12 19:30:49,132 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1085534283, now seen corresponding path program 536 times [2021-06-12 19:30:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:49,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889603465] [2021-06-12 19:30:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:49,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:49,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889603465] [2021-06-12 19:30:49,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889603465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:49,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811264206] [2021-06-12 19:30:49,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:49,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:49,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:49,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:49,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811264206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:49,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:49,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-12 19:30:49,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573018838] [2021-06-12 19:30:49,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:30:49,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:30:49,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:30:49,433 INFO L87 Difference]: Start difference. First operand 27357 states and 86474 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:50,686 INFO L93 Difference]: Finished difference Result 29174 states and 90761 transitions. [2021-06-12 19:30:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 19:30:50,686 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:50,731 INFO L225 Difference]: With dead ends: 29174 [2021-06-12 19:30:50,731 INFO L226 Difference]: Without dead ends: 29154 [2021-06-12 19:30:50,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1136.9ms TimeCoverageRelationStatistics Valid=3559, Invalid=9097, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 19:30:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29154 states. [2021-06-12 19:30:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29154 to 27401. [2021-06-12 19:30:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27401 states, 27400 states have (on average 3.1614963503649633) internal successors, (86625), 27400 states have internal predecessors, (86625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27401 states to 27401 states and 86625 transitions. [2021-06-12 19:30:51,339 INFO L78 Accepts]: Start accepts. Automaton has 27401 states and 86625 transitions. Word has length 26 [2021-06-12 19:30:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:51,339 INFO L482 AbstractCegarLoop]: Abstraction has 27401 states and 86625 transitions. [2021-06-12 19:30:51,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27401 states and 86625 transitions. [2021-06-12 19:30:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:51,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:51,375 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:51,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:51,575 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:51,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:51,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1886037617, now seen corresponding path program 537 times [2021-06-12 19:30:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:51,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074404513] [2021-06-12 19:30:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:51,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074404513] [2021-06-12 19:30:51,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074404513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147467196] [2021-06-12 19:30:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:51,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:30:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:51,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:51,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147467196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:51,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:51,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-12 19:30:51,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136510986] [2021-06-12 19:30:51,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:51,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:51,817 INFO L87 Difference]: Start difference. First operand 27401 states and 86625 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:53,175 INFO L93 Difference]: Finished difference Result 33346 states and 103495 transitions. [2021-06-12 19:30:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 19:30:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:53,228 INFO L225 Difference]: With dead ends: 33346 [2021-06-12 19:30:53,228 INFO L226 Difference]: Without dead ends: 33328 [2021-06-12 19:30:53,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 1100.9ms TimeCoverageRelationStatistics Valid=2839, Invalid=5351, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:30:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33328 states. [2021-06-12 19:30:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33328 to 30042. [2021-06-12 19:30:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30042 states, 30041 states have (on average 3.181385439898805) internal successors, (95572), 30041 states have internal predecessors, (95572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30042 states to 30042 states and 95572 transitions. [2021-06-12 19:30:53,774 INFO L78 Accepts]: Start accepts. Automaton has 30042 states and 95572 transitions. Word has length 26 [2021-06-12 19:30:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:53,774 INFO L482 AbstractCegarLoop]: Abstraction has 30042 states and 95572 transitions. [2021-06-12 19:30:53,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 30042 states and 95572 transitions. [2021-06-12 19:30:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:53,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:53,812 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:54,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-12 19:30:54,012 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1944338575, now seen corresponding path program 538 times [2021-06-12 19:30:54,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:54,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000056062] [2021-06-12 19:30:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:54,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000056062] [2021-06-12 19:30:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000056062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862085421] [2021-06-12 19:30:54,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:54,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:54,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:54,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862085421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:54,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:54,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 25 [2021-06-12 19:30:54,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881799383] [2021-06-12 19:30:54,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:54,564 INFO L87 Difference]: Start difference. First operand 30042 states and 95572 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:56,420 INFO L93 Difference]: Finished difference Result 32560 states and 101433 transitions. [2021-06-12 19:30:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-12 19:30:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:56,469 INFO L225 Difference]: With dead ends: 32560 [2021-06-12 19:30:56,470 INFO L226 Difference]: Without dead ends: 32554 [2021-06-12 19:30:56,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6452 ImplicationChecksByTransitivity, 1596.7ms TimeCoverageRelationStatistics Valid=5189, Invalid=13171, Unknown=0, NotChecked=0, Total=18360 [2021-06-12 19:30:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32554 states. [2021-06-12 19:30:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32554 to 29608. [2021-06-12 19:30:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29608 states, 29607 states have (on average 3.1779646705171074) internal successors, (94090), 29607 states have internal predecessors, (94090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29608 states to 29608 states and 94090 transitions. [2021-06-12 19:30:57,059 INFO L78 Accepts]: Start accepts. Automaton has 29608 states and 94090 transitions. Word has length 26 [2021-06-12 19:30:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:57,059 INFO L482 AbstractCegarLoop]: Abstraction has 29608 states and 94090 transitions. [2021-06-12 19:30:57,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29608 states and 94090 transitions. [2021-06-12 19:30:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:30:57,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:57,097 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:57,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-12 19:30:57,297 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:57,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1910739347, now seen corresponding path program 539 times [2021-06-12 19:30:57,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:57,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275648033] [2021-06-12 19:30:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:57,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:57,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275648033] [2021-06-12 19:30:57,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275648033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:57,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187954763] [2021-06-12 19:30:57,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:57,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:30:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:30:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187954763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:57,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:57,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 26 [2021-06-12 19:30:57,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153246417] [2021-06-12 19:30:57,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:30:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:30:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:30:57,555 INFO L87 Difference]: Start difference. First operand 29608 states and 94090 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:59,402 INFO L93 Difference]: Finished difference Result 32780 states and 102273 transitions. [2021-06-12 19:30:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-12 19:30:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:30:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:59,453 INFO L225 Difference]: With dead ends: 32780 [2021-06-12 19:30:59,453 INFO L226 Difference]: Without dead ends: 32772 [2021-06-12 19:30:59,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5696 ImplicationChecksByTransitivity, 1557.7ms TimeCoverageRelationStatistics Valid=4538, Invalid=11974, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 19:30:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32772 states. [2021-06-12 19:31:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32772 to 29830. [2021-06-12 19:31:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29830 states, 29829 states have (on average 3.1797244292467064) internal successors, (94848), 29829 states have internal predecessors, (94848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29830 states to 29830 states and 94848 transitions. [2021-06-12 19:31:00,113 INFO L78 Accepts]: Start accepts. Automaton has 29830 states and 94848 transitions. Word has length 26 [2021-06-12 19:31:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:00,113 INFO L482 AbstractCegarLoop]: Abstraction has 29830 states and 94848 transitions. [2021-06-12 19:31:00,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29830 states and 94848 transitions. [2021-06-12 19:31:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:00,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:00,151 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:00,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-06-12 19:31:00,351 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 869163279, now seen corresponding path program 540 times [2021-06-12 19:31:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:00,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937962949] [2021-06-12 19:31:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:00,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937962949] [2021-06-12 19:31:00,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937962949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:00,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488774566] [2021-06-12 19:31:00,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:00,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:31:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488774566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:00,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:00,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-12 19:31:00,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134003404] [2021-06-12 19:31:00,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:31:00,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:00,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:31:00,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:31:00,613 INFO L87 Difference]: Start difference. First operand 29830 states and 94848 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:02,195 INFO L93 Difference]: Finished difference Result 33134 states and 103498 transitions. [2021-06-12 19:31:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-12 19:31:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:02,250 INFO L225 Difference]: With dead ends: 33134 [2021-06-12 19:31:02,251 INFO L226 Difference]: Without dead ends: 33122 [2021-06-12 19:31:02,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5101 ImplicationChecksByTransitivity, 1383.1ms TimeCoverageRelationStatistics Valid=4017, Invalid=10989, Unknown=0, NotChecked=0, Total=15006 [2021-06-12 19:31:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33122 states. [2021-06-12 19:31:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33122 to 30107. [2021-06-12 19:31:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30107 states, 30106 states have (on average 3.1811931176509667) internal successors, (95773), 30106 states have internal predecessors, (95773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30107 states to 30107 states and 95773 transitions. [2021-06-12 19:31:02,903 INFO L78 Accepts]: Start accepts. Automaton has 30107 states and 95773 transitions. Word has length 26 [2021-06-12 19:31:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:02,903 INFO L482 AbstractCegarLoop]: Abstraction has 30107 states and 95773 transitions. [2021-06-12 19:31:02,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 30107 states and 95773 transitions. [2021-06-12 19:31:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:02,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:02,945 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:03,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:03,146 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:03,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1354923757, now seen corresponding path program 541 times [2021-06-12 19:31:03,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:03,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597164920] [2021-06-12 19:31:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:03,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:03,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597164920] [2021-06-12 19:31:03,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597164920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:03,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213426556] [2021-06-12 19:31:03,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:03,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213426556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:03,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:03,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-12 19:31:03,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267548040] [2021-06-12 19:31:03,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 19:31:03,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:03,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 19:31:03,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:31:03,426 INFO L87 Difference]: Start difference. First operand 30107 states and 95773 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:05,072 INFO L93 Difference]: Finished difference Result 33604 states and 105046 transitions. [2021-06-12 19:31:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-12 19:31:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:05,125 INFO L225 Difference]: With dead ends: 33604 [2021-06-12 19:31:05,126 INFO L226 Difference]: Without dead ends: 33588 [2021-06-12 19:31:05,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 1448.1ms TimeCoverageRelationStatistics Valid=3628, Invalid=10178, Unknown=0, NotChecked=0, Total=13806 [2021-06-12 19:31:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33588 states. [2021-06-12 19:31:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33588 to 30921. [2021-06-12 19:31:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30921 states, 30920 states have (on average 3.184411384217335) internal successors, (98462), 30920 states have internal predecessors, (98462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30921 states to 30921 states and 98462 transitions. [2021-06-12 19:31:05,802 INFO L78 Accepts]: Start accepts. Automaton has 30921 states and 98462 transitions. Word has length 26 [2021-06-12 19:31:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:05,802 INFO L482 AbstractCegarLoop]: Abstraction has 30921 states and 98462 transitions. [2021-06-12 19:31:05,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30921 states and 98462 transitions. [2021-06-12 19:31:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:05,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:05,843 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:06,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-06-12 19:31:06,043 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1582145137, now seen corresponding path program 542 times [2021-06-12 19:31:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768518555] [2021-06-12 19:31:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:06,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768518555] [2021-06-12 19:31:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768518555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201476415] [2021-06-12 19:31:06,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:06,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:31:06,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:06,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201476415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:06,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:06,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-12 19:31:06,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979282207] [2021-06-12 19:31:06,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:31:06,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:06,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:31:06,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:31:06,374 INFO L87 Difference]: Start difference. First operand 30921 states and 98462 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:07,885 INFO L93 Difference]: Finished difference Result 34622 states and 108395 transitions. [2021-06-12 19:31:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-12 19:31:07,886 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:07,942 INFO L225 Difference]: With dead ends: 34622 [2021-06-12 19:31:07,942 INFO L226 Difference]: Without dead ends: 34602 [2021-06-12 19:31:07,943 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4330 ImplicationChecksByTransitivity, 1352.1ms TimeCoverageRelationStatistics Valid=3372, Invalid=9510, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 19:31:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34602 states. [2021-06-12 19:31:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34602 to 31830. [2021-06-12 19:31:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31830 states, 31829 states have (on average 3.1889157686386627) internal successors, (101500), 31829 states have internal predecessors, (101500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31830 states to 31830 states and 101500 transitions. [2021-06-12 19:31:08,613 INFO L78 Accepts]: Start accepts. Automaton has 31830 states and 101500 transitions. Word has length 26 [2021-06-12 19:31:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:08,613 INFO L482 AbstractCegarLoop]: Abstraction has 31830 states and 101500 transitions. [2021-06-12 19:31:08,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 31830 states and 101500 transitions. [2021-06-12 19:31:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:08,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:08,654 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:08,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-12 19:31:08,854 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash -36073325, now seen corresponding path program 543 times [2021-06-12 19:31:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:08,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382630805] [2021-06-12 19:31:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:08,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:08,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382630805] [2021-06-12 19:31:08,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382630805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:08,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442416599] [2021-06-12 19:31:08,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:08,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:31:08,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:09,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442416599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:09,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:09,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-12 19:31:09,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444255963] [2021-06-12 19:31:09,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 19:31:09,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:09,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 19:31:09,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:31:09,166 INFO L87 Difference]: Start difference. First operand 31830 states and 101500 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:09,825 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 19:31:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:10,572 INFO L93 Difference]: Finished difference Result 34324 states and 107694 transitions. [2021-06-12 19:31:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 19:31:10,573 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:10,626 INFO L225 Difference]: With dead ends: 34324 [2021-06-12 19:31:10,626 INFO L226 Difference]: Without dead ends: 34300 [2021-06-12 19:31:10,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 1294.2ms TimeCoverageRelationStatistics Valid=3249, Invalid=8961, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 19:31:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34300 states. [2021-06-12 19:31:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34300 to 31889. [2021-06-12 19:31:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31889 states, 31888 states have (on average 3.188817109884596) internal successors, (101685), 31888 states have internal predecessors, (101685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31889 states to 31889 states and 101685 transitions. [2021-06-12 19:31:11,333 INFO L78 Accepts]: Start accepts. Automaton has 31889 states and 101685 transitions. Word has length 26 [2021-06-12 19:31:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:11,333 INFO L482 AbstractCegarLoop]: Abstraction has 31889 states and 101685 transitions. [2021-06-12 19:31:11,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31889 states and 101685 transitions. [2021-06-12 19:31:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:11,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:11,375 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:11,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:11,575 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:11,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1315246283, now seen corresponding path program 544 times [2021-06-12 19:31:11,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:11,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122768104] [2021-06-12 19:31:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:11,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:11,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122768104] [2021-06-12 19:31:11,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122768104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:11,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820786105] [2021-06-12 19:31:11,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:11,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:31:11,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:11,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820786105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:11,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:11,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-12 19:31:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698935647] [2021-06-12 19:31:11,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:11,816 INFO L87 Difference]: Start difference. First operand 31889 states and 101685 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:13,079 INFO L93 Difference]: Finished difference Result 42994 states and 135578 transitions. [2021-06-12 19:31:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 19:31:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:13,150 INFO L225 Difference]: With dead ends: 42994 [2021-06-12 19:31:13,150 INFO L226 Difference]: Without dead ends: 42979 [2021-06-12 19:31:13,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 972.3ms TimeCoverageRelationStatistics Valid=2766, Invalid=5424, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 19:31:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42979 states. [2021-06-12 19:31:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42979 to 37887. [2021-06-12 19:31:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37887 states, 37886 states have (on average 3.2266800401203612) internal successors, (122246), 37886 states have internal predecessors, (122246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37887 states to 37887 states and 122246 transitions. [2021-06-12 19:31:14,076 INFO L78 Accepts]: Start accepts. Automaton has 37887 states and 122246 transitions. Word has length 26 [2021-06-12 19:31:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:14,076 INFO L482 AbstractCegarLoop]: Abstraction has 37887 states and 122246 transitions. [2021-06-12 19:31:14,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 37887 states and 122246 transitions. [2021-06-12 19:31:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:14,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:14,122 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:14,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-06-12 19:31:14,323 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 850655179, now seen corresponding path program 545 times [2021-06-12 19:31:14,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:14,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372944683] [2021-06-12 19:31:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:14,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:14,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372944683] [2021-06-12 19:31:14,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372944683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:14,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250946973] [2021-06-12 19:31:14,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:14,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:31:14,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:14,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250946973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:14,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:14,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2021-06-12 19:31:14,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152988250] [2021-06-12 19:31:14,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:14,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:14,567 INFO L87 Difference]: Start difference. First operand 37887 states and 122246 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:15,643 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2021-06-12 19:31:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:16,910 INFO L93 Difference]: Finished difference Result 41043 states and 129835 transitions. [2021-06-12 19:31:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-12 19:31:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:16,976 INFO L225 Difference]: With dead ends: 41043 [2021-06-12 19:31:16,976 INFO L226 Difference]: Without dead ends: 41039 [2021-06-12 19:31:16,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9041 ImplicationChecksByTransitivity, 1919.9ms TimeCoverageRelationStatistics Valid=5710, Invalid=15752, Unknown=0, NotChecked=0, Total=21462 [2021-06-12 19:31:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41039 states. [2021-06-12 19:31:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41039 to 37190. [2021-06-12 19:31:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37190 states, 37189 states have (on average 3.2220817983812418) internal successors, (119826), 37189 states have internal predecessors, (119826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37190 states to 37190 states and 119826 transitions. [2021-06-12 19:31:17,690 INFO L78 Accepts]: Start accepts. Automaton has 37190 states and 119826 transitions. Word has length 26 [2021-06-12 19:31:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:17,690 INFO L482 AbstractCegarLoop]: Abstraction has 37190 states and 119826 transitions. [2021-06-12 19:31:17,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37190 states and 119826 transitions. [2021-06-12 19:31:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:17,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:17,911 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:18,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:18,125 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash 817055951, now seen corresponding path program 546 times [2021-06-12 19:31:18,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:18,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220835915] [2021-06-12 19:31:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:18,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:18,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220835915] [2021-06-12 19:31:18,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220835915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:18,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479405206] [2021-06-12 19:31:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:18,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:31:18,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:18,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:18,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:18,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479405206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:18,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:18,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-06-12 19:31:18,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712552260] [2021-06-12 19:31:18,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:31:18,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:18,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:31:18,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:31:18,378 INFO L87 Difference]: Start difference. First operand 37190 states and 119826 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:19,144 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2021-06-12 19:31:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:20,447 INFO L93 Difference]: Finished difference Result 41476 states and 131495 transitions. [2021-06-12 19:31:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-12 19:31:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:20,517 INFO L225 Difference]: With dead ends: 41476 [2021-06-12 19:31:20,517 INFO L226 Difference]: Without dead ends: 41468 [2021-06-12 19:31:20,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7764 ImplicationChecksByTransitivity, 1772.8ms TimeCoverageRelationStatistics Valid=4932, Invalid=13974, Unknown=0, NotChecked=0, Total=18906 [2021-06-12 19:31:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41468 states. [2021-06-12 19:31:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41468 to 37586. [2021-06-12 19:31:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37586 states, 37585 states have (on average 3.2260476253824666) internal successors, (121251), 37585 states have internal predecessors, (121251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37586 states to 37586 states and 121251 transitions. [2021-06-12 19:31:21,343 INFO L78 Accepts]: Start accepts. Automaton has 37586 states and 121251 transitions. Word has length 26 [2021-06-12 19:31:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:21,343 INFO L482 AbstractCegarLoop]: Abstraction has 37586 states and 121251 transitions. [2021-06-12 19:31:21,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 37586 states and 121251 transitions. [2021-06-12 19:31:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:21,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:21,390 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:21,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-12 19:31:21,590 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash -224520117, now seen corresponding path program 547 times [2021-06-12 19:31:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:21,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092554520] [2021-06-12 19:31:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:21,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:21,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092554520] [2021-06-12 19:31:21,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092554520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:21,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610242858] [2021-06-12 19:31:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:21,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610242858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:21,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:21,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-06-12 19:31:21,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131849540] [2021-06-12 19:31:21,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:31:21,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:31:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:31:21,851 INFO L87 Difference]: Start difference. First operand 37586 states and 121251 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:23,835 INFO L93 Difference]: Finished difference Result 42209 states and 134096 transitions. [2021-06-12 19:31:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-12 19:31:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:23,902 INFO L225 Difference]: With dead ends: 42209 [2021-06-12 19:31:23,903 INFO L226 Difference]: Without dead ends: 42197 [2021-06-12 19:31:23,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6687 ImplicationChecksByTransitivity, 1530.1ms TimeCoverageRelationStatistics Valid=4267, Invalid=12503, Unknown=0, NotChecked=0, Total=16770 [2021-06-12 19:31:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42197 states. [2021-06-12 19:31:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42197 to 38325. [2021-06-12 19:31:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38325 states, 38324 states have (on average 3.2297515916918904) internal successors, (123777), 38324 states have internal predecessors, (123777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38325 states to 38325 states and 123777 transitions. [2021-06-12 19:31:24,630 INFO L78 Accepts]: Start accepts. Automaton has 38325 states and 123777 transitions. Word has length 26 [2021-06-12 19:31:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:24,630 INFO L482 AbstractCegarLoop]: Abstraction has 38325 states and 123777 transitions. [2021-06-12 19:31:24,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 38325 states and 123777 transitions. [2021-06-12 19:31:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:24,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:24,676 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:24,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable992 [2021-06-12 19:31:24,876 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1846360143, now seen corresponding path program 548 times [2021-06-12 19:31:24,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:24,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559490012] [2021-06-12 19:31:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:24,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559490012] [2021-06-12 19:31:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559490012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153626448] [2021-06-12 19:31:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:24,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:31:24,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:25,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153626448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:25,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:25,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-12 19:31:25,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194783057] [2021-06-12 19:31:25,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 19:31:25,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 19:31:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:31:25,347 INFO L87 Difference]: Start difference. First operand 38325 states and 123777 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:27,081 INFO L93 Difference]: Finished difference Result 43278 states and 137750 transitions. [2021-06-12 19:31:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-12 19:31:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:27,157 INFO L225 Difference]: With dead ends: 43278 [2021-06-12 19:31:27,157 INFO L226 Difference]: Without dead ends: 43262 [2021-06-12 19:31:27,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5785 ImplicationChecksByTransitivity, 1679.8ms TimeCoverageRelationStatistics Valid=3724, Invalid=11282, Unknown=0, NotChecked=0, Total=15006 [2021-06-12 19:31:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43262 states. [2021-06-12 19:31:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43262 to 39413. [2021-06-12 19:31:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39413 states, 39412 states have (on average 3.2331269664061706) internal successors, (127424), 39412 states have internal predecessors, (127424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39413 states to 39413 states and 127424 transitions. [2021-06-12 19:31:27,984 INFO L78 Accepts]: Start accepts. Automaton has 39413 states and 127424 transitions. Word has length 26 [2021-06-12 19:31:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:27,984 INFO L482 AbstractCegarLoop]: Abstraction has 39413 states and 127424 transitions. [2021-06-12 19:31:27,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 39413 states and 127424 transitions. [2021-06-12 19:31:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:28,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:28,035 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:28,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-12 19:31:28,235 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1619138763, now seen corresponding path program 549 times [2021-06-12 19:31:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:28,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907316704] [2021-06-12 19:31:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:28,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:28,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907316704] [2021-06-12 19:31:28,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907316704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:28,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88449214] [2021-06-12 19:31:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:28,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:31:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:28,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:28,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88449214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:28,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:28,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-06-12 19:31:28,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736911298] [2021-06-12 19:31:28,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:31:28,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:28,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:31:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:31:28,531 INFO L87 Difference]: Start difference. First operand 39413 states and 127424 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:30,283 INFO L93 Difference]: Finished difference Result 44769 states and 142689 transitions. [2021-06-12 19:31:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-12 19:31:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:30,357 INFO L225 Difference]: With dead ends: 44769 [2021-06-12 19:31:30,357 INFO L226 Difference]: Without dead ends: 44749 [2021-06-12 19:31:30,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5055 ImplicationChecksByTransitivity, 1407.9ms TimeCoverageRelationStatistics Valid=3311, Invalid=10261, Unknown=0, NotChecked=0, Total=13572 [2021-06-12 19:31:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44749 states. [2021-06-12 19:31:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44749 to 41645. [2021-06-12 19:31:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41645 states, 41644 states have (on average 3.238041494573048) internal successors, (134845), 41644 states have internal predecessors, (134845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41645 states to 41645 states and 134845 transitions. [2021-06-12 19:31:31,185 INFO L78 Accepts]: Start accepts. Automaton has 41645 states and 134845 transitions. Word has length 26 [2021-06-12 19:31:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:31,186 INFO L482 AbstractCegarLoop]: Abstraction has 41645 states and 134845 transitions. [2021-06-12 19:31:31,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 41645 states and 134845 transitions. [2021-06-12 19:31:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:31,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:31,236 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:31,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-12 19:31:31,437 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:31,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1129756721, now seen corresponding path program 550 times [2021-06-12 19:31:31,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:31,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208909830] [2021-06-12 19:31:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:31,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208909830] [2021-06-12 19:31:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208909830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798673557] [2021-06-12 19:31:31,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:31,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:31:31,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:31,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:31,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798673557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:31,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:31,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 19:31:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277842606] [2021-06-12 19:31:31,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 19:31:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 19:31:31,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:31:31,747 INFO L87 Difference]: Start difference. First operand 41645 states and 134845 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:33,467 INFO L93 Difference]: Finished difference Result 47008 states and 150165 transitions. [2021-06-12 19:31:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-12 19:31:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:33,545 INFO L225 Difference]: With dead ends: 47008 [2021-06-12 19:31:33,545 INFO L226 Difference]: Without dead ends: 46984 [2021-06-12 19:31:33,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4499 ImplicationChecksByTransitivity, 1291.9ms TimeCoverageRelationStatistics Valid=3035, Invalid=9397, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 19:31:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46984 states. [2021-06-12 19:31:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46984 to 43802. [2021-06-12 19:31:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43802 states, 43801 states have (on average 3.243510422136481) internal successors, (142069), 43801 states have internal predecessors, (142069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43802 states to 43802 states and 142069 transitions. [2021-06-12 19:31:34,508 INFO L78 Accepts]: Start accepts. Automaton has 43802 states and 142069 transitions. Word has length 26 [2021-06-12 19:31:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:34,508 INFO L482 AbstractCegarLoop]: Abstraction has 43802 states and 142069 transitions. [2021-06-12 19:31:34,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 43802 states and 142069 transitions. [2021-06-12 19:31:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:34,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:34,573 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:34,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable995 [2021-06-12 19:31:34,774 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -446170805, now seen corresponding path program 551 times [2021-06-12 19:31:34,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:34,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031658271] [2021-06-12 19:31:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:34,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031658271] [2021-06-12 19:31:34,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031658271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094578532] [2021-06-12 19:31:34,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:34,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:31:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:35,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094578532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:35,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:35,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 19:31:35,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649729023] [2021-06-12 19:31:35,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 19:31:35,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 19:31:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:31:35,105 INFO L87 Difference]: Start difference. First operand 43802 states and 142069 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:36,501 INFO L93 Difference]: Finished difference Result 46885 states and 150062 transitions. [2021-06-12 19:31:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 19:31:36,502 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:36,582 INFO L225 Difference]: With dead ends: 46885 [2021-06-12 19:31:36,583 INFO L226 Difference]: Without dead ends: 46857 [2021-06-12 19:31:36,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 1244.4ms TimeCoverageRelationStatistics Valid=2902, Invalid=8654, Unknown=0, NotChecked=0, Total=11556 [2021-06-12 19:31:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46857 states. [2021-06-12 19:31:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46857 to 43877. [2021-06-12 19:31:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43877 states, 43876 states have (on average 3.243390464035008) internal successors, (142307), 43876 states have internal predecessors, (142307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43877 states to 43877 states and 142307 transitions. [2021-06-12 19:31:37,575 INFO L78 Accepts]: Start accepts. Automaton has 43877 states and 142307 transitions. Word has length 26 [2021-06-12 19:31:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:37,575 INFO L482 AbstractCegarLoop]: Abstraction has 43877 states and 142307 transitions. [2021-06-12 19:31:37,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 43877 states and 142307 transitions. [2021-06-12 19:31:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:37,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:37,629 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:37,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable996,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:37,829 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash -796911989, now seen corresponding path program 552 times [2021-06-12 19:31:37,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:37,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540129138] [2021-06-12 19:31:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:37,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:37,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540129138] [2021-06-12 19:31:37,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540129138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:37,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113423368] [2021-06-12 19:31:37,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:38,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:31:38,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:38,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113423368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:38,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:38,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-12 19:31:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658323085] [2021-06-12 19:31:38,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:31:38,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:31:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:31:38,229 INFO L87 Difference]: Start difference. First operand 43877 states and 142307 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:38,542 INFO L93 Difference]: Finished difference Result 49441 states and 158707 transitions. [2021-06-12 19:31:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:31:38,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:38,634 INFO L225 Difference]: With dead ends: 49441 [2021-06-12 19:31:38,634 INFO L226 Difference]: Without dead ends: 49441 [2021-06-12 19:31:38,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:31:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49441 states. [2021-06-12 19:31:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49441 to 44031. [2021-06-12 19:31:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44031 states, 44030 states have (on average 3.2426073131955486) internal successors, (142772), 44030 states have internal predecessors, (142772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 142772 transitions. [2021-06-12 19:31:39,736 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 142772 transitions. Word has length 26 [2021-06-12 19:31:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:39,736 INFO L482 AbstractCegarLoop]: Abstraction has 44031 states and 142772 transitions. [2021-06-12 19:31:39,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 142772 transitions. [2021-06-12 19:31:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:39,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:39,792 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:39,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-12 19:31:39,993 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1573297961, now seen corresponding path program 553 times [2021-06-12 19:31:39,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:39,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607204662] [2021-06-12 19:31:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:40,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:40,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607204662] [2021-06-12 19:31:40,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607204662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:40,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446235602] [2021-06-12 19:31:40,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:40,279 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 19:31:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:40,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446235602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:40,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:40,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:40,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522725926] [2021-06-12 19:31:40,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:40,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:40,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:40,405 INFO L87 Difference]: Start difference. First operand 44031 states and 142772 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:40,849 INFO L93 Difference]: Finished difference Result 46562 states and 149936 transitions. [2021-06-12 19:31:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:31:40,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:40,930 INFO L225 Difference]: With dead ends: 46562 [2021-06-12 19:31:40,930 INFO L226 Difference]: Without dead ends: 46562 [2021-06-12 19:31:40,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:31:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46562 states. [2021-06-12 19:31:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46562 to 44113. [2021-06-12 19:31:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44113 states, 44112 states have (on average 3.2421563293434894) internal successors, (143018), 44112 states have internal predecessors, (143018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44113 states to 44113 states and 143018 transitions. [2021-06-12 19:31:42,023 INFO L78 Accepts]: Start accepts. Automaton has 44113 states and 143018 transitions. Word has length 26 [2021-06-12 19:31:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:42,023 INFO L482 AbstractCegarLoop]: Abstraction has 44113 states and 143018 transitions. [2021-06-12 19:31:42,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 44113 states and 143018 transitions. [2021-06-12 19:31:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:42,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:42,103 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:42,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:42,317 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1035805105, now seen corresponding path program 554 times [2021-06-12 19:31:42,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:42,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471346493] [2021-06-12 19:31:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:42,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:42,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471346493] [2021-06-12 19:31:42,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471346493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:42,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215027092] [2021-06-12 19:31:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:42,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:31:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:42,609 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:31:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:42,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215027092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:42,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:42,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:42,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923515591] [2021-06-12 19:31:42,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:42,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:42,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:42,743 INFO L87 Difference]: Start difference. First operand 44113 states and 143018 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:43,522 INFO L93 Difference]: Finished difference Result 48235 states and 154817 transitions. [2021-06-12 19:31:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:31:43,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:43,609 INFO L225 Difference]: With dead ends: 48235 [2021-06-12 19:31:43,609 INFO L226 Difference]: Without dead ends: 48235 [2021-06-12 19:31:43,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=2068, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:31:43,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48235 states. [2021-06-12 19:31:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48235 to 44213. [2021-06-12 19:31:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44213 states, 44212 states have (on average 3.241608613046232) internal successors, (143318), 44212 states have internal predecessors, (143318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44213 states to 44213 states and 143318 transitions. [2021-06-12 19:31:44,541 INFO L78 Accepts]: Start accepts. Automaton has 44213 states and 143318 transitions. Word has length 26 [2021-06-12 19:31:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:44,541 INFO L482 AbstractCegarLoop]: Abstraction has 44213 states and 143318 transitions. [2021-06-12 19:31:44,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 44213 states and 143318 transitions. [2021-06-12 19:31:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:44,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:44,767 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:44,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:44,968 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash -187182633, now seen corresponding path program 555 times [2021-06-12 19:31:44,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:44,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026978484] [2021-06-12 19:31:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:45,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:45,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026978484] [2021-06-12 19:31:45,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026978484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:45,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709718929] [2021-06-12 19:31:45,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:45,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:31:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709718929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:45,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:45,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:45,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969287456] [2021-06-12 19:31:45,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:45,208 INFO L87 Difference]: Start difference. First operand 44213 states and 143318 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:46,312 INFO L93 Difference]: Finished difference Result 48961 states and 156816 transitions. [2021-06-12 19:31:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 19:31:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:46,404 INFO L225 Difference]: With dead ends: 48961 [2021-06-12 19:31:46,405 INFO L226 Difference]: Without dead ends: 48961 [2021-06-12 19:31:46,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 687.6ms TimeCoverageRelationStatistics Valid=1750, Invalid=3506, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 19:31:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48961 states. [2021-06-12 19:31:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48961 to 44558. [2021-06-12 19:31:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44558 states, 44557 states have (on average 3.239737863859775) internal successors, (144353), 44557 states have internal predecessors, (144353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44558 states to 44558 states and 144353 transitions. [2021-06-12 19:31:47,395 INFO L78 Accepts]: Start accepts. Automaton has 44558 states and 144353 transitions. Word has length 26 [2021-06-12 19:31:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:47,395 INFO L482 AbstractCegarLoop]: Abstraction has 44558 states and 144353 transitions. [2021-06-12 19:31:47,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 44558 states and 144353 transitions. [2021-06-12 19:31:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:47,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:47,448 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:47,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-12 19:31:47,649 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1502760271, now seen corresponding path program 556 times [2021-06-12 19:31:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:47,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916881816] [2021-06-12 19:31:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:47,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:47,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916881816] [2021-06-12 19:31:47,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916881816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:47,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988756821] [2021-06-12 19:31:47,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:47,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:31:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988756821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:47,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:47,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975189600] [2021-06-12 19:31:47,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:47,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:47,888 INFO L87 Difference]: Start difference. First operand 44558 states and 144353 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:49,255 INFO L93 Difference]: Finished difference Result 49314 states and 157697 transitions. [2021-06-12 19:31:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 19:31:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:49,346 INFO L225 Difference]: With dead ends: 49314 [2021-06-12 19:31:49,346 INFO L226 Difference]: Without dead ends: 49314 [2021-06-12 19:31:49,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=2647, Invalid=5363, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 19:31:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49314 states. [2021-06-12 19:31:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49314 to 44956. [2021-06-12 19:31:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44956 states, 44955 states have (on average 3.237548659770882) internal successors, (145544), 44955 states have internal predecessors, (145544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44956 states to 44956 states and 145544 transitions. [2021-06-12 19:31:50,355 INFO L78 Accepts]: Start accepts. Automaton has 44956 states and 145544 transitions. Word has length 26 [2021-06-12 19:31:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:50,355 INFO L482 AbstractCegarLoop]: Abstraction has 44956 states and 145544 transitions. [2021-06-12 19:31:50,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 44956 states and 145544 transitions. [2021-06-12 19:31:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:50,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:50,419 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:50,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-12 19:31:50,629 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1906408745, now seen corresponding path program 557 times [2021-06-12 19:31:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:50,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960344726] [2021-06-12 19:31:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:50,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:50,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960344726] [2021-06-12 19:31:50,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960344726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474704104] [2021-06-12 19:31:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:50,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:31:50,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:50,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:50,987 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:31:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:51,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474704104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:51,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:51,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:51,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131562213] [2021-06-12 19:31:51,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:51,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:51,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:51,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:51,077 INFO L87 Difference]: Start difference. First operand 44956 states and 145544 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:52,713 INFO L93 Difference]: Finished difference Result 49524 states and 158196 transitions. [2021-06-12 19:31:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 19:31:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:52,803 INFO L225 Difference]: With dead ends: 49524 [2021-06-12 19:31:52,803 INFO L226 Difference]: Without dead ends: 49524 [2021-06-12 19:31:52,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 1452.3ms TimeCoverageRelationStatistics Valid=3467, Invalid=7039, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 19:31:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49524 states. [2021-06-12 19:31:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49524 to 45272. [2021-06-12 19:31:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45272 states, 45271 states have (on average 3.2359788827284577) internal successors, (146496), 45271 states have internal predecessors, (146496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45272 states to 45272 states and 146496 transitions. [2021-06-12 19:31:53,760 INFO L78 Accepts]: Start accepts. Automaton has 45272 states and 146496 transitions. Word has length 26 [2021-06-12 19:31:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:53,760 INFO L482 AbstractCegarLoop]: Abstraction has 45272 states and 146496 transitions. [2021-06-12 19:31:53,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 45272 states and 146496 transitions. [2021-06-12 19:31:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:53,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:53,813 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:54,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-12 19:31:54,014 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash 200375375, now seen corresponding path program 558 times [2021-06-12 19:31:54,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:54,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351627708] [2021-06-12 19:31:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:54,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:54,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351627708] [2021-06-12 19:31:54,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351627708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:54,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498559315] [2021-06-12 19:31:54,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:54,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:31:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:54,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:54,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498559315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:54,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:54,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:54,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014634905] [2021-06-12 19:31:54,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:54,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:54,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:54,266 INFO L87 Difference]: Start difference. First operand 45272 states and 146496 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:56,091 INFO L93 Difference]: Finished difference Result 49619 states and 158430 transitions. [2021-06-12 19:31:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 19:31:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:56,171 INFO L225 Difference]: With dead ends: 49619 [2021-06-12 19:31:56,171 INFO L226 Difference]: Without dead ends: 49619 [2021-06-12 19:31:56,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1329.2ms TimeCoverageRelationStatistics Valid=3733, Invalid=7397, Unknown=0, NotChecked=0, Total=11130 [2021-06-12 19:31:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49619 states. [2021-06-12 19:31:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49619 to 45591. [2021-06-12 19:31:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45591 states, 45590 states have (on average 3.234722526869928) internal successors, (147471), 45590 states have internal predecessors, (147471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45591 states to 45591 states and 147471 transitions. [2021-06-12 19:31:57,204 INFO L78 Accepts]: Start accepts. Automaton has 45591 states and 147471 transitions. Word has length 26 [2021-06-12 19:31:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:57,204 INFO L482 AbstractCegarLoop]: Abstraction has 45591 states and 147471 transitions. [2021-06-12 19:31:57,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 45591 states and 147471 transitions. [2021-06-12 19:31:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:31:57,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:57,277 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:57,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-06-12 19:31:57,477 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1948421161, now seen corresponding path program 559 times [2021-06-12 19:31:57,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:57,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856816290] [2021-06-12 19:31:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:57,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:57,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856816290] [2021-06-12 19:31:57,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856816290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:57,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681031418] [2021-06-12 19:31:57,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:31:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:31:57,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681031418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:57,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:57,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:31:57,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681994486] [2021-06-12 19:31:57,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:31:57,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:31:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:31:57,725 INFO L87 Difference]: Start difference. First operand 45591 states and 147471 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:31:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:59,302 INFO L93 Difference]: Finished difference Result 50206 states and 160535 transitions. [2021-06-12 19:31:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 19:31:59,302 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 19:31:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:59,394 INFO L225 Difference]: With dead ends: 50206 [2021-06-12 19:31:59,394 INFO L226 Difference]: Without dead ends: 50206 [2021-06-12 19:31:59,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 1227.3ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 19:31:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50206 states.