/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/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:13:23,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:13:23,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:13:23,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:13:23,217 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 [2021-07-13 20:13:23,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:13:23,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:13:23,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:13:23,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:13:23,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:13:23,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:13:23,260 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:13:23,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:13:23,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:13:23,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:13:23,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:13:23,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:13:23,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:13:23,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:13:23,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:13:23,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:13:23,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:13:23,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:13:23,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:13:23,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:13:23,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:13:23,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:13:23,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:13:23,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:13:23,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:13:23,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:13:23,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:13:23,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:13:23,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:13:23,279 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:13:23,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:13:23,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:13:23,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:13:23,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:13:23,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:13:23,646 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:13:23,650 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:13:23,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-07-13 20:13:23,651 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-07-13 20:13:23,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:13:23,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:13:23,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:13:23,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:13:23,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:13:23,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:13:23,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:13:23,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:13:23,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:13:23,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/1) ... [2021-07-13 20:13:23,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:13:23,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:13:23,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:13:23,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:13:23,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (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 [2021-07-13 20:13:23,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:13:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:13:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:13:23,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:13:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:13:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:13:23,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:13:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:13:23,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:13:23,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:13:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:13:23,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:13:23,843 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:13:24,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:13:24,083 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:13:24,085 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:13:24 BoogieIcfgContainer [2021-07-13 20:13:24,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:13:24,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:13:24,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:13:24,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:13:24,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:13:23" (1/2) ... [2021-07-13 20:13:24,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675e12fa and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:13:24, skipping insertion in model container [2021-07-13 20:13:24,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:13:24" (2/2) ... [2021-07-13 20:13:24,092 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-07-13 20:13:24,096 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:13:24,097 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:13:24,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:13:24,097 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:13:24,168 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:13:24,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:13:24,202 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:13:24,203 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:13:24,203 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:13:24,203 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:13:24,203 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:13:24,203 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:13:24,203 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:13:24,204 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:13:24,213 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-07-13 20:13:24,236 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 136 states, 135 states have (on average 2.7925925925925927) internal successors, (377), 135 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 135 states have (on average 2.7925925925925927) internal successors, (377), 135 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:13:24,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,248 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,249 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-07-13 20:13:24,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340243035] [2021-07-13 20:13:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:24,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:24,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340243035] [2021-07-13 20:13:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340243035] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:13:24,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:13:24,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:13:24,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966335715] [2021-07-13 20:13:24,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:13:24,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:13:24,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:13:24,441 INFO L87 Difference]: Start difference. First operand has 136 states, 135 states have (on average 2.7925925925925927) internal successors, (377), 135 states have internal predecessors, (377), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-07-13 20:13:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:24,522 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-07-13 20:13:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:13:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2021-07-13 20:13:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:24,540 INFO L225 Difference]: With dead ends: 186 [2021-07-13 20:13:24,541 INFO L226 Difference]: Without dead ends: 186 [2021-07-13 20:13:24,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:13:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-13 20:13:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-07-13 20:13:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 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) [2021-07-13 20:13:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-07-13 20:13:24,616 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-07-13 20:13:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:24,616 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-07-13 20:13:24,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-07-13 20:13:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-07-13 20:13:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:13:24,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,619 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:13:24,619 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -482972628, now seen corresponding path program 1 times [2021-07-13 20:13:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697575369] [2021-07-13 20:13:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:24,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697575369] [2021-07-13 20:13:24,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697575369] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:13:24,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:13:24,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:13:24,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490182801] [2021-07-13 20:13:24,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:13:24,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:13:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:13:24,688 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-07-13 20:13:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:24,727 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-07-13 20:13:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:13:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 23 [2021-07-13 20:13:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:24,730 INFO L225 Difference]: With dead ends: 151 [2021-07-13 20:13:24,730 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 20:13:24,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:13:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 20:13:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-07-13 20:13:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-07-13 20:13:24,750 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-07-13 20:13:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-07-13 20:13:24,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-07-13 20:13:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-07-13 20:13:24,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:13:24,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,756 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:13:24,757 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1326570477, now seen corresponding path program 1 times [2021-07-13 20:13:24,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197492652] [2021-07-13 20:13:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:24,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:24,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197492652] [2021-07-13 20:13:24,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197492652] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:13:24,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:13:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:13:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640620251] [2021-07-13 20:13:24,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:13:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:13:24,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:13:24,835 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-07-13 20:13:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:24,918 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-07-13 20:13:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:13:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 26 [2021-07-13 20:13:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:24,920 INFO L225 Difference]: With dead ends: 223 [2021-07-13 20:13:24,921 INFO L226 Difference]: Without dead ends: 223 [2021-07-13 20:13:24,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:13:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-13 20:13:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-07-13 20:13:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-07-13 20:13:24,938 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-07-13 20:13:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:24,938 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-07-13 20:13:24,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-07-13 20:13:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-07-13 20:13:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:13:24,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,940 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:13:24,940 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash 724535793, now seen corresponding path program 1 times [2021-07-13 20:13:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612168190] [2021-07-13 20:13:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:13:25,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:25,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612168190] [2021-07-13 20:13:25,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612168190] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:13:25,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:13:25,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:13:25,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692111374] [2021-07-13 20:13:25,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:13:25,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:13:25,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:13:25,011 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-07-13 20:13:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:25,056 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-07-13 20:13:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:13:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 28 [2021-07-13 20:13:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:25,060 INFO L225 Difference]: With dead ends: 344 [2021-07-13 20:13:25,060 INFO L226 Difference]: Without dead ends: 308 [2021-07-13 20:13:25,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:13:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-13 20:13:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-07-13 20:13:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-07-13 20:13:25,079 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-07-13 20:13:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:25,080 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-07-13 20:13:25,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-07-13 20:13:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-07-13 20:13:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:13:25,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:25,081 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:25,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:13:25,082 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -7298993, now seen corresponding path program 2 times [2021-07-13 20:13:25,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:25,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953914980] [2021-07-13 20:13:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:25,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:25,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953914980] [2021-07-13 20:13:25,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953914980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79307108] [2021-07-13 20:13:25,237 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 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 [2021-07-13 20:13:25,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:13:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79307108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:25,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:13:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047316624] [2021-07-13 20:13:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:13:25,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:13:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:13:25,526 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2021-07-13 20:13:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:26,204 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-07-13 20:13:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:13:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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 30 [2021-07-13 20:13:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:26,208 INFO L225 Difference]: With dead ends: 545 [2021-07-13 20:13:26,209 INFO L226 Difference]: Without dead ends: 545 [2021-07-13 20:13:26,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:13:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-13 20:13:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-07-13 20:13:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-07-13 20:13:26,227 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-07-13 20:13:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:26,227 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-07-13 20:13:26,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2021-07-13 20:13:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-07-13 20:13:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:13:26,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:26,230 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:26,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:26,445 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1439495847, now seen corresponding path program 3 times [2021-07-13 20:13:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:26,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430071194] [2021-07-13 20:13:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:26,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:26,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430071194] [2021-07-13 20:13:26,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430071194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643124249] [2021-07-13 20:13:26,549 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 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 [2021-07-13 20:13:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:13:26,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643124249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:26,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:26,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 20:13:26,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062354905] [2021-07-13 20:13:26,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:13:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:13:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:13:26,680 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-07-13 20:13:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:26,855 INFO L93 Difference]: Finished difference Result 582 states and 1706 transitions. [2021-07-13 20:13:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:13:26,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 30 [2021-07-13 20:13:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:26,865 INFO L225 Difference]: With dead ends: 582 [2021-07-13 20:13:26,865 INFO L226 Difference]: Without dead ends: 582 [2021-07-13 20:13:26,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:13:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-13 20:13:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 419. [2021-07-13 20:13:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0598086124401913) internal successors, (1279), 418 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1279 transitions. [2021-07-13 20:13:26,894 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1279 transitions. Word has length 30 [2021-07-13 20:13:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:26,895 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1279 transitions. [2021-07-13 20:13:26,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-07-13 20:13:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1279 transitions. [2021-07-13 20:13:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:13:26,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:26,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:27,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:13:27,113 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:27,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1671223453, now seen corresponding path program 4 times [2021-07-13 20:13:27,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:27,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261585413] [2021-07-13 20:13:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:27,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261585413] [2021-07-13 20:13:27,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261585413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:27,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767499066] [2021-07-13 20:13:27,190 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 [2021-07-13 20:13:27,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:27,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:13:27,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:27,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767499066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:27,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:27,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 20:13:27,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845743923] [2021-07-13 20:13:27,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:13:27,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:27,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:13:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:13:27,322 INFO L87 Difference]: Start difference. First operand 419 states and 1279 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-07-13 20:13:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:27,485 INFO L93 Difference]: Finished difference Result 881 states and 2675 transitions. [2021-07-13 20:13:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:13:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 30 [2021-07-13 20:13:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:27,491 INFO L225 Difference]: With dead ends: 881 [2021-07-13 20:13:27,491 INFO L226 Difference]: Without dead ends: 881 [2021-07-13 20:13:27,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:13:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-07-13 20:13:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 665. [2021-07-13 20:13:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.1490963855421685) internal successors, (2091), 664 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2091 transitions. [2021-07-13 20:13:27,519 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2091 transitions. Word has length 30 [2021-07-13 20:13:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:27,519 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 2091 transitions. [2021-07-13 20:13:27,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-07-13 20:13:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2091 transitions. [2021-07-13 20:13:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:13:27,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:27,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:27,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 20:13:27,733 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1167739173, now seen corresponding path program 5 times [2021-07-13 20:13:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314945465] [2021-07-13 20:13:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:27,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:27,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314945465] [2021-07-13 20:13:27,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314945465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:27,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992706878] [2021-07-13 20:13:27,821 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 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 [2021-07-13 20:13:27,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:27,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:13:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:28,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992706878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:28,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:28,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:13:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158912151] [2021-07-13 20:13:28,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:13:28,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:13:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:13:28,109 INFO L87 Difference]: Start difference. First operand 665 states and 2091 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:13:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:28,587 INFO L93 Difference]: Finished difference Result 1273 states and 3778 transitions. [2021-07-13 20:13:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:13:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 32 [2021-07-13 20:13:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:28,594 INFO L225 Difference]: With dead ends: 1273 [2021-07-13 20:13:28,595 INFO L226 Difference]: Without dead ends: 1273 [2021-07-13 20:13:28,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:13:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-07-13 20:13:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 665. [2021-07-13 20:13:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.1490963855421685) internal successors, (2091), 664 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2091 transitions. [2021-07-13 20:13:28,622 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2091 transitions. Word has length 32 [2021-07-13 20:13:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:28,622 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 2091 transitions. [2021-07-13 20:13:28,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-07-13 20:13:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2091 transitions. [2021-07-13 20:13:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:13:28,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:28,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:28,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:28,848 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1046658411, now seen corresponding path program 6 times [2021-07-13 20:13:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:28,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058627056] [2021-07-13 20:13:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:28,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:28,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058627056] [2021-07-13 20:13:28,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058627056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:28,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688898163] [2021-07-13 20:13:28,961 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 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 [2021-07-13 20:13:28,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:13:28,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:13:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:29,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688898163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:29,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:29,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 20:13:29,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054544189] [2021-07-13 20:13:29,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:13:29,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:13:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:13:29,074 INFO L87 Difference]: Start difference. First operand 665 states and 2091 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-13 20:13:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:29,474 INFO L93 Difference]: Finished difference Result 1216 states and 3756 transitions. [2021-07-13 20:13:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:13:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 32 [2021-07-13 20:13:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:29,482 INFO L225 Difference]: With dead ends: 1216 [2021-07-13 20:13:29,482 INFO L226 Difference]: Without dead ends: 1216 [2021-07-13 20:13:29,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:13:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-07-13 20:13:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 882. [2021-07-13 20:13:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.2701475595913734) internal successors, (2881), 881 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2881 transitions. [2021-07-13 20:13:29,514 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2881 transitions. Word has length 32 [2021-07-13 20:13:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:29,515 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2881 transitions. [2021-07-13 20:13:29,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-07-13 20:13:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2881 transitions. [2021-07-13 20:13:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:13:29,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:29,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:29,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:13:29,742 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1681550799, now seen corresponding path program 7 times [2021-07-13 20:13:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:29,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638759730] [2021-07-13 20:13:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:29,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638759730] [2021-07-13 20:13:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638759730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752281938] [2021-07-13 20:13:29,849 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 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 [2021-07-13 20:13:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:29,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:13:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:13:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752281938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:29,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:29,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 20:13:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269514054] [2021-07-13 20:13:29,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:13:29,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:13:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:13:29,969 INFO L87 Difference]: Start difference. First operand 882 states and 2881 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:13:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:30,069 INFO L93 Difference]: Finished difference Result 1358 states and 4416 transitions. [2021-07-13 20:13:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:13:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 32 [2021-07-13 20:13:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:30,076 INFO L225 Difference]: With dead ends: 1358 [2021-07-13 20:13:30,076 INFO L226 Difference]: Without dead ends: 1358 [2021-07-13 20:13:30,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:13:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-07-13 20:13:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 874. [2021-07-13 20:13:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.2829324169530354) internal successors, (2866), 873 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2866 transitions. [2021-07-13 20:13:30,109 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2866 transitions. Word has length 32 [2021-07-13 20:13:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:30,109 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2866 transitions. [2021-07-13 20:13:30,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-07-13 20:13:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2866 transitions. [2021-07-13 20:13:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:13:30,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:30,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:30,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:30,325 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash 612200489, now seen corresponding path program 8 times [2021-07-13 20:13:30,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:30,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855802639] [2021-07-13 20:13:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:30,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855802639] [2021-07-13 20:13:30,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855802639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087403966] [2021-07-13 20:13:30,419 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 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 [2021-07-13 20:13:30,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:30,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:13:30,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:30,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087403966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:30,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:30,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-13 20:13:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154000098] [2021-07-13 20:13:30,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:13:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:13:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:13:30,687 INFO L87 Difference]: Start difference. First operand 874 states and 2866 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-07-13 20:13:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:31,216 INFO L93 Difference]: Finished difference Result 1230 states and 3883 transitions. [2021-07-13 20:13:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:13:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 32 [2021-07-13 20:13:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:31,224 INFO L225 Difference]: With dead ends: 1230 [2021-07-13 20:13:31,224 INFO L226 Difference]: Without dead ends: 1230 [2021-07-13 20:13:31,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-13 20:13:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1030. [2021-07-13 20:13:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.251700680272109) internal successors, (3346), 1029 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3346 transitions. [2021-07-13 20:13:31,266 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3346 transitions. Word has length 32 [2021-07-13 20:13:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:31,266 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3346 transitions. [2021-07-13 20:13:31,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-07-13 20:13:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3346 transitions. [2021-07-13 20:13:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:13:31,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:31,270 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:31,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:31,485 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1903600235, now seen corresponding path program 9 times [2021-07-13 20:13:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:31,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413183458] [2021-07-13 20:13:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:31,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413183458] [2021-07-13 20:13:31,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413183458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482853646] [2021-07-13 20:13:31,599 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 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 [2021-07-13 20:13:31,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:13:31,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:31,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:13:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482853646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:31,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-07-13 20:13:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408063528] [2021-07-13 20:13:31,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:13:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:31,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:13:31,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:13:31,736 INFO L87 Difference]: Start difference. First operand 1030 states and 3346 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-13 20:13:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:32,293 INFO L93 Difference]: Finished difference Result 3932 states and 12604 transitions. [2021-07-13 20:13:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:13:32,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 32 [2021-07-13 20:13:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:32,320 INFO L225 Difference]: With dead ends: 3932 [2021-07-13 20:13:32,320 INFO L226 Difference]: Without dead ends: 3932 [2021-07-13 20:13:32,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:13:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-07-13 20:13:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2362. [2021-07-13 20:13:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 3.301143583227446) internal successors, (7794), 2361 states have internal predecessors, (7794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 7794 transitions. [2021-07-13 20:13:32,415 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 7794 transitions. Word has length 32 [2021-07-13 20:13:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:32,416 INFO L482 AbstractCegarLoop]: Abstraction has 2362 states and 7794 transitions. [2021-07-13 20:13:32,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-07-13 20:13:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 7794 transitions. [2021-07-13 20:13:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:32,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:32,422 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:32,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:13:32,648 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash 838478855, now seen corresponding path program 10 times [2021-07-13 20:13:32,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:32,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762488324] [2021-07-13 20:13:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:33,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762488324] [2021-07-13 20:13:33,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762488324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760779556] [2021-07-13 20:13:33,006 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 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 [2021-07-13 20:13:33,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:13:33,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:33,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760779556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:33,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:33,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:13:33,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588182791] [2021-07-13 20:13:33,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:13:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:13:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:13:33,975 INFO L87 Difference]: Start difference. First operand 2362 states and 7794 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:35,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:35,370 INFO L93 Difference]: Finished difference Result 4361 states and 13648 transitions. [2021-07-13 20:13:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:13:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:13:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:35,395 INFO L225 Difference]: With dead ends: 4361 [2021-07-13 20:13:35,395 INFO L226 Difference]: Without dead ends: 4300 [2021-07-13 20:13:35,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1536.1ms TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:13:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-07-13 20:13:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 2886. [2021-07-13 20:13:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2885 states have (on average 3.291854419410745) internal successors, (9497), 2885 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 9497 transitions. [2021-07-13 20:13:35,492 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 9497 transitions. Word has length 34 [2021-07-13 20:13:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:35,492 INFO L482 AbstractCegarLoop]: Abstraction has 2886 states and 9497 transitions. [2021-07-13 20:13:35,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 9497 transitions. [2021-07-13 20:13:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:35,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:35,532 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:35,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:13:35,745 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 50988291, now seen corresponding path program 11 times [2021-07-13 20:13:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:35,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703822470] [2021-07-13 20:13:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703822470] [2021-07-13 20:13:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703822470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731969708] [2021-07-13 20:13:36,043 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 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 [2021-07-13 20:13:36,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:13:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:13:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:36,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731969708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:36,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:36,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:13:36,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120317910] [2021-07-13 20:13:36,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:13:36,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:13:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:13:36,863 INFO L87 Difference]: Start difference. First operand 2886 states and 9497 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:40,441 INFO L93 Difference]: Finished difference Result 6279 states and 19987 transitions. [2021-07-13 20:13:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:13:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:13:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:40,468 INFO L225 Difference]: With dead ends: 6279 [2021-07-13 20:13:40,468 INFO L226 Difference]: Without dead ends: 6212 [2021-07-13 20:13:40,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 3155.4ms TimeCoverageRelationStatistics Valid=797, Invalid=6513, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:13:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-07-13 20:13:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 3002. [2021-07-13 20:13:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 3.3125624791736086) internal successors, (9941), 3001 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 9941 transitions. [2021-07-13 20:13:40,600 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 9941 transitions. Word has length 34 [2021-07-13 20:13:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:40,601 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 9941 transitions. [2021-07-13 20:13:40,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 9941 transitions. [2021-07-13 20:13:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:40,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:40,615 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:40,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:13:40,829 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1976257533, now seen corresponding path program 12 times [2021-07-13 20:13:40,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:40,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194296110] [2021-07-13 20:13:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:41,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:41,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194296110] [2021-07-13 20:13:41,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194296110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806074901] [2021-07-13 20:13:41,132 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 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 [2021-07-13 20:13:41,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:13:41,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:13:41,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:41,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806074901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:41,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:41,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:13:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316663250] [2021-07-13 20:13:41,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:41,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:41,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:41,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:41,847 INFO L87 Difference]: Start difference. First operand 3002 states and 9941 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:44,907 INFO L93 Difference]: Finished difference Result 7567 states and 24293 transitions. [2021-07-13 20:13:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:13:44,907 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:13:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:44,933 INFO L225 Difference]: With dead ends: 7567 [2021-07-13 20:13:44,933 INFO L226 Difference]: Without dead ends: 7487 [2021-07-13 20:13:44,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 2513.1ms TimeCoverageRelationStatistics Valid=971, Invalid=5671, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:13:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-07-13 20:13:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 3065. [2021-07-13 20:13:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 3.3188642297650133) internal successors, (10169), 3064 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 10169 transitions. [2021-07-13 20:13:45,065 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 10169 transitions. Word has length 34 [2021-07-13 20:13:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:45,066 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 10169 transitions. [2021-07-13 20:13:45,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 10169 transitions. [2021-07-13 20:13:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:45,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:45,101 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:45,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 20:13:45,302 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1410994709, now seen corresponding path program 13 times [2021-07-13 20:13:45,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:45,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665631032] [2021-07-13 20:13:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:45,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:45,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665631032] [2021-07-13 20:13:45,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665631032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:45,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011044076] [2021-07-13 20:13:45,596 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 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 [2021-07-13 20:13:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:13:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:46,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011044076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:46,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:46,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:13:46,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020976053] [2021-07-13 20:13:46,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:13:46,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:46,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:13:46,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:13:46,270 INFO L87 Difference]: Start difference. First operand 3065 states and 10169 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:49,383 INFO L93 Difference]: Finished difference Result 7955 states and 25900 transitions. [2021-07-13 20:13:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:13:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:13:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:49,406 INFO L225 Difference]: With dead ends: 7955 [2021-07-13 20:13:49,406 INFO L226 Difference]: Without dead ends: 7901 [2021-07-13 20:13:49,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 2727.6ms TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:13:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-07-13 20:13:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 3129. [2021-07-13 20:13:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 3128 states have (on average 3.317455242966752) internal successors, (10377), 3128 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 10377 transitions. [2021-07-13 20:13:49,541 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 10377 transitions. Word has length 34 [2021-07-13 20:13:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:49,542 INFO L482 AbstractCegarLoop]: Abstraction has 3129 states and 10377 transitions. [2021-07-13 20:13:49,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 10377 transitions. [2021-07-13 20:13:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:49,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:49,549 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:49,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:49,773 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -64975377, now seen corresponding path program 14 times [2021-07-13 20:13:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:49,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641983002] [2021-07-13 20:13:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:50,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:50,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641983002] [2021-07-13 20:13:50,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641983002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:50,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184945718] [2021-07-13 20:13:50,105 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 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 [2021-07-13 20:13:50,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:50,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:13:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:50,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184945718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:50,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:50,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:13:50,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851760580] [2021-07-13 20:13:50,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:50,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:50,787 INFO L87 Difference]: Start difference. First operand 3129 states and 10377 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:55,174 INFO L93 Difference]: Finished difference Result 9730 states and 31299 transitions. [2021-07-13 20:13:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:13:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:13:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:55,193 INFO L225 Difference]: With dead ends: 9730 [2021-07-13 20:13:55,193 INFO L226 Difference]: Without dead ends: 9650 [2021-07-13 20:13:55,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 3686.4ms TimeCoverageRelationStatistics Valid=1725, Invalid=7587, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:13:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-07-13 20:13:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 3598. [2021-07-13 20:13:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 3.33666944676119) internal successors, (12002), 3597 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 12002 transitions. [2021-07-13 20:13:55,316 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 12002 transitions. Word has length 34 [2021-07-13 20:13:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:55,316 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 12002 transitions. [2021-07-13 20:13:55,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 12002 transitions. [2021-07-13 20:13:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:55,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:55,324 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:55,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:13:55,545 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash 730172099, now seen corresponding path program 15 times [2021-07-13 20:13:55,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:55,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025310] [2021-07-13 20:13:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:55,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025310] [2021-07-13 20:13:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594705780] [2021-07-13 20:13:55,793 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 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 [2021-07-13 20:13:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:55,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:13:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:56,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594705780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:56,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:56,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:13:56,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265529919] [2021-07-13 20:13:56,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:13:56,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:13:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:13:56,379 INFO L87 Difference]: Start difference. First operand 3598 states and 12002 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:58,587 INFO L93 Difference]: Finished difference Result 6480 states and 21163 transitions. [2021-07-13 20:13:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:13:58,587 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:13:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:58,601 INFO L225 Difference]: With dead ends: 6480 [2021-07-13 20:13:58,601 INFO L226 Difference]: Without dead ends: 6400 [2021-07-13 20:13:58,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1889.3ms TimeCoverageRelationStatistics Valid=676, Invalid=3230, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:13:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2021-07-13 20:13:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 3795. [2021-07-13 20:13:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 3.3452820242488137) internal successors, (12692), 3794 states have internal predecessors, (12692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 12692 transitions. [2021-07-13 20:13:58,702 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 12692 transitions. Word has length 34 [2021-07-13 20:13:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:58,702 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 12692 transitions. [2021-07-13 20:13:58,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 12692 transitions. [2021-07-13 20:13:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:13:58,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:58,712 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:58,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:58,925 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1581764203, now seen corresponding path program 16 times [2021-07-13 20:13:58,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:58,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562789576] [2021-07-13 20:13:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:59,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562789576] [2021-07-13 20:13:59,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562789576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467363640] [2021-07-13 20:13:59,226 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 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 [2021-07-13 20:13:59,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:13:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:59,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467363640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:59,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:59,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:13:59,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687737200] [2021-07-13 20:13:59,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:13:59,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:13:59,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:13:59,817 INFO L87 Difference]: Start difference. First operand 3795 states and 12692 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:01,359 INFO L93 Difference]: Finished difference Result 7367 states and 24066 transitions. [2021-07-13 20:14:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:14:01,359 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:01,372 INFO L225 Difference]: With dead ends: 7367 [2021-07-13 20:14:01,373 INFO L226 Difference]: Without dead ends: 7287 [2021-07-13 20:14:01,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1479.9ms TimeCoverageRelationStatistics Valid=604, Invalid=2476, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:14:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-07-13 20:14:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 3801. [2021-07-13 20:14:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 3.344736842105263) internal successors, (12710), 3800 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 12710 transitions. [2021-07-13 20:14:01,480 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 12710 transitions. Word has length 34 [2021-07-13 20:14:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:01,481 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 12710 transitions. [2021-07-13 20:14:01,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 12710 transitions. [2021-07-13 20:14:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:01,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:01,490 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:01,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:01,705 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1949898713, now seen corresponding path program 17 times [2021-07-13 20:14:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:01,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681251425] [2021-07-13 20:14:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:01,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:01,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681251425] [2021-07-13 20:14:01,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681251425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:01,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440725490] [2021-07-13 20:14:01,979 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 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 [2021-07-13 20:14:02,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:14:02,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:02,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:02,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440725490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:02,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:02,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:14:02,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629243964] [2021-07-13 20:14:02,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:14:02,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:02,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:14:02,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:14:02,631 INFO L87 Difference]: Start difference. First operand 3801 states and 12710 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:05,100 INFO L93 Difference]: Finished difference Result 7831 states and 25197 transitions. [2021-07-13 20:14:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:14:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:05,113 INFO L225 Difference]: With dead ends: 7831 [2021-07-13 20:14:05,114 INFO L226 Difference]: Without dead ends: 7757 [2021-07-13 20:14:05,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 2172.6ms TimeCoverageRelationStatistics Valid=959, Invalid=4443, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:14:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2021-07-13 20:14:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 4023. [2021-07-13 20:14:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4023 states, 4022 states have (on average 3.3495773247140725) internal successors, (13472), 4022 states have internal predecessors, (13472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4023 states to 4023 states and 13472 transitions. [2021-07-13 20:14:05,214 INFO L78 Accepts]: Start accepts. Automaton has 4023 states and 13472 transitions. Word has length 34 [2021-07-13 20:14:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:05,214 INFO L482 AbstractCegarLoop]: Abstraction has 4023 states and 13472 transitions. [2021-07-13 20:14:05,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4023 states and 13472 transitions. [2021-07-13 20:14:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:05,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:05,223 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:05,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:05,426 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1232330713, now seen corresponding path program 18 times [2021-07-13 20:14:05,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:05,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115985298] [2021-07-13 20:14:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:05,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115985298] [2021-07-13 20:14:05,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115985298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853536729] [2021-07-13 20:14:05,725 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 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 [2021-07-13 20:14:05,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:14:05,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853536729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:06,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:06,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:14:06,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601769668] [2021-07-13 20:14:06,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:06,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:06,354 INFO L87 Difference]: Start difference. First operand 4023 states and 13472 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:08,538 INFO L93 Difference]: Finished difference Result 9755 states and 31342 transitions. [2021-07-13 20:14:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:14:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:08,559 INFO L225 Difference]: With dead ends: 9755 [2021-07-13 20:14:08,560 INFO L226 Difference]: Without dead ends: 9657 [2021-07-13 20:14:08,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1844.3ms TimeCoverageRelationStatistics Valid=811, Invalid=3221, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:14:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-07-13 20:14:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 4014. [2021-07-13 20:14:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 3.346872663842512) internal successors, (13431), 4013 states have internal predecessors, (13431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 13431 transitions. [2021-07-13 20:14:08,689 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 13431 transitions. Word has length 34 [2021-07-13 20:14:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:08,689 INFO L482 AbstractCegarLoop]: Abstraction has 4014 states and 13431 transitions. [2021-07-13 20:14:08,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 13431 transitions. [2021-07-13 20:14:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:08,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:08,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:08,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:14:08,913 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1243426667, now seen corresponding path program 19 times [2021-07-13 20:14:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:08,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701229061] [2021-07-13 20:14:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:09,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:09,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701229061] [2021-07-13 20:14:09,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701229061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:09,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841024243] [2021-07-13 20:14:09,209 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 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 [2021-07-13 20:14:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:09,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841024243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:09,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:09,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:14:09,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046274497] [2021-07-13 20:14:09,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:09,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:09,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:09,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:09,854 INFO L87 Difference]: Start difference. First operand 4014 states and 13431 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:11,568 INFO L93 Difference]: Finished difference Result 8284 states and 27139 transitions. [2021-07-13 20:14:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:14:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:11,587 INFO L225 Difference]: With dead ends: 8284 [2021-07-13 20:14:11,587 INFO L226 Difference]: Without dead ends: 8204 [2021-07-13 20:14:11,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1596.1ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:14:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8204 states. [2021-07-13 20:14:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8204 to 4042. [2021-07-13 20:14:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 3.344469190794358) internal successors, (13515), 4041 states have internal predecessors, (13515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 13515 transitions. [2021-07-13 20:14:11,701 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 13515 transitions. Word has length 34 [2021-07-13 20:14:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:11,701 INFO L482 AbstractCegarLoop]: Abstraction has 4042 states and 13515 transitions. [2021-07-13 20:14:11,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 13515 transitions. [2021-07-13 20:14:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:11,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:11,710 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:11,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:14:11,935 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash -340315217, now seen corresponding path program 20 times [2021-07-13 20:14:11,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:11,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417326813] [2021-07-13 20:14:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:12,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:12,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417326813] [2021-07-13 20:14:12,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417326813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:12,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306597817] [2021-07-13 20:14:12,196 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 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 [2021-07-13 20:14:12,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:12,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:12,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306597817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:12,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:12,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:14:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243778161] [2021-07-13 20:14:12,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:12,832 INFO L87 Difference]: Start difference. First operand 4042 states and 13515 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:15,713 INFO L93 Difference]: Finished difference Result 6717 states and 21820 transitions. [2021-07-13 20:14:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:14:15,714 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:15,728 INFO L225 Difference]: With dead ends: 6717 [2021-07-13 20:14:15,728 INFO L226 Difference]: Without dead ends: 6650 [2021-07-13 20:14:15,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2407.7ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:14:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2021-07-13 20:14:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 4254. [2021-07-13 20:14:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 3.347989654361627) internal successors, (14239), 4253 states have internal predecessors, (14239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 14239 transitions. [2021-07-13 20:14:15,847 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 14239 transitions. Word has length 34 [2021-07-13 20:14:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:15,847 INFO L482 AbstractCegarLoop]: Abstraction has 4254 states and 14239 transitions. [2021-07-13 20:14:15,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 14239 transitions. [2021-07-13 20:14:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:15,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:15,855 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:16,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:14:16,056 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1800851591, now seen corresponding path program 21 times [2021-07-13 20:14:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:16,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589376930] [2021-07-13 20:14:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:16,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589376930] [2021-07-13 20:14:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589376930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456934846] [2021-07-13 20:14:16,294 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 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 [2021-07-13 20:14:16,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:14:16,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:16,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:16,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456934846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:16,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:16,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:14:16,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673061787] [2021-07-13 20:14:16,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:14:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:16,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:14:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:14:16,871 INFO L87 Difference]: Start difference. First operand 4254 states and 14239 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:19,081 INFO L93 Difference]: Finished difference Result 6962 states and 22749 transitions. [2021-07-13 20:14:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:14:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:19,095 INFO L225 Difference]: With dead ends: 6962 [2021-07-13 20:14:19,096 INFO L226 Difference]: Without dead ends: 6888 [2021-07-13 20:14:19,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1810.0ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:14:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6888 states. [2021-07-13 20:14:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6888 to 4296. [2021-07-13 20:14:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 3.350640279394645) internal successors, (14391), 4295 states have internal predecessors, (14391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 14391 transitions. [2021-07-13 20:14:19,221 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 14391 transitions. Word has length 34 [2021-07-13 20:14:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:19,221 INFO L482 AbstractCegarLoop]: Abstraction has 4296 states and 14391 transitions. [2021-07-13 20:14:19,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 14391 transitions. [2021-07-13 20:14:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:19,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:19,229 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:19,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:19,429 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1642523601, now seen corresponding path program 22 times [2021-07-13 20:14:19,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:19,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445884273] [2021-07-13 20:14:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:19,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445884273] [2021-07-13 20:14:19,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445884273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845159008] [2021-07-13 20:14:19,690 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 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 [2021-07-13 20:14:19,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:20,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845159008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:20,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:20,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:14:20,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475547705] [2021-07-13 20:14:20,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:20,340 INFO L87 Difference]: Start difference. First operand 4296 states and 14391 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:21,805 INFO L93 Difference]: Finished difference Result 7878 states and 25603 transitions. [2021-07-13 20:14:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:14:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:21,821 INFO L225 Difference]: With dead ends: 7878 [2021-07-13 20:14:21,821 INFO L226 Difference]: Without dead ends: 7798 [2021-07-13 20:14:21,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1411.4ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:14:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7798 states. [2021-07-13 20:14:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7798 to 4296. [2021-07-13 20:14:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 3.350640279394645) internal successors, (14391), 4295 states have internal predecessors, (14391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 14391 transitions. [2021-07-13 20:14:21,944 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 14391 transitions. Word has length 34 [2021-07-13 20:14:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:21,944 INFO L482 AbstractCegarLoop]: Abstraction has 4296 states and 14391 transitions. [2021-07-13 20:14:21,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 14391 transitions. [2021-07-13 20:14:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:21,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:21,953 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:22,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:22,154 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -879219221, now seen corresponding path program 23 times [2021-07-13 20:14:22,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:22,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652044834] [2021-07-13 20:14:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:22,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652044834] [2021-07-13 20:14:22,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652044834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:22,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346489393] [2021-07-13 20:14:22,459 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 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 [2021-07-13 20:14:22,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:14:22,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:23,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346489393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:23,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:23,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:14:23,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480116946] [2021-07-13 20:14:23,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:14:23,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:14:23,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:14:23,131 INFO L87 Difference]: Start difference. First operand 4296 states and 14391 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:25,732 INFO L93 Difference]: Finished difference Result 8182 states and 26322 transitions. [2021-07-13 20:14:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:14:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:25,748 INFO L225 Difference]: With dead ends: 8182 [2021-07-13 20:14:25,748 INFO L226 Difference]: Without dead ends: 8114 [2021-07-13 20:14:25,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2247.7ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:14:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8114 states. [2021-07-13 20:14:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8114 to 4724. [2021-07-13 20:14:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 3.344484437857294) internal successors, (15796), 4723 states have internal predecessors, (15796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 15796 transitions. [2021-07-13 20:14:25,864 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 15796 transitions. Word has length 34 [2021-07-13 20:14:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:25,864 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 15796 transitions. [2021-07-13 20:14:25,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 15796 transitions. [2021-07-13 20:14:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:25,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:25,875 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:26,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:26,077 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash -161651221, now seen corresponding path program 24 times [2021-07-13 20:14:26,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:26,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908884682] [2021-07-13 20:14:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:26,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:26,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908884682] [2021-07-13 20:14:26,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908884682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:26,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47271975] [2021-07-13 20:14:26,373 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 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 [2021-07-13 20:14:26,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:14:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47271975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:26,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:26,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:14:26,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883330132] [2021-07-13 20:14:26,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:26,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:26,931 INFO L87 Difference]: Start difference. First operand 4724 states and 15796 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:28,595 INFO L93 Difference]: Finished difference Result 10049 states and 32535 transitions. [2021-07-13 20:14:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:14:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:28,615 INFO L225 Difference]: With dead ends: 10049 [2021-07-13 20:14:28,615 INFO L226 Difference]: Without dead ends: 9951 [2021-07-13 20:14:28,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1538.6ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:14:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9951 states. [2021-07-13 20:14:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9951 to 4716. [2021-07-13 20:14:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4716 states, 4715 states have (on average 3.343796394485684) internal successors, (15766), 4715 states have internal predecessors, (15766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 15766 transitions. [2021-07-13 20:14:28,734 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 15766 transitions. Word has length 34 [2021-07-13 20:14:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:28,734 INFO L482 AbstractCegarLoop]: Abstraction has 4716 states and 15766 transitions. [2021-07-13 20:14:28,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 15766 transitions. [2021-07-13 20:14:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:28,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:28,743 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:28,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:28,945 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:28,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1980861137, now seen corresponding path program 25 times [2021-07-13 20:14:28,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:28,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262808481] [2021-07-13 20:14:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:29,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262808481] [2021-07-13 20:14:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262808481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:29,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176531634] [2021-07-13 20:14:29,220 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 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 [2021-07-13 20:14:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:29,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:29,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176531634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:29,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:29,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:14:29,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703397796] [2021-07-13 20:14:29,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:29,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:29,858 INFO L87 Difference]: Start difference. First operand 4716 states and 15766 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:31,428 INFO L93 Difference]: Finished difference Result 8635 states and 28029 transitions. [2021-07-13 20:14:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:14:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:31,445 INFO L225 Difference]: With dead ends: 8635 [2021-07-13 20:14:31,446 INFO L226 Difference]: Without dead ends: 8555 [2021-07-13 20:14:31,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1395.6ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:14:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2021-07-13 20:14:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 4724. [2021-07-13 20:14:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 3.3432140588608936) internal successors, (15790), 4723 states have internal predecessors, (15790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 15790 transitions. [2021-07-13 20:14:31,543 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 15790 transitions. Word has length 34 [2021-07-13 20:14:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:31,543 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 15790 transitions. [2021-07-13 20:14:31,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 15790 transitions. [2021-07-13 20:14:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:31,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:31,550 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:31,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:31,750 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1893297345, now seen corresponding path program 26 times [2021-07-13 20:14:31,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:31,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692495190] [2021-07-13 20:14:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:31,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692495190] [2021-07-13 20:14:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692495190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784804225] [2021-07-13 20:14:31,994 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 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 [2021-07-13 20:14:32,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:32,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784804225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:32,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:32,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:14:32,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008186003] [2021-07-13 20:14:32,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:14:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:14:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:14:32,503 INFO L87 Difference]: Start difference. First operand 4724 states and 15790 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:35,500 INFO L93 Difference]: Finished difference Result 10197 states and 32798 transitions. [2021-07-13 20:14:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:14:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:35,520 INFO L225 Difference]: With dead ends: 10197 [2021-07-13 20:14:35,520 INFO L226 Difference]: Without dead ends: 10117 [2021-07-13 20:14:35,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2385.2ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:14:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10117 states. [2021-07-13 20:14:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10117 to 5128. [2021-07-13 20:14:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 3.365320850399844) internal successors, (17254), 5127 states have internal predecessors, (17254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 17254 transitions. [2021-07-13 20:14:35,656 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 17254 transitions. Word has length 34 [2021-07-13 20:14:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:35,656 INFO L482 AbstractCegarLoop]: Abstraction has 5128 states and 17254 transitions. [2021-07-13 20:14:35,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 17254 transitions. [2021-07-13 20:14:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:35,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:35,663 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:35,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:35,864 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash -19336385, now seen corresponding path program 27 times [2021-07-13 20:14:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271419442] [2021-07-13 20:14:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:36,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271419442] [2021-07-13 20:14:36,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271419442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101127651] [2021-07-13 20:14:36,108 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 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 [2021-07-13 20:14:36,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:14:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:36,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101127651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:36,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:36,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:14:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313878302] [2021-07-13 20:14:36,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:14:36,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:14:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:14:36,611 INFO L87 Difference]: Start difference. First operand 5128 states and 17254 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:38,387 INFO L93 Difference]: Finished difference Result 10381 states and 34296 transitions. [2021-07-13 20:14:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:14:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:38,410 INFO L225 Difference]: With dead ends: 10381 [2021-07-13 20:14:38,410 INFO L226 Difference]: Without dead ends: 10301 [2021-07-13 20:14:38,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1565.7ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:14:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10301 states. [2021-07-13 20:14:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10301 to 5182. [2021-07-13 20:14:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5181 states have (on average 3.3707778421154218) internal successors, (17464), 5181 states have internal predecessors, (17464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 17464 transitions. [2021-07-13 20:14:38,598 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 17464 transitions. Word has length 34 [2021-07-13 20:14:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:38,598 INFO L482 AbstractCegarLoop]: Abstraction has 5182 states and 17464 transitions. [2021-07-13 20:14:38,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 17464 transitions. [2021-07-13 20:14:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:38,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:38,605 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:38,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 20:14:38,807 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1948594351, now seen corresponding path program 28 times [2021-07-13 20:14:38,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:38,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410791380] [2021-07-13 20:14:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:39,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:39,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410791380] [2021-07-13 20:14:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410791380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:39,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910410408] [2021-07-13 20:14:39,044 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 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 [2021-07-13 20:14:39,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:39,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910410408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:39,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:39,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:14:39,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126400121] [2021-07-13 20:14:39,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:14:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:14:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:14:39,662 INFO L87 Difference]: Start difference. First operand 5182 states and 17464 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:41,384 INFO L93 Difference]: Finished difference Result 8417 states and 27168 transitions. [2021-07-13 20:14:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:14:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:41,402 INFO L225 Difference]: With dead ends: 8417 [2021-07-13 20:14:41,402 INFO L226 Difference]: Without dead ends: 8356 [2021-07-13 20:14:41,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1717.0ms TimeCoverageRelationStatistics Valid=698, Invalid=3592, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:14:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-07-13 20:14:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 5270. [2021-07-13 20:14:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 5269 states have (on average 3.371417726323781) internal successors, (17764), 5269 states have internal predecessors, (17764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 17764 transitions. [2021-07-13 20:14:41,518 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 17764 transitions. Word has length 34 [2021-07-13 20:14:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:41,519 INFO L482 AbstractCegarLoop]: Abstraction has 5270 states and 17764 transitions. [2021-07-13 20:14:41,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 17764 transitions. [2021-07-13 20:14:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:41,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:41,527 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:41,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-13 20:14:41,729 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:41,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1197449425, now seen corresponding path program 29 times [2021-07-13 20:14:41,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:41,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759049288] [2021-07-13 20:14:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:41,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759049288] [2021-07-13 20:14:41,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759049288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808137911] [2021-07-13 20:14:41,988 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 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 [2021-07-13 20:14:42,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:14:42,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:14:42,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808137911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:42,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:14:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763976478] [2021-07-13 20:14:42,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:14:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:14:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:14:42,516 INFO L87 Difference]: Start difference. First operand 5270 states and 17764 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:45,541 INFO L93 Difference]: Finished difference Result 9930 states and 32502 transitions. [2021-07-13 20:14:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:14:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:45,562 INFO L225 Difference]: With dead ends: 9930 [2021-07-13 20:14:45,562 INFO L226 Difference]: Without dead ends: 9810 [2021-07-13 20:14:45,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 2591.1ms TimeCoverageRelationStatistics Valid=1258, Invalid=6224, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:14:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-13 20:14:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 5348. [2021-07-13 20:14:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 3.372732373293436) internal successors, (18034), 5347 states have internal predecessors, (18034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 18034 transitions. [2021-07-13 20:14:45,697 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 18034 transitions. Word has length 34 [2021-07-13 20:14:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:45,697 INFO L482 AbstractCegarLoop]: Abstraction has 5348 states and 18034 transitions. [2021-07-13 20:14:45,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 18034 transitions. [2021-07-13 20:14:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:45,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:45,705 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:45,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-13 20:14:45,911 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2119003857, now seen corresponding path program 30 times [2021-07-13 20:14:45,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:45,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650968550] [2021-07-13 20:14:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:46,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:46,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650968550] [2021-07-13 20:14:46,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650968550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:46,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251910673] [2021-07-13 20:14:46,162 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 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 [2021-07-13 20:14:46,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:14:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:46,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251910673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:46,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:46,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:14:46,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96706019] [2021-07-13 20:14:46,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:46,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:46,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:46,796 INFO L87 Difference]: Start difference. First operand 5348 states and 18034 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:48,233 INFO L93 Difference]: Finished difference Result 7662 states and 24942 transitions. [2021-07-13 20:14:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:14:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:48,250 INFO L225 Difference]: With dead ends: 7662 [2021-07-13 20:14:48,250 INFO L226 Difference]: Without dead ends: 7588 [2021-07-13 20:14:48,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1445.4ms TimeCoverageRelationStatistics Valid=485, Invalid=2707, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:14:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-07-13 20:14:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 5476. [2021-07-13 20:14:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 5475 states have (on average 3.3782648401826485) internal successors, (18496), 5475 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 18496 transitions. [2021-07-13 20:14:48,374 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 18496 transitions. Word has length 34 [2021-07-13 20:14:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:48,374 INFO L482 AbstractCegarLoop]: Abstraction has 5476 states and 18496 transitions. [2021-07-13 20:14:48,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 18496 transitions. [2021-07-13 20:14:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:48,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:48,383 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:48,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:48,583 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 943865091, now seen corresponding path program 31 times [2021-07-13 20:14:48,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:48,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984676216] [2021-07-13 20:14:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984676216] [2021-07-13 20:14:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984676216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758285783] [2021-07-13 20:14:48,790 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 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 [2021-07-13 20:14:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:49,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758285783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:49,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:49,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:14:49,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917278308] [2021-07-13 20:14:49,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:49,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:49,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:49,333 INFO L87 Difference]: Start difference. First operand 5476 states and 18496 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:50,588 INFO L93 Difference]: Finished difference Result 8307 states and 27676 transitions. [2021-07-13 20:14:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:14:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:50,606 INFO L225 Difference]: With dead ends: 8307 [2021-07-13 20:14:50,606 INFO L226 Difference]: Without dead ends: 8227 [2021-07-13 20:14:50,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=432, Invalid=2018, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:14:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-07-13 20:14:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 5476. [2021-07-13 20:14:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 5475 states have (on average 3.3782648401826485) internal successors, (18496), 5475 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 18496 transitions. [2021-07-13 20:14:50,725 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 18496 transitions. Word has length 34 [2021-07-13 20:14:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:50,725 INFO L482 AbstractCegarLoop]: Abstraction has 5476 states and 18496 transitions. [2021-07-13 20:14:50,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 18496 transitions. [2021-07-13 20:14:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:50,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:50,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:50,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:50,934 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 873755055, now seen corresponding path program 32 times [2021-07-13 20:14:50,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:50,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942386441] [2021-07-13 20:14:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:51,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:51,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942386441] [2021-07-13 20:14:51,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942386441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:51,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737898254] [2021-07-13 20:14:51,174 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 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 [2021-07-13 20:14:51,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:51,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:51,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737898254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:51,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:51,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:14:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702996382] [2021-07-13 20:14:51,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:14:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:14:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:14:51,699 INFO L87 Difference]: Start difference. First operand 5476 states and 18496 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:52,819 INFO L93 Difference]: Finished difference Result 7182 states and 24008 transitions. [2021-07-13 20:14:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:14:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:52,835 INFO L225 Difference]: With dead ends: 7182 [2021-07-13 20:14:52,836 INFO L226 Difference]: Without dead ends: 7102 [2021-07-13 20:14:52,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7102 states. [2021-07-13 20:14:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7102 to 5480. [2021-07-13 20:14:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.3779886840664353) internal successors, (18508), 5479 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18508 transitions. [2021-07-13 20:14:52,950 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18508 transitions. Word has length 34 [2021-07-13 20:14:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:52,951 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18508 transitions. [2021-07-13 20:14:52,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18508 transitions. [2021-07-13 20:14:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:52,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:52,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:53,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:53,181 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash -665197461, now seen corresponding path program 33 times [2021-07-13 20:14:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:53,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687642236] [2021-07-13 20:14:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:53,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:53,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687642236] [2021-07-13 20:14:53,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687642236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083978887] [2021-07-13 20:14:53,438 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 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 [2021-07-13 20:14:53,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:14:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:53,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:53,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083978887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:53,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:53,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:14:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007210797] [2021-07-13 20:14:53,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:53,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:53,999 INFO L87 Difference]: Start difference. First operand 5480 states and 18508 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:55,333 INFO L93 Difference]: Finished difference Result 8919 states and 29121 transitions. [2021-07-13 20:14:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:14:55,333 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:55,352 INFO L225 Difference]: With dead ends: 8919 [2021-07-13 20:14:55,352 INFO L226 Difference]: Without dead ends: 8821 [2021-07-13 20:14:55,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:14:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-07-13 20:14:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 5486. [2021-07-13 20:14:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3757520510483134) internal successors, (18516), 5485 states have internal predecessors, (18516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18516 transitions. [2021-07-13 20:14:55,489 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18516 transitions. Word has length 34 [2021-07-13 20:14:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:55,489 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18516 transitions. [2021-07-13 20:14:55,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18516 transitions. [2021-07-13 20:14:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:55,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:55,504 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:55,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-07-13 20:14:55,717 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:55,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1810559919, now seen corresponding path program 34 times [2021-07-13 20:14:55,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:55,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355319795] [2021-07-13 20:14:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:55,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355319795] [2021-07-13 20:14:55,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355319795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567233173] [2021-07-13 20:14:55,973 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 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 [2021-07-13 20:14:56,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:56,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:14:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:56,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567233173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:56,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:56,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:14:56,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020368271] [2021-07-13 20:14:56,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:14:56,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:14:56,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:14:56,537 INFO L87 Difference]: Start difference. First operand 5486 states and 18516 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:57,517 INFO L93 Difference]: Finished difference Result 6882 states and 22930 transitions. [2021-07-13 20:14:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:14:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:14:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:57,535 INFO L225 Difference]: With dead ends: 6882 [2021-07-13 20:14:57,535 INFO L226 Difference]: Without dead ends: 6802 [2021-07-13 20:14:57,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1077.2ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:14:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6802 states. [2021-07-13 20:14:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6802 to 5486. [2021-07-13 20:14:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3757520510483134) internal successors, (18516), 5485 states have internal predecessors, (18516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18516 transitions. [2021-07-13 20:14:57,691 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18516 transitions. Word has length 34 [2021-07-13 20:14:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:57,691 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18516 transitions. [2021-07-13 20:14:57,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18516 transitions. [2021-07-13 20:14:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:14:57,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:57,700 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:57,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:57,901 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash 306804211, now seen corresponding path program 35 times [2021-07-13 20:14:57,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:57,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340837769] [2021-07-13 20:14:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:58,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340837769] [2021-07-13 20:14:58,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340837769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962027144] [2021-07-13 20:14:58,140 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 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 [2021-07-13 20:14:58,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:14:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:14:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962027144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:58,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:58,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:14:58,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704366515] [2021-07-13 20:14:58,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:14:58,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:14:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:14:58,769 INFO L87 Difference]: Start difference. First operand 5486 states and 18516 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:00,258 INFO L93 Difference]: Finished difference Result 8217 states and 26906 transitions. [2021-07-13 20:15:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:15:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:00,276 INFO L225 Difference]: With dead ends: 8217 [2021-07-13 20:15:00,276 INFO L226 Difference]: Without dead ends: 8156 [2021-07-13 20:15:00,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1275.4ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:15:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-07-13 20:15:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 5558. [2021-07-13 20:15:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5557 states have (on average 3.3773618859096635) internal successors, (18768), 5557 states have internal predecessors, (18768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 18768 transitions. [2021-07-13 20:15:00,400 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 18768 transitions. Word has length 34 [2021-07-13 20:15:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:00,401 INFO L482 AbstractCegarLoop]: Abstraction has 5558 states and 18768 transitions. [2021-07-13 20:15:00,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 18768 transitions. [2021-07-13 20:15:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:00,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:00,411 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:00,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-13 20:15:00,627 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1720441613, now seen corresponding path program 36 times [2021-07-13 20:15:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:00,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759636288] [2021-07-13 20:15:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:00,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:00,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759636288] [2021-07-13 20:15:00,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759636288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:00,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577052883] [2021-07-13 20:15:00,877 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 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 [2021-07-13 20:15:00,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:15:00,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:00,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:15:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:01,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577052883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:01,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:01,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-07-13 20:15:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067132547] [2021-07-13 20:15:01,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:01,426 INFO L87 Difference]: Start difference. First operand 5558 states and 18768 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:03,985 INFO L93 Difference]: Finished difference Result 10751 states and 35569 transitions. [2021-07-13 20:15:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:15:03,987 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:04,008 INFO L225 Difference]: With dead ends: 10751 [2021-07-13 20:15:04,009 INFO L226 Difference]: Without dead ends: 10671 [2021-07-13 20:15:04,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 2012.8ms TimeCoverageRelationStatistics Valid=902, Invalid=4354, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:15:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2021-07-13 20:15:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 5448. [2021-07-13 20:15:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 3.3677253534055445) internal successors, (18344), 5447 states have internal predecessors, (18344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 18344 transitions. [2021-07-13 20:15:04,146 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 18344 transitions. Word has length 34 [2021-07-13 20:15:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:04,146 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 18344 transitions. [2021-07-13 20:15:04,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 18344 transitions. [2021-07-13 20:15:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:04,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:04,155 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:04,369 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash -995404173, now seen corresponding path program 37 times [2021-07-13 20:15:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800747835] [2021-07-13 20:15:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:04,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:04,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800747835] [2021-07-13 20:15:04,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800747835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:04,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832584991] [2021-07-13 20:15:04,611 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 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 [2021-07-13 20:15:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:04,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:15:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:05,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832584991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:05,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:05,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:15:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197439538] [2021-07-13 20:15:05,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:05,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:05,286 INFO L87 Difference]: Start difference. First operand 5448 states and 18344 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:06,641 INFO L93 Difference]: Finished difference Result 7476 states and 25000 transitions. [2021-07-13 20:15:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:15:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:06,659 INFO L225 Difference]: With dead ends: 7476 [2021-07-13 20:15:06,660 INFO L226 Difference]: Without dead ends: 7396 [2021-07-13 20:15:06,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1286.0ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:15:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2021-07-13 20:15:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 5456. [2021-07-13 20:15:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 3.367186067827681) internal successors, (18368), 5455 states have internal predecessors, (18368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 18368 transitions. [2021-07-13 20:15:06,772 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 18368 transitions. Word has length 34 [2021-07-13 20:15:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:06,772 INFO L482 AbstractCegarLoop]: Abstraction has 5456 states and 18368 transitions. [2021-07-13 20:15:06,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 18368 transitions. [2021-07-13 20:15:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:06,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:06,781 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:06,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-07-13 20:15:06,981 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1333741709, now seen corresponding path program 38 times [2021-07-13 20:15:06,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:06,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078832161] [2021-07-13 20:15:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:07,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078832161] [2021-07-13 20:15:07,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078832161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48321277] [2021-07-13 20:15:07,222 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 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 [2021-07-13 20:15:07,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:15:07,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:07,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48321277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:07,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:07,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:15:07,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665754143] [2021-07-13 20:15:07,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:07,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:07,765 INFO L87 Difference]: Start difference. First operand 5456 states and 18368 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:09,008 INFO L93 Difference]: Finished difference Result 7452 states and 24922 transitions. [2021-07-13 20:15:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:15:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:09,026 INFO L225 Difference]: With dead ends: 7452 [2021-07-13 20:15:09,026 INFO L226 Difference]: Without dead ends: 7372 [2021-07-13 20:15:09,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1183.5ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:15:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2021-07-13 20:15:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 5458. [2021-07-13 20:15:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5458 states, 5457 states have (on average 3.367051493494594) internal successors, (18374), 5457 states have internal predecessors, (18374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 18374 transitions. [2021-07-13 20:15:09,138 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 18374 transitions. Word has length 34 [2021-07-13 20:15:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:09,140 INFO L482 AbstractCegarLoop]: Abstraction has 5458 states and 18374 transitions. [2021-07-13 20:15:09,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 18374 transitions. [2021-07-13 20:15:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:09,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:09,149 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:09,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-07-13 20:15:09,350 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:09,350 INFO L82 PathProgramCache]: Analyzing trace with hash -58599309, now seen corresponding path program 39 times [2021-07-13 20:15:09,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:09,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25270671] [2021-07-13 20:15:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:09,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:09,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25270671] [2021-07-13 20:15:09,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25270671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:09,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961653043] [2021-07-13 20:15:09,590 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 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 [2021-07-13 20:15:09,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:15:09,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:09,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:15:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:10,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961653043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:10,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:10,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:15:10,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365712475] [2021-07-13 20:15:10,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:10,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:10,107 INFO L87 Difference]: Start difference. First operand 5458 states and 18374 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:11,519 INFO L93 Difference]: Finished difference Result 7436 states and 24862 transitions. [2021-07-13 20:15:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:15:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:11,535 INFO L225 Difference]: With dead ends: 7436 [2021-07-13 20:15:11,535 INFO L226 Difference]: Without dead ends: 7356 [2021-07-13 20:15:11,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1228.0ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:15:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7356 states. [2021-07-13 20:15:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7356 to 5396. [2021-07-13 20:15:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5396 states, 5395 states have (on average 3.367191844300278) internal successors, (18166), 5395 states have internal predecessors, (18166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5396 states to 5396 states and 18166 transitions. [2021-07-13 20:15:11,644 INFO L78 Accepts]: Start accepts. Automaton has 5396 states and 18166 transitions. Word has length 34 [2021-07-13 20:15:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:11,644 INFO L482 AbstractCegarLoop]: Abstraction has 5396 states and 18166 transitions. [2021-07-13 20:15:11,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5396 states and 18166 transitions. [2021-07-13 20:15:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:11,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:11,652 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:11,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:11,853 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1116590339, now seen corresponding path program 40 times [2021-07-13 20:15:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:11,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072742184] [2021-07-13 20:15:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:12,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:12,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072742184] [2021-07-13 20:15:12,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072742184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:12,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526450809] [2021-07-13 20:15:12,105 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 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 [2021-07-13 20:15:12,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:12,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:15:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:12,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526450809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:12,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:12,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:15:12,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461893378] [2021-07-13 20:15:12,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:15:12,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:12,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:15:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:15:12,845 INFO L87 Difference]: Start difference. First operand 5396 states and 18166 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:14,526 INFO L93 Difference]: Finished difference Result 8783 states and 28680 transitions. [2021-07-13 20:15:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:15:14,526 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:14,544 INFO L225 Difference]: With dead ends: 8783 [2021-07-13 20:15:14,544 INFO L226 Difference]: Without dead ends: 8722 [2021-07-13 20:15:14,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1526.1ms TimeCoverageRelationStatistics Valid=516, Invalid=2790, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:15:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-07-13 20:15:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 5510. [2021-07-13 20:15:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5510 states, 5509 states have (on average 3.372299872935197) internal successors, (18578), 5509 states have internal predecessors, (18578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5510 states to 5510 states and 18578 transitions. [2021-07-13 20:15:14,652 INFO L78 Accepts]: Start accepts. Automaton has 5510 states and 18578 transitions. Word has length 34 [2021-07-13 20:15:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:14,652 INFO L482 AbstractCegarLoop]: Abstraction has 5510 states and 18578 transitions. [2021-07-13 20:15:14,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5510 states and 18578 transitions. [2021-07-13 20:15:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:14,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:14,660 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:14,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:14,861 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash -910655485, now seen corresponding path program 41 times [2021-07-13 20:15:14,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:14,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454367432] [2021-07-13 20:15:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:15,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:15,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454367432] [2021-07-13 20:15:15,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454367432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:15,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32841980] [2021-07-13 20:15:15,103 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 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 [2021-07-13 20:15:15,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:15:15,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:15:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:15,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32841980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:15,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:15,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:15:15,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405841565] [2021-07-13 20:15:15,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:15:15,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:15,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:15:15,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:15,693 INFO L87 Difference]: Start difference. First operand 5510 states and 18578 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:18,448 INFO L93 Difference]: Finished difference Result 11624 states and 38305 transitions. [2021-07-13 20:15:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:15:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:18,473 INFO L225 Difference]: With dead ends: 11624 [2021-07-13 20:15:18,473 INFO L226 Difference]: Without dead ends: 11544 [2021-07-13 20:15:18,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2214.1ms TimeCoverageRelationStatistics Valid=1030, Invalid=5290, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:15:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2021-07-13 20:15:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 5428. [2021-07-13 20:15:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3653952459922607) internal successors, (18264), 5427 states have internal predecessors, (18264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18264 transitions. [2021-07-13 20:15:18,616 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18264 transitions. Word has length 34 [2021-07-13 20:15:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:18,616 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18264 transitions. [2021-07-13 20:15:18,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18264 transitions. [2021-07-13 20:15:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:18,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:18,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:18,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:18,824 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -185618045, now seen corresponding path program 42 times [2021-07-13 20:15:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:18,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133488203] [2021-07-13 20:15:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:19,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133488203] [2021-07-13 20:15:19,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133488203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544373310] [2021-07-13 20:15:19,063 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 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 [2021-07-13 20:15:19,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:15:19,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:15:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:19,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544373310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:19,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:19,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:15:19,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035607010] [2021-07-13 20:15:19,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:19,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:19,691 INFO L87 Difference]: Start difference. First operand 5428 states and 18264 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:21,252 INFO L93 Difference]: Finished difference Result 8144 states and 27072 transitions. [2021-07-13 20:15:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:15:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:21,269 INFO L225 Difference]: With dead ends: 8144 [2021-07-13 20:15:21,270 INFO L226 Difference]: Without dead ends: 8064 [2021-07-13 20:15:21,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1320.7ms TimeCoverageRelationStatistics Valid=519, Invalid=2343, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:15:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2021-07-13 20:15:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 5428. [2021-07-13 20:15:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3653952459922607) internal successors, (18264), 5427 states have internal predecessors, (18264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18264 transitions. [2021-07-13 20:15:21,377 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18264 transitions. Word has length 34 [2021-07-13 20:15:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:21,377 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18264 transitions. [2021-07-13 20:15:21,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18264 transitions. [2021-07-13 20:15:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:21,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:21,385 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:21,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:21,586 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash -523955581, now seen corresponding path program 43 times [2021-07-13 20:15:21,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:21,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915823228] [2021-07-13 20:15:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:21,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915823228] [2021-07-13 20:15:21,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915823228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475781666] [2021-07-13 20:15:21,791 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 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 [2021-07-13 20:15:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:15:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:22,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475781666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:22,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:22,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:15:22,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826523911] [2021-07-13 20:15:22,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:15:22,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:22,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:15:22,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:15:22,359 INFO L87 Difference]: Start difference. First operand 5428 states and 18264 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:23,882 INFO L93 Difference]: Finished difference Result 8029 states and 26707 transitions. [2021-07-13 20:15:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:15:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:23,899 INFO L225 Difference]: With dead ends: 8029 [2021-07-13 20:15:23,899 INFO L226 Difference]: Without dead ends: 7949 [2021-07-13 20:15:23,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1319.0ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:15:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2021-07-13 20:15:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 5404. [2021-07-13 20:15:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5404 states, 5403 states have (on average 3.3670183231538036) internal successors, (18192), 5403 states have internal predecessors, (18192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 18192 transitions. [2021-07-13 20:15:24,001 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 18192 transitions. Word has length 34 [2021-07-13 20:15:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:24,002 INFO L482 AbstractCegarLoop]: Abstraction has 5404 states and 18192 transitions. [2021-07-13 20:15:24,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 18192 transitions. [2021-07-13 20:15:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:15:24,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:24,009 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:24,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:24,210 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:24,210 INFO L82 PathProgramCache]: Analyzing trace with hash -88435649, now seen corresponding path program 44 times [2021-07-13 20:15:24,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:24,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352422573] [2021-07-13 20:15:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:24,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:24,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352422573] [2021-07-13 20:15:24,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352422573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:24,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313361981] [2021-07-13 20:15:24,452 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 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 [2021-07-13 20:15:24,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:15:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313361981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:25,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:25,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-07-13 20:15:25,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249320003] [2021-07-13 20:15:25,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:15:25,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:25,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:15:25,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:15:25,044 INFO L87 Difference]: Start difference. First operand 5404 states and 18192 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:26,854 INFO L93 Difference]: Finished difference Result 9790 states and 32624 transitions. [2021-07-13 20:15:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:15:26,855 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:15:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:26,873 INFO L225 Difference]: With dead ends: 9790 [2021-07-13 20:15:26,873 INFO L226 Difference]: Without dead ends: 9710 [2021-07-13 20:15:26,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1544.2ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:15:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2021-07-13 20:15:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 5416. [2021-07-13 20:15:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5416 states, 5415 states have (on average 3.3717451523545705) internal successors, (18258), 5415 states have internal predecessors, (18258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5416 states to 5416 states and 18258 transitions. [2021-07-13 20:15:26,989 INFO L78 Accepts]: Start accepts. Automaton has 5416 states and 18258 transitions. Word has length 34 [2021-07-13 20:15:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:26,989 INFO L482 AbstractCegarLoop]: Abstraction has 5416 states and 18258 transitions. [2021-07-13 20:15:26,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5416 states and 18258 transitions. [2021-07-13 20:15:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:26,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:26,997 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:27,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:27,198 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1454499685, now seen corresponding path program 45 times [2021-07-13 20:15:27,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:27,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487273292] [2021-07-13 20:15:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:15:27,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487273292] [2021-07-13 20:15:27,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487273292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116034346] [2021-07-13 20:15:27,512 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 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 [2021-07-13 20:15:27,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:15:27,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:27,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:15:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:28,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116034346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:28,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:15:28,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327767658] [2021-07-13 20:15:28,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:15:28,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:15:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:15:28,327 INFO L87 Difference]: Start difference. First operand 5416 states and 18258 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:30,842 INFO L93 Difference]: Finished difference Result 8760 states and 28557 transitions. [2021-07-13 20:15:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:15:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:30,861 INFO L225 Difference]: With dead ends: 8760 [2021-07-13 20:15:30,861 INFO L226 Difference]: Without dead ends: 8640 [2021-07-13 20:15:30,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2216.1ms TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:15:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2021-07-13 20:15:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 5608. [2021-07-13 20:15:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 5607 states have (on average 3.3679329409666487) internal successors, (18884), 5607 states have internal predecessors, (18884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 18884 transitions. [2021-07-13 20:15:30,983 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 18884 transitions. Word has length 36 [2021-07-13 20:15:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 5608 states and 18884 transitions. [2021-07-13 20:15:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 18884 transitions. [2021-07-13 20:15:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:30,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:30,991 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:31,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-07-13 20:15:31,192 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 616572517, now seen corresponding path program 46 times [2021-07-13 20:15:31,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:31,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820612069] [2021-07-13 20:15:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:15:31,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:31,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820612069] [2021-07-13 20:15:31,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820612069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:31,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705737152] [2021-07-13 20:15:31,489 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 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 [2021-07-13 20:15:31,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:31,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:15:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:32,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705737152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:32,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:32,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:15:32,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983255286] [2021-07-13 20:15:32,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:15:32,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:15:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:15:32,432 INFO L87 Difference]: Start difference. First operand 5608 states and 18884 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:34,060 INFO L93 Difference]: Finished difference Result 7566 states and 24536 transitions. [2021-07-13 20:15:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:15:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:34,076 INFO L225 Difference]: With dead ends: 7566 [2021-07-13 20:15:34,077 INFO L226 Difference]: Without dead ends: 7478 [2021-07-13 20:15:34,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1854.8ms TimeCoverageRelationStatistics Valid=622, Invalid=3160, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:15:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-07-13 20:15:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5708. [2021-07-13 20:15:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 5707 states have (on average 3.375854214123007) internal successors, (19266), 5707 states have internal predecessors, (19266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 19266 transitions. [2021-07-13 20:15:34,233 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 19266 transitions. Word has length 36 [2021-07-13 20:15:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:34,233 INFO L482 AbstractCegarLoop]: Abstraction has 5708 states and 19266 transitions. [2021-07-13 20:15:34,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 19266 transitions. [2021-07-13 20:15:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:34,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:34,242 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:34,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:34,446 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:34,447 INFO L82 PathProgramCache]: Analyzing trace with hash 128038497, now seen corresponding path program 47 times [2021-07-13 20:15:34,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:34,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010449185] [2021-07-13 20:15:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:34,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010449185] [2021-07-13 20:15:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010449185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:34,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594098774] [2021-07-13 20:15:34,730 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 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 [2021-07-13 20:15:34,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:15:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:15:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594098774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:35,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:35,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:15:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831937626] [2021-07-13 20:15:35,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:15:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:35,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:15:35,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:15:35,518 INFO L87 Difference]: Start difference. First operand 5708 states and 19266 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:39,579 INFO L93 Difference]: Finished difference Result 10266 states and 33601 transitions. [2021-07-13 20:15:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-13 20:15:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:39,602 INFO L225 Difference]: With dead ends: 10266 [2021-07-13 20:15:39,602 INFO L226 Difference]: Without dead ends: 10186 [2021-07-13 20:15:39,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3523.6ms TimeCoverageRelationStatistics Valid=1591, Invalid=8915, Unknown=0, NotChecked=0, Total=10506 [2021-07-13 20:15:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-07-13 20:15:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 5812. [2021-07-13 20:15:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.382894510411289) internal successors, (19658), 5811 states have internal predecessors, (19658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19658 transitions. [2021-07-13 20:15:39,756 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19658 transitions. Word has length 36 [2021-07-13 20:15:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:39,757 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 19658 transitions. [2021-07-13 20:15:39,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19658 transitions. [2021-07-13 20:15:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:39,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:39,766 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:39,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-13 20:15:39,990 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash 845606497, now seen corresponding path program 48 times [2021-07-13 20:15:39,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:39,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188527509] [2021-07-13 20:15:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:40,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188527509] [2021-07-13 20:15:40,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188527509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:40,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82659345] [2021-07-13 20:15:40,324 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 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 [2021-07-13 20:15:40,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:15:40,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:15:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:41,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82659345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:41,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:41,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-07-13 20:15:41,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017395239] [2021-07-13 20:15:41,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:15:41,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:15:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:15:41,129 INFO L87 Difference]: Start difference. First operand 5812 states and 19658 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:45,964 INFO L93 Difference]: Finished difference Result 11702 states and 38034 transitions. [2021-07-13 20:15:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:15:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:45,991 INFO L225 Difference]: With dead ends: 11702 [2021-07-13 20:15:45,991 INFO L226 Difference]: Without dead ends: 11573 [2021-07-13 20:15:45,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3958 ImplicationChecksByTransitivity, 4267.8ms TimeCoverageRelationStatistics Valid=1912, Invalid=9430, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:15:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11573 states. [2021-07-13 20:15:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11573 to 5820. [2021-07-13 20:15:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5820 states, 5819 states have (on average 3.3844303144870254) internal successors, (19694), 5819 states have internal predecessors, (19694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5820 states to 5820 states and 19694 transitions. [2021-07-13 20:15:46,195 INFO L78 Accepts]: Start accepts. Automaton has 5820 states and 19694 transitions. Word has length 36 [2021-07-13 20:15:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:46,195 INFO L482 AbstractCegarLoop]: Abstraction has 5820 states and 19694 transitions. [2021-07-13 20:15:46,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5820 states and 19694 transitions. [2021-07-13 20:15:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:46,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:46,205 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:46,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:46,406 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -794973879, now seen corresponding path program 49 times [2021-07-13 20:15:46,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:46,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884511072] [2021-07-13 20:15:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:46,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:46,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884511072] [2021-07-13 20:15:46,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884511072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:46,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017914466] [2021-07-13 20:15:46,728 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 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 [2021-07-13 20:15:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:15:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:47,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017914466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:47,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:47,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:15:47,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360620359] [2021-07-13 20:15:47,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:47,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:47,575 INFO L87 Difference]: Start difference. First operand 5820 states and 19694 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:50,296 INFO L93 Difference]: Finished difference Result 11277 states and 37353 transitions. [2021-07-13 20:15:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:15:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:50,322 INFO L225 Difference]: With dead ends: 11277 [2021-07-13 20:15:50,322 INFO L226 Difference]: Without dead ends: 11196 [2021-07-13 20:15:50,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 2634.8ms TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:15:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11196 states. [2021-07-13 20:15:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11196 to 5838. [2021-07-13 20:15:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.384958026383416) internal successors, (19758), 5837 states have internal predecessors, (19758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 19758 transitions. [2021-07-13 20:15:50,471 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 19758 transitions. Word has length 36 [2021-07-13 20:15:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:50,471 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 19758 transitions. [2021-07-13 20:15:50,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 19758 transitions. [2021-07-13 20:15:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:50,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:50,480 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:50,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-13 20:15:50,681 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash 551045453, now seen corresponding path program 50 times [2021-07-13 20:15:50,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:50,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598212788] [2021-07-13 20:15:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:51,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:51,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598212788] [2021-07-13 20:15:51,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598212788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:51,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43951983] [2021-07-13 20:15:51,004 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 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 [2021-07-13 20:15:51,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:51,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:15:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:51,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43951983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:51,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:51,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:15:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981605273] [2021-07-13 20:15:51,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:15:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:15:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:15:51,736 INFO L87 Difference]: Start difference. First operand 5838 states and 19758 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:55,452 INFO L93 Difference]: Finished difference Result 13892 states and 45550 transitions. [2021-07-13 20:15:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:15:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:55,485 INFO L225 Difference]: With dead ends: 13892 [2021-07-13 20:15:55,485 INFO L226 Difference]: Without dead ends: 13778 [2021-07-13 20:15:55,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 3266.7ms TimeCoverageRelationStatistics Valid=1450, Invalid=6922, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:15:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2021-07-13 20:15:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 5952. [2021-07-13 20:15:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5952 states, 5951 states have (on average 3.3886741724079985) internal successors, (20166), 5951 states have internal predecessors, (20166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5952 states to 5952 states and 20166 transitions. [2021-07-13 20:15:55,656 INFO L78 Accepts]: Start accepts. Automaton has 5952 states and 20166 transitions. Word has length 36 [2021-07-13 20:15:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:55,656 INFO L482 AbstractCegarLoop]: Abstraction has 5952 states and 20166 transitions. [2021-07-13 20:15:55,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5952 states and 20166 transitions. [2021-07-13 20:15:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:55,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:55,703 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:55,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-13 20:15:55,903 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1346192929, now seen corresponding path program 51 times [2021-07-13 20:15:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:55,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931864333] [2021-07-13 20:15:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:56,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:56,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931864333] [2021-07-13 20:15:56,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931864333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43050708] [2021-07-13 20:15:56,169 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 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 [2021-07-13 20:15:56,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:15:56,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:15:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:56,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43050708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:56,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:15:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860718522] [2021-07-13 20:15:56,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:15:56,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:15:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:15:56,876 INFO L87 Difference]: Start difference. First operand 5952 states and 20166 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:59,373 INFO L93 Difference]: Finished difference Result 9872 states and 32999 transitions. [2021-07-13 20:15:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:15:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:15:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:59,395 INFO L225 Difference]: With dead ends: 9872 [2021-07-13 20:15:59,395 INFO L226 Difference]: Without dead ends: 9752 [2021-07-13 20:15:59,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2116.0ms TimeCoverageRelationStatistics Valid=680, Invalid=3742, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:15:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9752 states. [2021-07-13 20:15:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9752 to 5996. [2021-07-13 20:15:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 5995 states have (on average 3.3911592994161803) internal successors, (20330), 5995 states have internal predecessors, (20330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 20330 transitions. [2021-07-13 20:15:59,573 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 20330 transitions. Word has length 36 [2021-07-13 20:15:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:59,573 INFO L482 AbstractCegarLoop]: Abstraction has 5996 states and 20330 transitions. [2021-07-13 20:15:59,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 20330 transitions. [2021-07-13 20:15:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:15:59,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:59,582 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-13 20:15:59,783 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2097182263, now seen corresponding path program 52 times [2021-07-13 20:15:59,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:59,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444659064] [2021-07-13 20:15:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:00,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:00,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444659064] [2021-07-13 20:16:00,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444659064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690423475] [2021-07-13 20:16:00,046 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 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 [2021-07-13 20:16:00,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:16:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:00,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690423475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:00,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:16:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098148242] [2021-07-13 20:16:00,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:00,812 INFO L87 Difference]: Start difference. First operand 5996 states and 20330 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:02,756 INFO L93 Difference]: Finished difference Result 10367 states and 34699 transitions. [2021-07-13 20:16:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:16:02,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:02,780 INFO L225 Difference]: With dead ends: 10367 [2021-07-13 20:16:02,780 INFO L226 Difference]: Without dead ends: 10247 [2021-07-13 20:16:02,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1821.8ms TimeCoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:16:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-07-13 20:16:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 6018. [2021-07-13 20:16:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 6017 states have (on average 3.3897291008808375) internal successors, (20396), 6017 states have internal predecessors, (20396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 20396 transitions. [2021-07-13 20:16:02,920 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 20396 transitions. Word has length 36 [2021-07-13 20:16:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:02,920 INFO L482 AbstractCegarLoop]: Abstraction has 6018 states and 20396 transitions. [2021-07-13 20:16:02,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 20396 transitions. [2021-07-13 20:16:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:02,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:02,929 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:03,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-13 20:16:03,130 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:03,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1333877883, now seen corresponding path program 53 times [2021-07-13 20:16:03,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:03,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356967418] [2021-07-13 20:16:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:03,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:03,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356967418] [2021-07-13 20:16:03,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356967418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095009428] [2021-07-13 20:16:03,399 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 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 [2021-07-13 20:16:03,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:16:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:16:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:04,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095009428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:04,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:04,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:16:04,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47900719] [2021-07-13 20:16:04,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:04,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:04,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:04,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:04,207 INFO L87 Difference]: Start difference. First operand 6018 states and 20396 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:05,710 INFO L93 Difference]: Finished difference Result 8680 states and 28780 transitions. [2021-07-13 20:16:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:16:05,711 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:05,730 INFO L225 Difference]: With dead ends: 8680 [2021-07-13 20:16:05,731 INFO L226 Difference]: Without dead ends: 8612 [2021-07-13 20:16:05,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1561.6ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:16:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8612 states. [2021-07-13 20:16:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8612 to 6106. [2021-07-13 20:16:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6106 states, 6105 states have (on average 3.396232596232596) internal successors, (20734), 6105 states have internal predecessors, (20734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 20734 transitions. [2021-07-13 20:16:05,899 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 20734 transitions. Word has length 36 [2021-07-13 20:16:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:05,899 INFO L482 AbstractCegarLoop]: Abstraction has 6106 states and 20734 transitions. [2021-07-13 20:16:05,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 20734 transitions. [2021-07-13 20:16:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:05,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:05,908 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:06,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-13 20:16:06,109 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -616309883, now seen corresponding path program 54 times [2021-07-13 20:16:06,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:06,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261144897] [2021-07-13 20:16:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:06,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:06,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261144897] [2021-07-13 20:16:06,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261144897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:06,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607623708] [2021-07-13 20:16:06,392 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 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 [2021-07-13 20:16:06,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:16:06,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:06,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:16:06,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:07,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607623708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:07,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:07,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:16:07,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693917506] [2021-07-13 20:16:07,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:07,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:07,163 INFO L87 Difference]: Start difference. First operand 6106 states and 20734 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:09,316 INFO L93 Difference]: Finished difference Result 10811 states and 35555 transitions. [2021-07-13 20:16:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:16:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:09,337 INFO L225 Difference]: With dead ends: 10811 [2021-07-13 20:16:09,337 INFO L226 Difference]: Without dead ends: 10673 [2021-07-13 20:16:09,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1985.3ms TimeCoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:16:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-07-13 20:16:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6026. [2021-07-13 20:16:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 6025 states have (on average 3.388381742738589) internal successors, (20415), 6025 states have internal predecessors, (20415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 20415 transitions. [2021-07-13 20:16:09,472 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 20415 transitions. Word has length 36 [2021-07-13 20:16:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:09,473 INFO L482 AbstractCegarLoop]: Abstraction has 6026 states and 20415 transitions. [2021-07-13 20:16:09,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 20415 transitions. [2021-07-13 20:16:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:09,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:09,481 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:09,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 20:16:09,682 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1859447497, now seen corresponding path program 55 times [2021-07-13 20:16:09,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:09,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669954390] [2021-07-13 20:16:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:09,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669954390] [2021-07-13 20:16:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669954390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142338909] [2021-07-13 20:16:09,926 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 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 [2021-07-13 20:16:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:16:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:10,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142338909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:10,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:10,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:16:10,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219034750] [2021-07-13 20:16:10,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:10,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:10,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:10,686 INFO L87 Difference]: Start difference. First operand 6026 states and 20415 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:12,370 INFO L93 Difference]: Finished difference Result 8203 states and 27356 transitions. [2021-07-13 20:16:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:16:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:12,387 INFO L225 Difference]: With dead ends: 8203 [2021-07-13 20:16:12,387 INFO L226 Difference]: Without dead ends: 8083 [2021-07-13 20:16:12,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1599.7ms TimeCoverageRelationStatistics Valid=516, Invalid=2906, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:16:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-07-13 20:16:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 6014. [2021-07-13 20:16:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 3.389156826875104) internal successors, (20379), 6013 states have internal predecessors, (20379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 20379 transitions. [2021-07-13 20:16:12,548 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 20379 transitions. Word has length 36 [2021-07-13 20:16:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:12,548 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 20379 transitions. [2021-07-13 20:16:12,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 20379 transitions. [2021-07-13 20:16:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:12,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:12,557 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:12,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-07-13 20:16:12,758 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash 275705613, now seen corresponding path program 56 times [2021-07-13 20:16:12,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:12,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503468281] [2021-07-13 20:16:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:13,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503468281] [2021-07-13 20:16:13,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503468281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597882202] [2021-07-13 20:16:13,020 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 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 [2021-07-13 20:16:13,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:13,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:13,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:16:13,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597882202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:13,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:16:13,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025009141] [2021-07-13 20:16:13,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:13,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:13,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:13,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:13,741 INFO L87 Difference]: Start difference. First operand 6014 states and 20379 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:16,324 INFO L93 Difference]: Finished difference Result 10275 states and 33856 transitions. [2021-07-13 20:16:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:16:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:16,347 INFO L225 Difference]: With dead ends: 10275 [2021-07-13 20:16:16,347 INFO L226 Difference]: Without dead ends: 10168 [2021-07-13 20:16:16,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2263.9ms TimeCoverageRelationStatistics Valid=752, Invalid=4218, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:16:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2021-07-13 20:16:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 6096. [2021-07-13 20:16:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6096 states, 6095 states have (on average 3.3898277276456112) internal successors, (20661), 6095 states have internal predecessors, (20661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 20661 transitions. [2021-07-13 20:16:16,506 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 20661 transitions. Word has length 36 [2021-07-13 20:16:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:16,506 INFO L482 AbstractCegarLoop]: Abstraction has 6096 states and 20661 transitions. [2021-07-13 20:16:16,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 20661 transitions. [2021-07-13 20:16:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:16,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:16,516 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:16,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 20:16:16,717 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1878094875, now seen corresponding path program 57 times [2021-07-13 20:16:16,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:16,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143079270] [2021-07-13 20:16:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:16,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:16,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143079270] [2021-07-13 20:16:16,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143079270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:16,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816753277] [2021-07-13 20:16:16,986 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 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 [2021-07-13 20:16:17,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:16:17,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:16:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:17,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816753277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:17,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:17,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:16:17,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889761253] [2021-07-13 20:16:17,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:16:17,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:17,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:16:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:16:17,733 INFO L87 Difference]: Start difference. First operand 6096 states and 20661 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:20,175 INFO L93 Difference]: Finished difference Result 10916 states and 36194 transitions. [2021-07-13 20:16:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:16:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:20,202 INFO L225 Difference]: With dead ends: 10916 [2021-07-13 20:16:20,202 INFO L226 Difference]: Without dead ends: 10802 [2021-07-13 20:16:20,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2160.9ms TimeCoverageRelationStatistics Valid=676, Invalid=3880, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:16:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10802 states. [2021-07-13 20:16:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10802 to 6178. [2021-07-13 20:16:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 6177 states have (on average 3.3911283794722356) internal successors, (20947), 6177 states have internal predecessors, (20947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 20947 transitions. [2021-07-13 20:16:20,371 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 20947 transitions. Word has length 36 [2021-07-13 20:16:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:20,371 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 20947 transitions. [2021-07-13 20:16:20,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 20947 transitions. [2021-07-13 20:16:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:20,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:20,381 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:20,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-07-13 20:16:20,582 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1026502771, now seen corresponding path program 58 times [2021-07-13 20:16:20,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:20,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146127015] [2021-07-13 20:16:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:20,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:20,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146127015] [2021-07-13 20:16:20,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146127015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:20,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661110408] [2021-07-13 20:16:20,843 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 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 [2021-07-13 20:16:20,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:20,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:20,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:16:20,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:21,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661110408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:21,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:21,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:16:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27649328] [2021-07-13 20:16:21,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:21,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:21,738 INFO L87 Difference]: Start difference. First operand 6178 states and 20947 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:23,523 INFO L93 Difference]: Finished difference Result 12093 states and 40336 transitions. [2021-07-13 20:16:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:23,553 INFO L225 Difference]: With dead ends: 12093 [2021-07-13 20:16:23,554 INFO L226 Difference]: Without dead ends: 11973 [2021-07-13 20:16:23,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1762.5ms TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:16:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11973 states. [2021-07-13 20:16:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11973 to 6170. [2021-07-13 20:16:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6169 states have (on average 3.3916355973415464) internal successors, (20923), 6169 states have internal predecessors, (20923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 20923 transitions. [2021-07-13 20:16:23,723 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 20923 transitions. Word has length 36 [2021-07-13 20:16:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:23,723 INFO L482 AbstractCegarLoop]: Abstraction has 6170 states and 20923 transitions. [2021-07-13 20:16:23,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 20923 transitions. [2021-07-13 20:16:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:23,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:23,733 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:23,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:23,934 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash -263198391, now seen corresponding path program 59 times [2021-07-13 20:16:23,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:23,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204568299] [2021-07-13 20:16:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:24,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:24,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204568299] [2021-07-13 20:16:24,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204568299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:24,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575687381] [2021-07-13 20:16:24,271 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 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 [2021-07-13 20:16:24,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:16:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:16:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:25,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575687381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:25,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:25,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:16:25,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141986973] [2021-07-13 20:16:25,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:25,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:25,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:25,164 INFO L87 Difference]: Start difference. First operand 6170 states and 20923 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:26,726 INFO L93 Difference]: Finished difference Result 9747 states and 32350 transitions. [2021-07-13 20:16:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:26,747 INFO L225 Difference]: With dead ends: 9747 [2021-07-13 20:16:26,747 INFO L226 Difference]: Without dead ends: 9652 [2021-07-13 20:16:26,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1675.5ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:16:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9652 states. [2021-07-13 20:16:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9652 to 5856. [2021-07-13 20:16:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5856 states, 5855 states have (on average 3.378479931682323) internal successors, (19781), 5855 states have internal predecessors, (19781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5856 states to 5856 states and 19781 transitions. [2021-07-13 20:16:26,886 INFO L78 Accepts]: Start accepts. Automaton has 5856 states and 19781 transitions. Word has length 36 [2021-07-13 20:16:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:26,886 INFO L482 AbstractCegarLoop]: Abstraction has 5856 states and 19781 transitions. [2021-07-13 20:16:26,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5856 states and 19781 transitions. [2021-07-13 20:16:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:26,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:26,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:27,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 20:16:27,102 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash 454369609, now seen corresponding path program 60 times [2021-07-13 20:16:27,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:27,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418585819] [2021-07-13 20:16:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:27,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:27,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418585819] [2021-07-13 20:16:27,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418585819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:27,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426759999] [2021-07-13 20:16:27,375 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 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 [2021-07-13 20:16:27,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:16:27,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:16:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426759999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:28,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:28,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:16:28,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198158303] [2021-07-13 20:16:28,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:28,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:28,117 INFO L87 Difference]: Start difference. First operand 5856 states and 19781 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:30,286 INFO L93 Difference]: Finished difference Result 11290 states and 37077 transitions. [2021-07-13 20:16:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:16:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:30,312 INFO L225 Difference]: With dead ends: 11290 [2021-07-13 20:16:30,312 INFO L226 Difference]: Without dead ends: 11152 [2021-07-13 20:16:30,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2047.1ms TimeCoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:16:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11152 states. [2021-07-13 20:16:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11152 to 5646. [2021-07-13 20:16:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 5645 states have (on average 3.3610274579273693) internal successors, (18973), 5645 states have internal predecessors, (18973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 18973 transitions. [2021-07-13 20:16:30,460 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 18973 transitions. Word has length 36 [2021-07-13 20:16:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:30,460 INFO L482 AbstractCegarLoop]: Abstraction has 5646 states and 18973 transitions. [2021-07-13 20:16:30,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 18973 transitions. [2021-07-13 20:16:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:30,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:30,469 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:30,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-13 20:16:30,669 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1364840307, now seen corresponding path program 61 times [2021-07-13 20:16:30,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:30,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980437649] [2021-07-13 20:16:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:30,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:30,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980437649] [2021-07-13 20:16:30,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980437649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:30,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304832866] [2021-07-13 20:16:30,947 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 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 [2021-07-13 20:16:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:16:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:31,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304832866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:31,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:31,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:16:31,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922205999] [2021-07-13 20:16:31,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:16:31,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:16:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:16:31,689 INFO L87 Difference]: Start difference. First operand 5646 states and 18973 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:33,494 INFO L93 Difference]: Finished difference Result 8759 states and 29052 transitions. [2021-07-13 20:16:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:16:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:33,512 INFO L225 Difference]: With dead ends: 8759 [2021-07-13 20:16:33,512 INFO L226 Difference]: Without dead ends: 8639 [2021-07-13 20:16:33,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1708.1ms TimeCoverageRelationStatistics Valid=534, Invalid=3248, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:16:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2021-07-13 20:16:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 5542. [2021-07-13 20:16:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5542 states, 5541 states have (on average 3.3598628406424833) internal successors, (18617), 5541 states have internal predecessors, (18617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5542 states to 5542 states and 18617 transitions. [2021-07-13 20:16:33,629 INFO L78 Accepts]: Start accepts. Automaton has 5542 states and 18617 transitions. Word has length 36 [2021-07-13 20:16:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:33,629 INFO L482 AbstractCegarLoop]: Abstraction has 5542 states and 18617 transitions. [2021-07-13 20:16:33,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5542 states and 18617 transitions. [2021-07-13 20:16:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:33,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:33,637 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:33,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-13 20:16:33,838 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash 596684445, now seen corresponding path program 62 times [2021-07-13 20:16:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:33,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539226266] [2021-07-13 20:16:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:34,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:34,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539226266] [2021-07-13 20:16:34,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539226266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:34,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366135359] [2021-07-13 20:16:34,095 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 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 [2021-07-13 20:16:34,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:34,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:34,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:16:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:34,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366135359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:34,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:34,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:16:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794181777] [2021-07-13 20:16:34,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:16:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:16:34,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:16:34,762 INFO L87 Difference]: Start difference. First operand 5542 states and 18617 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:37,119 INFO L93 Difference]: Finished difference Result 11413 states and 38103 transitions. [2021-07-13 20:16:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:16:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:37,144 INFO L225 Difference]: With dead ends: 11413 [2021-07-13 20:16:37,144 INFO L226 Difference]: Without dead ends: 11293 [2021-07-13 20:16:37,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2100.6ms TimeCoverageRelationStatistics Valid=689, Invalid=3343, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:16:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11293 states. [2021-07-13 20:16:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11293 to 5710. [2021-07-13 20:16:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 3.3639866876861095) internal successors, (19205), 5709 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 19205 transitions. [2021-07-13 20:16:37,297 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 19205 transitions. Word has length 36 [2021-07-13 20:16:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:37,297 INFO L482 AbstractCegarLoop]: Abstraction has 5710 states and 19205 transitions. [2021-07-13 20:16:37,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 19205 transitions. [2021-07-13 20:16:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:37,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:37,336 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:37,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:37,536 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1758359141, now seen corresponding path program 63 times [2021-07-13 20:16:37,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:37,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528310037] [2021-07-13 20:16:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:16:37,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:37,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528310037] [2021-07-13 20:16:37,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528310037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:37,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956450867] [2021-07-13 20:16:37,939 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 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 [2021-07-13 20:16:37,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:16:37,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:16:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956450867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:38,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:38,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:16:38,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897245637] [2021-07-13 20:16:38,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:16:38,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:16:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:16:38,603 INFO L87 Difference]: Start difference. First operand 5710 states and 19205 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:40,638 INFO L93 Difference]: Finished difference Result 6931 states and 22716 transitions. [2021-07-13 20:16:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:40,639 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:40,651 INFO L225 Difference]: With dead ends: 6931 [2021-07-13 20:16:40,651 INFO L226 Difference]: Without dead ends: 6824 [2021-07-13 20:16:40,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1883.4ms TimeCoverageRelationStatistics Valid=460, Invalid=2962, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:16:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-07-13 20:16:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 5770. [2021-07-13 20:16:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5770 states, 5769 states have (on average 3.3615877968452073) internal successors, (19393), 5769 states have internal predecessors, (19393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 19393 transitions. [2021-07-13 20:16:40,746 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 19393 transitions. Word has length 36 [2021-07-13 20:16:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:40,746 INFO L482 AbstractCegarLoop]: Abstraction has 5770 states and 19393 transitions. [2021-07-13 20:16:40,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 19393 transitions. [2021-07-13 20:16:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:40,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:40,754 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:40,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-13 20:16:40,954 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1168692123, now seen corresponding path program 64 times [2021-07-13 20:16:40,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:40,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393956667] [2021-07-13 20:16:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:16:41,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:41,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393956667] [2021-07-13 20:16:41,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393956667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:41,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139283219] [2021-07-13 20:16:41,213 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 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 [2021-07-13 20:16:41,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:41,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:16:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:41,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139283219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:41,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:41,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:16:41,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869742125] [2021-07-13 20:16:41,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:41,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:41,852 INFO L87 Difference]: Start difference. First operand 5770 states and 19393 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:43,171 INFO L93 Difference]: Finished difference Result 6434 states and 21120 transitions. [2021-07-13 20:16:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:16:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:43,183 INFO L225 Difference]: With dead ends: 6434 [2021-07-13 20:16:43,183 INFO L226 Difference]: Without dead ends: 6238 [2021-07-13 20:16:43,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1455.4ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:16:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-07-13 20:16:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5850. [2021-07-13 20:16:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 5849 states have (on average 3.34980338519405) internal successors, (19593), 5849 states have internal predecessors, (19593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 19593 transitions. [2021-07-13 20:16:43,271 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 19593 transitions. Word has length 36 [2021-07-13 20:16:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:43,272 INFO L482 AbstractCegarLoop]: Abstraction has 5850 states and 19593 transitions. [2021-07-13 20:16:43,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 19593 transitions. [2021-07-13 20:16:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:43,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:43,279 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:43,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:43,480 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1710959515, now seen corresponding path program 65 times [2021-07-13 20:16:43,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:43,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780196345] [2021-07-13 20:16:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:43,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780196345] [2021-07-13 20:16:43,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780196345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983401752] [2021-07-13 20:16:43,800 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 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 [2021-07-13 20:16:43,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:16:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:16:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:44,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983401752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:44,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:44,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:16:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345601360] [2021-07-13 20:16:44,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:16:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:16:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:16:44,505 INFO L87 Difference]: Start difference. First operand 5850 states and 19593 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:46,472 INFO L93 Difference]: Finished difference Result 9004 states and 28798 transitions. [2021-07-13 20:16:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:16:46,472 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:46,488 INFO L225 Difference]: With dead ends: 9004 [2021-07-13 20:16:46,488 INFO L226 Difference]: Without dead ends: 8808 [2021-07-13 20:16:46,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1979.5ms TimeCoverageRelationStatistics Valid=733, Invalid=4379, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:16:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8808 states. [2021-07-13 20:16:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8808 to 5858. [2021-07-13 20:16:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 5857 states have (on average 3.3517158955096464) internal successors, (19631), 5857 states have internal predecessors, (19631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 19631 transitions. [2021-07-13 20:16:46,612 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 19631 transitions. Word has length 36 [2021-07-13 20:16:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:46,612 INFO L482 AbstractCegarLoop]: Abstraction has 5858 states and 19631 transitions. [2021-07-13 20:16:46,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 19631 transitions. [2021-07-13 20:16:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:46,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:46,620 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:46,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-13 20:16:46,821 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1479251937, now seen corresponding path program 66 times [2021-07-13 20:16:46,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:46,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338563603] [2021-07-13 20:16:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:47,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:47,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338563603] [2021-07-13 20:16:47,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338563603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:47,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777920385] [2021-07-13 20:16:47,059 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 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 [2021-07-13 20:16:47,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:16:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:16:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:47,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777920385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:47,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:47,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:16:47,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826734020] [2021-07-13 20:16:47,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:16:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:16:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:16:47,640 INFO L87 Difference]: Start difference. First operand 5858 states and 19631 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:52,957 INFO L93 Difference]: Finished difference Result 9736 states and 31024 transitions. [2021-07-13 20:16:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:16:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:52,974 INFO L225 Difference]: With dead ends: 9736 [2021-07-13 20:16:52,974 INFO L226 Difference]: Without dead ends: 9471 [2021-07-13 20:16:52,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3742.5ms TimeCoverageRelationStatistics Valid=1169, Invalid=10173, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:16:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9471 states. [2021-07-13 20:16:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9471 to 5808. [2021-07-13 20:16:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5808 states, 5807 states have (on average 3.3643878078181504) internal successors, (19537), 5807 states have internal predecessors, (19537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5808 states to 5808 states and 19537 transitions. [2021-07-13 20:16:53,083 INFO L78 Accepts]: Start accepts. Automaton has 5808 states and 19537 transitions. Word has length 36 [2021-07-13 20:16:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:53,083 INFO L482 AbstractCegarLoop]: Abstraction has 5808 states and 19537 transitions. [2021-07-13 20:16:53,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5808 states and 19537 transitions. [2021-07-13 20:16:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:53,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:53,091 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:53,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable593 [2021-07-13 20:16:53,292 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1492941925, now seen corresponding path program 67 times [2021-07-13 20:16:53,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:53,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422743680] [2021-07-13 20:16:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:53,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422743680] [2021-07-13 20:16:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422743680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724567592] [2021-07-13 20:16:53,570 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 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 [2021-07-13 20:16:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:16:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724567592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:16:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807480222] [2021-07-13 20:16:54,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:16:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:16:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:16:54,249 INFO L87 Difference]: Start difference. First operand 5808 states and 19537 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:57,216 INFO L93 Difference]: Finished difference Result 10782 states and 34224 transitions. [2021-07-13 20:16:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:16:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:16:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:57,237 INFO L225 Difference]: With dead ends: 10782 [2021-07-13 20:16:57,238 INFO L226 Difference]: Without dead ends: 10528 [2021-07-13 20:16:57,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2676.7ms TimeCoverageRelationStatistics Valid=1007, Invalid=6649, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:16:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-07-13 20:16:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 5832. [2021-07-13 20:16:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.364602984050763) internal successors, (19619), 5831 states have internal predecessors, (19619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19619 transitions. [2021-07-13 20:16:57,359 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19619 transitions. Word has length 36 [2021-07-13 20:16:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:57,359 INFO L482 AbstractCegarLoop]: Abstraction has 5832 states and 19619 transitions. [2021-07-13 20:16:57,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19619 transitions. [2021-07-13 20:16:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:16:57,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:57,368 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:57,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-13 20:16:57,568 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1796517217, now seen corresponding path program 68 times [2021-07-13 20:16:57,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:57,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323030500] [2021-07-13 20:16:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:57,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:57,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323030500] [2021-07-13 20:16:57,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323030500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:57,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760669093] [2021-07-13 20:16:57,865 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 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 [2021-07-13 20:16:57,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:16:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:58,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760669093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:58,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:58,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:16:58,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980457006] [2021-07-13 20:16:58,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:58,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:58,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:58,516 INFO L87 Difference]: Start difference. First operand 5832 states and 19619 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:04,810 INFO L93 Difference]: Finished difference Result 11579 states and 36649 transitions. [2021-07-13 20:17:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 20:17:04,810 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:04,832 INFO L225 Difference]: With dead ends: 11579 [2021-07-13 20:17:04,832 INFO L226 Difference]: Without dead ends: 11330 [2021-07-13 20:17:04,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4927 ImplicationChecksByTransitivity, 4634.0ms TimeCoverageRelationStatistics Valid=1570, Invalid=12950, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:17:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11330 states. [2021-07-13 20:17:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11330 to 5885. [2021-07-13 20:17:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5885 states, 5884 states have (on average 3.3664174031271243) internal successors, (19808), 5884 states have internal predecessors, (19808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5885 states to 5885 states and 19808 transitions. [2021-07-13 20:17:04,974 INFO L78 Accepts]: Start accepts. Automaton has 5885 states and 19808 transitions. Word has length 36 [2021-07-13 20:17:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:04,974 INFO L482 AbstractCegarLoop]: Abstraction has 5885 states and 19808 transitions. [2021-07-13 20:17:04,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5885 states and 19808 transitions. [2021-07-13 20:17:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:04,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:04,983 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:05,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:05,184 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2064227935, now seen corresponding path program 69 times [2021-07-13 20:17:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:05,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050487264] [2021-07-13 20:17:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:05,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:05,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050487264] [2021-07-13 20:17:05,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050487264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:05,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676259569] [2021-07-13 20:17:05,602 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 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 [2021-07-13 20:17:05,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:17:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:05,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:17:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676259569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:06,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:06,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:17:06,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486484730] [2021-07-13 20:17:06,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:17:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:06,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:17:06,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:17:06,256 INFO L87 Difference]: Start difference. First operand 5885 states and 19808 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:08,418 INFO L93 Difference]: Finished difference Result 7906 states and 25610 transitions. [2021-07-13 20:17:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:17:08,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:08,434 INFO L225 Difference]: With dead ends: 7906 [2021-07-13 20:17:08,434 INFO L226 Difference]: Without dead ends: 7799 [2021-07-13 20:17:08,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1968.2ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:17:08,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-07-13 20:17:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 6005. [2021-07-13 20:17:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6004 states have (on average 3.358427714856762) internal successors, (20164), 6004 states have internal predecessors, (20164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 20164 transitions. [2021-07-13 20:17:08,558 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 20164 transitions. Word has length 36 [2021-07-13 20:17:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:08,559 INFO L482 AbstractCegarLoop]: Abstraction has 6005 states and 20164 transitions. [2021-07-13 20:17:08,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 20164 transitions. [2021-07-13 20:17:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:08,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:08,568 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:08,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable605 [2021-07-13 20:17:08,768 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:08,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1392812193, now seen corresponding path program 70 times [2021-07-13 20:17:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:08,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370224493] [2021-07-13 20:17:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:09,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:09,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370224493] [2021-07-13 20:17:09,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370224493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:09,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468109639] [2021-07-13 20:17:09,084 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 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 [2021-07-13 20:17:09,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:17:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468109639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:09,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:09,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:17:09,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552840065] [2021-07-13 20:17:09,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:09,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:09,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:09,715 INFO L87 Difference]: Start difference. First operand 6005 states and 20164 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:12,003 INFO L93 Difference]: Finished difference Result 7193 states and 23300 transitions. [2021-07-13 20:17:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:17:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:12,019 INFO L225 Difference]: With dead ends: 7193 [2021-07-13 20:17:12,019 INFO L226 Difference]: Without dead ends: 7058 [2021-07-13 20:17:12,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 2195.6ms TimeCoverageRelationStatistics Valid=742, Invalid=4808, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:17:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7058 states. [2021-07-13 20:17:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7058 to 6063. [2021-07-13 20:17:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 6062 states have (on average 3.3525239194985152) internal successors, (20323), 6062 states have internal predecessors, (20323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 20323 transitions. [2021-07-13 20:17:12,185 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 20323 transitions. Word has length 36 [2021-07-13 20:17:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:12,186 INFO L482 AbstractCegarLoop]: Abstraction has 6063 states and 20323 transitions. [2021-07-13 20:17:12,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 20323 transitions. [2021-07-13 20:17:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:12,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:12,196 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:12,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:12,397 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -696311903, now seen corresponding path program 71 times [2021-07-13 20:17:12,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:12,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288778802] [2021-07-13 20:17:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:12,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:12,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288778802] [2021-07-13 20:17:12,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288778802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:12,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622738515] [2021-07-13 20:17:12,729 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 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 [2021-07-13 20:17:12,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:17:12,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:17:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:13,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622738515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:13,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:13,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:17:13,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798595447] [2021-07-13 20:17:13,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:13,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:13,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:13,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:13,343 INFO L87 Difference]: Start difference. First operand 6063 states and 20323 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:16,245 INFO L93 Difference]: Finished difference Result 7335 states and 23715 transitions. [2021-07-13 20:17:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:17:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:16,259 INFO L225 Difference]: With dead ends: 7335 [2021-07-13 20:17:16,259 INFO L226 Difference]: Without dead ends: 7260 [2021-07-13 20:17:16,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 2659.7ms TimeCoverageRelationStatistics Valid=887, Invalid=5593, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:17:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7260 states. [2021-07-13 20:17:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7260 to 6171. [2021-07-13 20:17:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6171 states, 6170 states have (on average 3.344246353322528) internal successors, (20634), 6170 states have internal predecessors, (20634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 20634 transitions. [2021-07-13 20:17:16,373 INFO L78 Accepts]: Start accepts. Automaton has 6171 states and 20634 transitions. Word has length 36 [2021-07-13 20:17:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:16,373 INFO L482 AbstractCegarLoop]: Abstraction has 6171 states and 20634 transitions. [2021-07-13 20:17:16,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6171 states and 20634 transitions. [2021-07-13 20:17:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:16,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:16,382 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:16,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-07-13 20:17:16,583 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:16,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1070891677, now seen corresponding path program 72 times [2021-07-13 20:17:16,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:16,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243165547] [2021-07-13 20:17:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:16,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243165547] [2021-07-13 20:17:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243165547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93673084] [2021-07-13 20:17:16,945 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 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 [2021-07-13 20:17:16,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:17:16,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:17:16,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93673084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:17:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859187795] [2021-07-13 20:17:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:17,643 INFO L87 Difference]: Start difference. First operand 6171 states and 20634 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:21,557 INFO L93 Difference]: Finished difference Result 8255 states and 26426 transitions. [2021-07-13 20:17:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:17:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:21,573 INFO L225 Difference]: With dead ends: 8255 [2021-07-13 20:17:21,573 INFO L226 Difference]: Without dead ends: 8074 [2021-07-13 20:17:21,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 3224.0ms TimeCoverageRelationStatistics Valid=1010, Invalid=7546, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:17:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-07-13 20:17:21,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 6189. [2021-07-13 20:17:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 3.348901098901099) internal successors, (20723), 6188 states have internal predecessors, (20723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 20723 transitions. [2021-07-13 20:17:21,719 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 20723 transitions. Word has length 36 [2021-07-13 20:17:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:21,720 INFO L482 AbstractCegarLoop]: Abstraction has 6189 states and 20723 transitions. [2021-07-13 20:17:21,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 20723 transitions. [2021-07-13 20:17:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:21,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:21,729 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:21,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:21,930 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1787377759, now seen corresponding path program 73 times [2021-07-13 20:17:21,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:21,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725445685] [2021-07-13 20:17:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:22,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725445685] [2021-07-13 20:17:22,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725445685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925285382] [2021-07-13 20:17:22,253 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 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 [2021-07-13 20:17:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:17:22,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:22,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925285382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:22,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:22,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:17:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824921297] [2021-07-13 20:17:22,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:22,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:22,929 INFO L87 Difference]: Start difference. First operand 6189 states and 20723 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:27,793 INFO L93 Difference]: Finished difference Result 9960 states and 31523 transitions. [2021-07-13 20:17:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:17:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:27,811 INFO L225 Difference]: With dead ends: 9960 [2021-07-13 20:17:27,811 INFO L226 Difference]: Without dead ends: 9784 [2021-07-13 20:17:27,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4424.0ms TimeCoverageRelationStatistics Valid=1469, Invalid=10303, Unknown=0, NotChecked=0, Total=11772 [2021-07-13 20:17:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9784 states. [2021-07-13 20:17:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9784 to 6221. [2021-07-13 20:17:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 6220 states have (on average 3.352572347266881) internal successors, (20853), 6220 states have internal predecessors, (20853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 20853 transitions. [2021-07-13 20:17:27,939 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 20853 transitions. Word has length 36 [2021-07-13 20:17:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:27,939 INFO L482 AbstractCegarLoop]: Abstraction has 6221 states and 20853 transitions. [2021-07-13 20:17:27,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 20853 transitions. [2021-07-13 20:17:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:27,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:27,949 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:28,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-07-13 20:17:28,149 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1483802467, now seen corresponding path program 74 times [2021-07-13 20:17:28,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:28,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280371325] [2021-07-13 20:17:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:28,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280371325] [2021-07-13 20:17:28,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280371325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001433479] [2021-07-13 20:17:28,460 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 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 [2021-07-13 20:17:28,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:28,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:28,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:17:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:29,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001433479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:29,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:29,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-07-13 20:17:29,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313461479] [2021-07-13 20:17:29,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:29,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:29,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:29,138 INFO L87 Difference]: Start difference. First operand 6221 states and 20853 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:35,582 INFO L93 Difference]: Finished difference Result 11583 states and 36494 transitions. [2021-07-13 20:17:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:17:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:35,603 INFO L225 Difference]: With dead ends: 11583 [2021-07-13 20:17:35,603 INFO L226 Difference]: Without dead ends: 11362 [2021-07-13 20:17:35,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5373 ImplicationChecksByTransitivity, 5267.8ms TimeCoverageRelationStatistics Valid=1885, Invalid=13865, Unknown=0, NotChecked=0, Total=15750 [2021-07-13 20:17:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-07-13 20:17:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 6259. [2021-07-13 20:17:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6259 states, 6258 states have (on average 3.3557046979865772) internal successors, (21000), 6258 states have internal predecessors, (21000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 21000 transitions. [2021-07-13 20:17:35,765 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 21000 transitions. Word has length 36 [2021-07-13 20:17:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:35,765 INFO L482 AbstractCegarLoop]: Abstraction has 6259 states and 21000 transitions. [2021-07-13 20:17:35,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 21000 transitions. [2021-07-13 20:17:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:35,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:35,774 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:35,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:35,975 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash 382814025, now seen corresponding path program 75 times [2021-07-13 20:17:35,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:35,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903475793] [2021-07-13 20:17:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:36,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903475793] [2021-07-13 20:17:36,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903475793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739134704] [2021-07-13 20:17:36,370 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 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 [2021-07-13 20:17:36,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:17:36,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:17:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:37,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739134704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:37,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:37,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:17:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390277654] [2021-07-13 20:17:37,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:17:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:17:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:17:37,027 INFO L87 Difference]: Start difference. First operand 6259 states and 21000 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:39,294 INFO L93 Difference]: Finished difference Result 8672 states and 27998 transitions. [2021-07-13 20:17:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:17:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:39,310 INFO L225 Difference]: With dead ends: 8672 [2021-07-13 20:17:39,310 INFO L226 Difference]: Without dead ends: 8565 [2021-07-13 20:17:39,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2159.4ms TimeCoverageRelationStatistics Valid=563, Invalid=3597, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:17:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-07-13 20:17:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 6313. [2021-07-13 20:17:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6312 states have (on average 3.3542458808618503) internal successors, (21172), 6312 states have internal predecessors, (21172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 21172 transitions. [2021-07-13 20:17:39,424 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 21172 transitions. Word has length 36 [2021-07-13 20:17:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:39,424 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 21172 transitions. [2021-07-13 20:17:39,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 21172 transitions. [2021-07-13 20:17:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:39,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:39,433 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:39,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-07-13 20:17:39,634 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash -455113143, now seen corresponding path program 76 times [2021-07-13 20:17:39,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:39,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928686738] [2021-07-13 20:17:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:39,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928686738] [2021-07-13 20:17:39,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928686738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469931728] [2021-07-13 20:17:39,933 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 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 [2021-07-13 20:17:39,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:17:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:40,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469931728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:40,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:40,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:17:40,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023510027] [2021-07-13 20:17:40,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:40,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:40,581 INFO L87 Difference]: Start difference. First operand 6313 states and 21172 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:43,579 INFO L93 Difference]: Finished difference Result 8419 states and 26898 transitions. [2021-07-13 20:17:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:17:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:43,594 INFO L225 Difference]: With dead ends: 8419 [2021-07-13 20:17:43,594 INFO L226 Difference]: Without dead ends: 8284 [2021-07-13 20:17:43,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2630.1ms TimeCoverageRelationStatistics Valid=918, Invalid=5888, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:17:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-07-13 20:17:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 6303. [2021-07-13 20:17:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6302 states have (on average 3.3576642335766422) internal successors, (21160), 6302 states have internal predecessors, (21160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 21160 transitions. [2021-07-13 20:17:43,710 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 21160 transitions. Word has length 36 [2021-07-13 20:17:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:43,710 INFO L482 AbstractCegarLoop]: Abstraction has 6303 states and 21160 transitions. [2021-07-13 20:17:43,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 21160 transitions. [2021-07-13 20:17:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:43,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:43,720 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:43,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:43,920 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash 284308813, now seen corresponding path program 77 times [2021-07-13 20:17:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:43,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415432955] [2021-07-13 20:17:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:44,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415432955] [2021-07-13 20:17:44,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415432955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051134953] [2021-07-13 20:17:44,218 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 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 [2021-07-13 20:17:44,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:17:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:17:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:44,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051134953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:44,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:44,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:17:44,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180153334] [2021-07-13 20:17:44,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:44,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:44,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:44,936 INFO L87 Difference]: Start difference. First operand 6303 states and 21160 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:50,371 INFO L93 Difference]: Finished difference Result 10875 states and 34405 transitions. [2021-07-13 20:17:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-13 20:17:50,372 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:50,391 INFO L225 Difference]: With dead ends: 10875 [2021-07-13 20:17:50,391 INFO L226 Difference]: Without dead ends: 10726 [2021-07-13 20:17:50,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 5102.2ms TimeCoverageRelationStatistics Valid=1864, Invalid=12178, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:17:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2021-07-13 20:17:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 6331. [2021-07-13 20:17:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 3.36129541864139) internal successors, (21277), 6330 states have internal predecessors, (21277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 21277 transitions. [2021-07-13 20:17:50,524 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 21277 transitions. Word has length 36 [2021-07-13 20:17:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:50,525 INFO L482 AbstractCegarLoop]: Abstraction has 6331 states and 21277 transitions. [2021-07-13 20:17:50,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 21277 transitions. [2021-07-13 20:17:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:50,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:50,534 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:50,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-13 20:17:50,735 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1276802377, now seen corresponding path program 78 times [2021-07-13 20:17:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:50,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166275548] [2021-07-13 20:17:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:51,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166275548] [2021-07-13 20:17:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166275548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126114300] [2021-07-13 20:17:51,041 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 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 [2021-07-13 20:17:51,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:17:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:17:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:51,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126114300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:51,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:51,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:17:51,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490443608] [2021-07-13 20:17:51,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:51,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:51,663 INFO L87 Difference]: Start difference. First operand 6331 states and 21277 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:57,993 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-13 20:17:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:58,474 INFO L93 Difference]: Finished difference Result 12657 states and 39981 transitions. [2021-07-13 20:17:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-13 20:17:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:17:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:58,500 INFO L225 Difference]: With dead ends: 12657 [2021-07-13 20:17:58,500 INFO L226 Difference]: Without dead ends: 12476 [2021-07-13 20:17:58,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6155 ImplicationChecksByTransitivity, 5799.5ms TimeCoverageRelationStatistics Valid=2252, Invalid=14778, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:17:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12476 states. [2021-07-13 20:17:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12476 to 6337. [2021-07-13 20:17:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 6336 states have (on average 3.3630050505050506) internal successors, (21308), 6336 states have internal predecessors, (21308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 21308 transitions. [2021-07-13 20:17:58,701 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 21308 transitions. Word has length 36 [2021-07-13 20:17:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:58,702 INFO L482 AbstractCegarLoop]: Abstraction has 6337 states and 21308 transitions. [2021-07-13 20:17:58,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 21308 transitions. [2021-07-13 20:17:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:17:58,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:58,712 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:58,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-13 20:17:58,913 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash -156963695, now seen corresponding path program 79 times [2021-07-13 20:17:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274309443] [2021-07-13 20:17:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:59,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274309443] [2021-07-13 20:17:59,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274309443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479306231] [2021-07-13 20:17:59,284 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 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 [2021-07-13 20:17:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:17:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:00,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479306231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:00,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:00,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:18:00,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449777493] [2021-07-13 20:18:00,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:18:00,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:18:00,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:18:00,076 INFO L87 Difference]: Start difference. First operand 6337 states and 21308 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:03,052 INFO L93 Difference]: Finished difference Result 11404 states and 37120 transitions. [2021-07-13 20:18:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:18:03,052 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:03,083 INFO L225 Difference]: With dead ends: 11404 [2021-07-13 20:18:03,083 INFO L226 Difference]: Without dead ends: 11309 [2021-07-13 20:18:03,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 3018.5ms TimeCoverageRelationStatistics Valid=1114, Invalid=5692, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:18:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11309 states. [2021-07-13 20:18:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11309 to 6425. [2021-07-13 20:18:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 6424 states have (on average 3.366282689912827) internal successors, (21625), 6424 states have internal predecessors, (21625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 21625 transitions. [2021-07-13 20:18:03,280 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 21625 transitions. Word has length 36 [2021-07-13 20:18:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:03,280 INFO L482 AbstractCegarLoop]: Abstraction has 6425 states and 21625 transitions. [2021-07-13 20:18:03,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 21625 transitions. [2021-07-13 20:18:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:03,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:03,290 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:03,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:03,490 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:03,491 INFO L82 PathProgramCache]: Analyzing trace with hash 764738445, now seen corresponding path program 80 times [2021-07-13 20:18:03,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:03,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013203637] [2021-07-13 20:18:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:03,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013203637] [2021-07-13 20:18:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013203637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608250930] [2021-07-13 20:18:03,882 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 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 [2021-07-13 20:18:03,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:03,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:03,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:04,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608250930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:04,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:04,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:18:04,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900849786] [2021-07-13 20:18:04,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:18:04,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:04,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:18:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:18:04,510 INFO L87 Difference]: Start difference. First operand 6425 states and 21625 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:07,486 INFO L93 Difference]: Finished difference Result 12482 states and 40625 transitions. [2021-07-13 20:18:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:18:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:07,512 INFO L225 Difference]: With dead ends: 12482 [2021-07-13 20:18:07,512 INFO L226 Difference]: Without dead ends: 12362 [2021-07-13 20:18:07,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2760.2ms TimeCoverageRelationStatistics Valid=1043, Invalid=4809, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:18:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states. [2021-07-13 20:18:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12362 to 6308. [2021-07-13 20:18:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6308 states, 6307 states have (on average 3.3624544157285556) internal successors, (21207), 6307 states have internal predecessors, (21207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6308 states to 6308 states and 21207 transitions. [2021-07-13 20:18:07,715 INFO L78 Accepts]: Start accepts. Automaton has 6308 states and 21207 transitions. Word has length 36 [2021-07-13 20:18:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:07,715 INFO L482 AbstractCegarLoop]: Abstraction has 6308 states and 21207 transitions. [2021-07-13 20:18:07,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6308 states and 21207 transitions. [2021-07-13 20:18:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:07,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:07,724 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:07,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:07,924 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1489775885, now seen corresponding path program 81 times [2021-07-13 20:18:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:07,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778946409] [2021-07-13 20:18:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:08,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778946409] [2021-07-13 20:18:08,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778946409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727529438] [2021-07-13 20:18:08,278 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 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 [2021-07-13 20:18:08,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:18:08,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:08,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727529438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:08,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:08,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:18:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114452649] [2021-07-13 20:18:08,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:18:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:18:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:18:08,873 INFO L87 Difference]: Start difference. First operand 6308 states and 21207 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:10,045 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 20:18:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:10,256 INFO L93 Difference]: Finished difference Result 8640 states and 28461 transitions. [2021-07-13 20:18:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:18:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:10,271 INFO L225 Difference]: With dead ends: 8640 [2021-07-13 20:18:10,272 INFO L226 Difference]: Without dead ends: 8520 [2021-07-13 20:18:10,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1546.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2089, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:18:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8520 states. [2021-07-13 20:18:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8520 to 6322. [2021-07-13 20:18:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6322 states, 6321 states have (on average 3.3616516373991456) internal successors, (21249), 6321 states have internal predecessors, (21249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6322 states to 6322 states and 21249 transitions. [2021-07-13 20:18:10,379 INFO L78 Accepts]: Start accepts. Automaton has 6322 states and 21249 transitions. Word has length 36 [2021-07-13 20:18:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:10,379 INFO L482 AbstractCegarLoop]: Abstraction has 6322 states and 21249 transitions. [2021-07-13 20:18:10,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6322 states and 21249 transitions. [2021-07-13 20:18:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:10,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:10,388 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:10,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:10,588 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash -83145439, now seen corresponding path program 82 times [2021-07-13 20:18:10,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:10,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195268261] [2021-07-13 20:18:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:10,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:10,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195268261] [2021-07-13 20:18:10,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195268261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:10,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291205000] [2021-07-13 20:18:10,860 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 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 [2021-07-13 20:18:10,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291205000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:11,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:11,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:18:11,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683173661] [2021-07-13 20:18:11,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:11,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:11,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:11,445 INFO L87 Difference]: Start difference. First operand 6322 states and 21249 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:13,769 INFO L93 Difference]: Finished difference Result 8018 states and 25933 transitions. [2021-07-13 20:18:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:18:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:13,788 INFO L225 Difference]: With dead ends: 8018 [2021-07-13 20:18:13,788 INFO L226 Difference]: Without dead ends: 7857 [2021-07-13 20:18:13,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2042.1ms TimeCoverageRelationStatistics Valid=634, Invalid=4058, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:18:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2021-07-13 20:18:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6384. [2021-07-13 20:18:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 3.363152122826257) internal successors, (21467), 6383 states have internal predecessors, (21467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 21467 transitions. [2021-07-13 20:18:13,924 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 21467 transitions. Word has length 36 [2021-07-13 20:18:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:13,924 INFO L482 AbstractCegarLoop]: Abstraction has 6384 states and 21467 transitions. [2021-07-13 20:18:13,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 21467 transitions. [2021-07-13 20:18:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:13,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:13,936 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:14,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:14,136 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:14,137 INFO L82 PathProgramCache]: Analyzing trace with hash 909348125, now seen corresponding path program 83 times [2021-07-13 20:18:14,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:14,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137825598] [2021-07-13 20:18:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:14,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:14,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137825598] [2021-07-13 20:18:14,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137825598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:14,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604585486] [2021-07-13 20:18:14,403 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 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 [2021-07-13 20:18:14,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:18:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:15,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604585486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:15,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:15,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:18:15,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056475310] [2021-07-13 20:18:15,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:15,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:15,020 INFO L87 Difference]: Start difference. First operand 6384 states and 21467 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:17,728 INFO L93 Difference]: Finished difference Result 8861 states and 28472 transitions. [2021-07-13 20:18:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:18:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:17,744 INFO L225 Difference]: With dead ends: 8861 [2021-07-13 20:18:17,744 INFO L226 Difference]: Without dead ends: 8700 [2021-07-13 20:18:17,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2426.1ms TimeCoverageRelationStatistics Valid=910, Invalid=5410, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:18:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2021-07-13 20:18:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 6395. [2021-07-13 20:18:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6395 states, 6394 states have (on average 3.364716922114482) internal successors, (21514), 6394 states have internal predecessors, (21514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 21514 transitions. [2021-07-13 20:18:17,868 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 21514 transitions. Word has length 36 [2021-07-13 20:18:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:17,868 INFO L482 AbstractCegarLoop]: Abstraction has 6395 states and 21514 transitions. [2021-07-13 20:18:17,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 21514 transitions. [2021-07-13 20:18:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:17,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:17,878 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:18,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-07-13 20:18:18,079 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:18,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1626916125, now seen corresponding path program 84 times [2021-07-13 20:18:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:18,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332789848] [2021-07-13 20:18:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:18,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332789848] [2021-07-13 20:18:18,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332789848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:18,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454549444] [2021-07-13 20:18:18,353 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 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 [2021-07-13 20:18:18,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:18:18,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:18,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454549444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:18,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:18,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:18:18,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028707273] [2021-07-13 20:18:18,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:18:18,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:18,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:18:18,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:18:18,939 INFO L87 Difference]: Start difference. First operand 6395 states and 21514 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:22,276 INFO L93 Difference]: Finished difference Result 10583 states and 33813 transitions. [2021-07-13 20:18:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:18:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:22,294 INFO L225 Difference]: With dead ends: 10583 [2021-07-13 20:18:22,294 INFO L226 Difference]: Without dead ends: 10372 [2021-07-13 20:18:22,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 2780.9ms TimeCoverageRelationStatistics Valid=1202, Invalid=6108, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:18:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-07-13 20:18:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6391. [2021-07-13 20:18:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 3.3641627543035995) internal successors, (21497), 6390 states have internal predecessors, (21497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 21497 transitions. [2021-07-13 20:18:22,434 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 21497 transitions. Word has length 36 [2021-07-13 20:18:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:22,434 INFO L482 AbstractCegarLoop]: Abstraction has 6391 states and 21497 transitions. [2021-07-13 20:18:22,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 21497 transitions. [2021-07-13 20:18:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:22,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:22,444 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:22,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:22,644 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2041887031, now seen corresponding path program 85 times [2021-07-13 20:18:22,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:22,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102497408] [2021-07-13 20:18:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:22,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:22,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102497408] [2021-07-13 20:18:22,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102497408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:22,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541191600] [2021-07-13 20:18:22,926 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 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 [2021-07-13 20:18:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:22,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541191600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:23,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:23,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:18:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995614683] [2021-07-13 20:18:23,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:23,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:23,531 INFO L87 Difference]: Start difference. First operand 6391 states and 21497 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:25,876 INFO L93 Difference]: Finished difference Result 8165 states and 26463 transitions. [2021-07-13 20:18:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:18:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:25,892 INFO L225 Difference]: With dead ends: 8165 [2021-07-13 20:18:25,892 INFO L226 Difference]: Without dead ends: 8004 [2021-07-13 20:18:25,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 2004.2ms TimeCoverageRelationStatistics Valid=724, Invalid=4246, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:18:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2021-07-13 20:18:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 6406. [2021-07-13 20:18:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6406 states, 6405 states have (on average 3.3645589383294303) internal successors, (21550), 6405 states have internal predecessors, (21550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 21550 transitions. [2021-07-13 20:18:26,020 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 21550 transitions. Word has length 36 [2021-07-13 20:18:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:26,020 INFO L482 AbstractCegarLoop]: Abstraction has 6406 states and 21550 transitions. [2021-07-13 20:18:26,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 21550 transitions. [2021-07-13 20:18:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:26,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:26,031 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:26,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-07-13 20:18:26,232 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1324319031, now seen corresponding path program 86 times [2021-07-13 20:18:26,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:26,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469937435] [2021-07-13 20:18:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:26,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:26,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469937435] [2021-07-13 20:18:26,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469937435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:26,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569574348] [2021-07-13 20:18:26,501 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 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 [2021-07-13 20:18:26,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:26,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569574348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:27,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:27,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:18:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032323830] [2021-07-13 20:18:27,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:18:27,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:18:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:18:27,037 INFO L87 Difference]: Start difference. First operand 6406 states and 21550 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:29,830 INFO L93 Difference]: Finished difference Result 10553 states and 33696 transitions. [2021-07-13 20:18:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:18:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:29,852 INFO L225 Difference]: With dead ends: 10553 [2021-07-13 20:18:29,852 INFO L226 Difference]: Without dead ends: 10342 [2021-07-13 20:18:29,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 2381.3ms TimeCoverageRelationStatistics Valid=1002, Invalid=5004, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:18:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2021-07-13 20:18:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6407. [2021-07-13 20:18:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 6406 states have (on average 3.3641898220418356) internal successors, (21551), 6406 states have internal predecessors, (21551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 21551 transitions. [2021-07-13 20:18:30,049 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 21551 transitions. Word has length 36 [2021-07-13 20:18:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:30,049 INFO L482 AbstractCegarLoop]: Abstraction has 6407 states and 21551 transitions. [2021-07-13 20:18:30,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 21551 transitions. [2021-07-13 20:18:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:30,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:30,060 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:30,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-07-13 20:18:30,260 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1151438349, now seen corresponding path program 87 times [2021-07-13 20:18:30,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:30,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965911197] [2021-07-13 20:18:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:30,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965911197] [2021-07-13 20:18:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965911197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:30,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263666106] [2021-07-13 20:18:30,617 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 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 [2021-07-13 20:18:30,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:18:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:30,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:31,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263666106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:31,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:31,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:18:31,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024446444] [2021-07-13 20:18:31,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:18:31,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:18:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:18:31,161 INFO L87 Difference]: Start difference. First operand 6407 states and 21551 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:32,656 INFO L93 Difference]: Finished difference Result 8201 states and 27000 transitions. [2021-07-13 20:18:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:18:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:32,672 INFO L225 Difference]: With dead ends: 8201 [2021-07-13 20:18:32,672 INFO L226 Difference]: Without dead ends: 8072 [2021-07-13 20:18:32,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1488.3ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:18:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8072 states. [2021-07-13 20:18:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8072 to 6405. [2021-07-13 20:18:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6405 states, 6404 states have (on average 3.363366645846346) internal successors, (21539), 6404 states have internal predecessors, (21539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 21539 transitions. [2021-07-13 20:18:32,784 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 21539 transitions. Word has length 36 [2021-07-13 20:18:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:32,784 INFO L482 AbstractCegarLoop]: Abstraction has 6405 states and 21539 transitions. [2021-07-13 20:18:32,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 21539 transitions. [2021-07-13 20:18:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:32,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:32,794 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:32,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-07-13 20:18:32,994 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1790791203, now seen corresponding path program 88 times [2021-07-13 20:18:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:32,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451388520] [2021-07-13 20:18:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:33,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:33,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451388520] [2021-07-13 20:18:33,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451388520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:33,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366515780] [2021-07-13 20:18:33,287 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 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 [2021-07-13 20:18:33,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:33,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:18:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:34,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366515780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:34,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:34,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:18:34,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431049319] [2021-07-13 20:18:34,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:34,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:34,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:34,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:34,009 INFO L87 Difference]: Start difference. First operand 6405 states and 21539 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:36,751 INFO L93 Difference]: Finished difference Result 8063 states and 26002 transitions. [2021-07-13 20:18:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:18:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:36,766 INFO L225 Difference]: With dead ends: 8063 [2021-07-13 20:18:36,766 INFO L226 Difference]: Without dead ends: 7881 [2021-07-13 20:18:36,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2577.2ms TimeCoverageRelationStatistics Valid=730, Invalid=4970, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:18:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2021-07-13 20:18:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 6463. [2021-07-13 20:18:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6463 states, 6462 states have (on average 3.361188486536676) internal successors, (21720), 6462 states have internal predecessors, (21720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 21720 transitions. [2021-07-13 20:18:36,908 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 21720 transitions. Word has length 36 [2021-07-13 20:18:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:36,908 INFO L482 AbstractCegarLoop]: Abstraction has 6463 states and 21720 transitions. [2021-07-13 20:18:36,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 21720 transitions. [2021-07-13 20:18:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:36,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:36,917 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:37,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-07-13 20:18:37,118 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1487215911, now seen corresponding path program 89 times [2021-07-13 20:18:37,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:37,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499877698] [2021-07-13 20:18:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:37,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:37,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499877698] [2021-07-13 20:18:37,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499877698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:37,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999337611] [2021-07-13 20:18:37,405 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 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 [2021-07-13 20:18:37,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:18:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:18:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999337611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:38,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:38,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:18:38,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405004161] [2021-07-13 20:18:38,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:38,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:38,040 INFO L87 Difference]: Start difference. First operand 6463 states and 21720 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:41,286 INFO L93 Difference]: Finished difference Result 8853 states and 28355 transitions. [2021-07-13 20:18:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:18:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:41,303 INFO L225 Difference]: With dead ends: 8853 [2021-07-13 20:18:41,303 INFO L226 Difference]: Without dead ends: 8671 [2021-07-13 20:18:41,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 2753.3ms TimeCoverageRelationStatistics Valid=933, Invalid=5873, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:18:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8671 states. [2021-07-13 20:18:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8671 to 6488. [2021-07-13 20:18:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6488 states, 6487 states have (on average 3.3611839062740865) internal successors, (21804), 6487 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6488 states to 6488 states and 21804 transitions. [2021-07-13 20:18:41,456 INFO L78 Accepts]: Start accepts. Automaton has 6488 states and 21804 transitions. Word has length 36 [2021-07-13 20:18:41,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:41,456 INFO L482 AbstractCegarLoop]: Abstraction has 6488 states and 21804 transitions. [2021-07-13 20:18:41,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 6488 states and 21804 transitions. [2021-07-13 20:18:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:41,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:41,467 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:41,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:41,668 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:41,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:41,668 INFO L82 PathProgramCache]: Analyzing trace with hash 900864729, now seen corresponding path program 90 times [2021-07-13 20:18:41,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:41,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654784394] [2021-07-13 20:18:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:41,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654784394] [2021-07-13 20:18:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654784394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413184656] [2021-07-13 20:18:41,947 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 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 [2021-07-13 20:18:41,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:18:41,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:41,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:18:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:42,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413184656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:42,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:42,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:18:42,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363756525] [2021-07-13 20:18:42,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:42,557 INFO L87 Difference]: Start difference. First operand 6488 states and 21804 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:47,492 INFO L93 Difference]: Finished difference Result 10749 states and 34203 transitions. [2021-07-13 20:18:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:18:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:47,512 INFO L225 Difference]: With dead ends: 10749 [2021-07-13 20:18:47,512 INFO L226 Difference]: Without dead ends: 10510 [2021-07-13 20:18:47,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3874 ImplicationChecksByTransitivity, 4100.9ms TimeCoverageRelationStatistics Valid=1683, Invalid=9659, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:18:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2021-07-13 20:18:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 6505. [2021-07-13 20:18:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 3.367158671586716) internal successors, (21900), 6504 states have internal predecessors, (21900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 21900 transitions. [2021-07-13 20:18:47,675 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 21900 transitions. Word has length 36 [2021-07-13 20:18:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:47,676 INFO L482 AbstractCegarLoop]: Abstraction has 6505 states and 21900 transitions. [2021-07-13 20:18:47,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 21900 transitions. [2021-07-13 20:18:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:47,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:47,687 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:47,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:47,887 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1349181829, now seen corresponding path program 91 times [2021-07-13 20:18:47,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:47,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191227035] [2021-07-13 20:18:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:48,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:48,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191227035] [2021-07-13 20:18:48,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191227035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:48,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311022530] [2021-07-13 20:18:48,185 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 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 [2021-07-13 20:18:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:18:48,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:48,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311022530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:48,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:48,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:18:48,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000198595] [2021-07-13 20:18:48,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:18:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:48,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:18:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:18:48,867 INFO L87 Difference]: Start difference. First operand 6505 states and 21900 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:51,890 INFO L93 Difference]: Finished difference Result 8617 states and 27681 transitions. [2021-07-13 20:18:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:18:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:51,907 INFO L225 Difference]: With dead ends: 8617 [2021-07-13 20:18:51,907 INFO L226 Difference]: Without dead ends: 8435 [2021-07-13 20:18:51,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 2705.2ms TimeCoverageRelationStatistics Valid=942, Invalid=5538, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:18:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8435 states. [2021-07-13 20:18:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8435 to 6568. [2021-07-13 20:18:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 3.367595553525202) internal successors, (22115), 6567 states have internal predecessors, (22115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 22115 transitions. [2021-07-13 20:18:52,047 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 22115 transitions. Word has length 36 [2021-07-13 20:18:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:52,048 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 22115 transitions. [2021-07-13 20:18:52,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 22115 transitions. [2021-07-13 20:18:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:52,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:52,059 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:52,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:52,260 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -557704827, now seen corresponding path program 92 times [2021-07-13 20:18:52,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:52,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725836295] [2021-07-13 20:18:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:52,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725836295] [2021-07-13 20:18:52,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725836295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610433915] [2021-07-13 20:18:52,579 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 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 [2021-07-13 20:18:52,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:52,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:18:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610433915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:53,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:18:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663634244] [2021-07-13 20:18:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:53,346 INFO L87 Difference]: Start difference. First operand 6568 states and 22115 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:58,250 INFO L93 Difference]: Finished difference Result 11094 states and 35253 transitions. [2021-07-13 20:18:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:18:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:18:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:58,271 INFO L225 Difference]: With dead ends: 11094 [2021-07-13 20:18:58,271 INFO L226 Difference]: Without dead ends: 10855 [2021-07-13 20:18:58,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3910 ImplicationChecksByTransitivity, 4222.0ms TimeCoverageRelationStatistics Valid=1777, Invalid=9779, Unknown=0, NotChecked=0, Total=11556 [2021-07-13 20:18:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-07-13 20:18:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 6591. [2021-07-13 20:18:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 6590 states have (on average 3.368740515933232) internal successors, (22200), 6590 states have internal predecessors, (22200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 22200 transitions. [2021-07-13 20:18:58,432 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 22200 transitions. Word has length 36 [2021-07-13 20:18:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:58,432 INFO L482 AbstractCegarLoop]: Abstraction has 6591 states and 22200 transitions. [2021-07-13 20:18:58,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 22200 transitions. [2021-07-13 20:18:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:18:58,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:58,442 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:58,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-07-13 20:18:58,643 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash -766744631, now seen corresponding path program 93 times [2021-07-13 20:18:58,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:58,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901510957] [2021-07-13 20:18:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:58,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:58,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901510957] [2021-07-13 20:18:58,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901510957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:58,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348423458] [2021-07-13 20:18:58,925 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 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 [2021-07-13 20:18:58,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:18:58,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:18:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:59,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348423458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:59,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:59,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:18:59,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000225902] [2021-07-13 20:18:59,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:18:59,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:18:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:18:59,487 INFO L87 Difference]: Start difference. First operand 6591 states and 22200 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:02,032 INFO L93 Difference]: Finished difference Result 8571 states and 27763 transitions. [2021-07-13 20:19:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:19:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:02,050 INFO L225 Difference]: With dead ends: 8571 [2021-07-13 20:19:02,050 INFO L226 Difference]: Without dead ends: 8375 [2021-07-13 20:19:02,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2237.8ms TimeCoverageRelationStatistics Valid=759, Invalid=4941, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:19:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2021-07-13 20:19:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 6588. [2021-07-13 20:19:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6588 states, 6587 states have (on average 3.3693638985881282) internal successors, (22194), 6587 states have internal predecessors, (22194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 22194 transitions. [2021-07-13 20:19:02,211 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 22194 transitions. Word has length 36 [2021-07-13 20:19:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:02,211 INFO L482 AbstractCegarLoop]: Abstraction has 6588 states and 22194 transitions. [2021-07-13 20:19:02,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 22194 transitions. [2021-07-13 20:19:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:02,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:02,222 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:02,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:02,422 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1798276511, now seen corresponding path program 94 times [2021-07-13 20:19:02,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:02,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90983769] [2021-07-13 20:19:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:02,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:02,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90983769] [2021-07-13 20:19:02,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90983769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:02,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877607969] [2021-07-13 20:19:02,798 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 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 [2021-07-13 20:19:02,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:19:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877607969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:03,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:03,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:19:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607562897] [2021-07-13 20:19:03,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:19:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:19:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:03,358 INFO L87 Difference]: Start difference. First operand 6588 states and 22194 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:05,207 INFO L93 Difference]: Finished difference Result 8755 states and 28639 transitions. [2021-07-13 20:19:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:19:05,207 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:05,223 INFO L225 Difference]: With dead ends: 8755 [2021-07-13 20:19:05,224 INFO L226 Difference]: Without dead ends: 8586 [2021-07-13 20:19:05,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1732.8ms TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:19:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2021-07-13 20:19:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 6575. [2021-07-13 20:19:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6575 states, 6574 states have (on average 3.3681168238515364) internal successors, (22142), 6574 states have internal predecessors, (22142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6575 states to 6575 states and 22142 transitions. [2021-07-13 20:19:05,345 INFO L78 Accepts]: Start accepts. Automaton has 6575 states and 22142 transitions. Word has length 36 [2021-07-13 20:19:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:05,345 INFO L482 AbstractCegarLoop]: Abstraction has 6575 states and 22142 transitions. [2021-07-13 20:19:05,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6575 states and 22142 transitions. [2021-07-13 20:19:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:05,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:05,356 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:05,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:05,556 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2027978275, now seen corresponding path program 95 times [2021-07-13 20:19:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:05,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731151517] [2021-07-13 20:19:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:05,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731151517] [2021-07-13 20:19:05,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731151517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:05,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823660037] [2021-07-13 20:19:05,863 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 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 [2021-07-13 20:19:05,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:19:05,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:06,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823660037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:06,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:06,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:19:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79882435] [2021-07-13 20:19:06,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:06,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:06,490 INFO L87 Difference]: Start difference. First operand 6575 states and 22142 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:08,497 INFO L93 Difference]: Finished difference Result 7631 states and 24928 transitions. [2021-07-13 20:19:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:19:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:08,514 INFO L225 Difference]: With dead ends: 7631 [2021-07-13 20:19:08,514 INFO L226 Difference]: Without dead ends: 7496 [2021-07-13 20:19:08,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1954.5ms TimeCoverageRelationStatistics Valid=644, Invalid=3778, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:19:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2021-07-13 20:19:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 6623. [2021-07-13 20:19:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 6622 states have (on average 3.3637873754152823) internal successors, (22275), 6622 states have internal predecessors, (22275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 22275 transitions. [2021-07-13 20:19:08,649 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 22275 transitions. Word has length 36 [2021-07-13 20:19:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:08,650 INFO L482 AbstractCegarLoop]: Abstraction has 6623 states and 22275 transitions. [2021-07-13 20:19:08,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 22275 transitions. [2021-07-13 20:19:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:08,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:08,701 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:08,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,901 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash 39659617, now seen corresponding path program 96 times [2021-07-13 20:19:08,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:08,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138890798] [2021-07-13 20:19:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:09,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138890798] [2021-07-13 20:19:09,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138890798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380460011] [2021-07-13 20:19:09,238 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 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 [2021-07-13 20:19:09,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:19:09,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:09,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380460011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:09,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:09,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:19:09,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56589064] [2021-07-13 20:19:09,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:19:09,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:19:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:19:09,866 INFO L87 Difference]: Start difference. First operand 6623 states and 22275 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:11,952 INFO L93 Difference]: Finished difference Result 9146 states and 29700 transitions. [2021-07-13 20:19:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:19:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:11,969 INFO L225 Difference]: With dead ends: 9146 [2021-07-13 20:19:11,969 INFO L226 Difference]: Without dead ends: 9039 [2021-07-13 20:19:11,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1943.7ms TimeCoverageRelationStatistics Valid=542, Invalid=3118, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:19:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-07-13 20:19:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 6675. [2021-07-13 20:19:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6675 states, 6674 states have (on average 3.3627509739286783) internal successors, (22443), 6674 states have internal predecessors, (22443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6675 states to 6675 states and 22443 transitions. [2021-07-13 20:19:12,095 INFO L78 Accepts]: Start accepts. Automaton has 6675 states and 22443 transitions. Word has length 36 [2021-07-13 20:19:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:12,095 INFO L482 AbstractCegarLoop]: Abstraction has 6675 states and 22443 transitions. [2021-07-13 20:19:12,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6675 states and 22443 transitions. [2021-07-13 20:19:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:12,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:12,105 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:12,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:12,306 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 624740321, now seen corresponding path program 97 times [2021-07-13 20:19:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691555571] [2021-07-13 20:19:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:12,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691555571] [2021-07-13 20:19:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691555571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285248117] [2021-07-13 20:19:12,585 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 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 [2021-07-13 20:19:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:12,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285248117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:13,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:19:13,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63460412] [2021-07-13 20:19:13,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:13,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:13,178 INFO L87 Difference]: Start difference. First operand 6675 states and 22443 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:16,377 INFO L93 Difference]: Finished difference Result 9103 states and 29318 transitions. [2021-07-13 20:19:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:19:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:16,395 INFO L225 Difference]: With dead ends: 9103 [2021-07-13 20:19:16,396 INFO L226 Difference]: Without dead ends: 8968 [2021-07-13 20:19:16,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2871.3ms TimeCoverageRelationStatistics Valid=936, Invalid=6546, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:19:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8968 states. [2021-07-13 20:19:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8968 to 6649. [2021-07-13 20:19:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.3670276774969916) internal successors, (22384), 6648 states have internal predecessors, (22384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22384 transitions. [2021-07-13 20:19:16,532 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22384 transitions. Word has length 36 [2021-07-13 20:19:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22384 transitions. [2021-07-13 20:19:16,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22384 transitions. [2021-07-13 20:19:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:16,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:16,543 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:16,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-07-13 20:19:16,743 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -58845595, now seen corresponding path program 98 times [2021-07-13 20:19:16,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:16,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186537540] [2021-07-13 20:19:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186537540] [2021-07-13 20:19:17,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186537540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841519212] [2021-07-13 20:19:17,027 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 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 [2021-07-13 20:19:17,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:17,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841519212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:17,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:17,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:19:17,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004636345] [2021-07-13 20:19:17,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:19:17,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:19:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:19:17,591 INFO L87 Difference]: Start difference. First operand 6649 states and 22384 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:22,340 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-13 20:19:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:22,868 INFO L93 Difference]: Finished difference Result 10438 states and 33397 transitions. [2021-07-13 20:19:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:19:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:22,885 INFO L225 Difference]: With dead ends: 10438 [2021-07-13 20:19:22,885 INFO L226 Difference]: Without dead ends: 10257 [2021-07-13 20:19:22,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4092 ImplicationChecksByTransitivity, 4472.8ms TimeCoverageRelationStatistics Valid=1264, Invalid=10726, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:19:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10257 states. [2021-07-13 20:19:23,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10257 to 6667. [2021-07-13 20:19:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6667 states, 6666 states have (on average 3.37023702370237) internal successors, (22466), 6666 states have internal predecessors, (22466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 22466 transitions. [2021-07-13 20:19:23,024 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 22466 transitions. Word has length 36 [2021-07-13 20:19:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:23,024 INFO L482 AbstractCegarLoop]: Abstraction has 6667 states and 22466 transitions. [2021-07-13 20:19:23,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 22466 transitions. [2021-07-13 20:19:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:23,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:23,034 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:23,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:23,235 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash -964881055, now seen corresponding path program 99 times [2021-07-13 20:19:23,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:23,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389235879] [2021-07-13 20:19:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:23,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:23,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389235879] [2021-07-13 20:19:23,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389235879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:23,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862579375] [2021-07-13 20:19:23,538 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 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 [2021-07-13 20:19:23,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:19:23,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:23,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:24,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862579375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:24,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:24,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:19:24,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138418341] [2021-07-13 20:19:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:24,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:24,101 INFO L87 Difference]: Start difference. First operand 6667 states and 22466 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:30,673 INFO L93 Difference]: Finished difference Result 13182 states and 41574 transitions. [2021-07-13 20:19:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-13 20:19:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:30,697 INFO L225 Difference]: With dead ends: 13182 [2021-07-13 20:19:30,697 INFO L226 Difference]: Without dead ends: 12943 [2021-07-13 20:19:30,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5855 ImplicationChecksByTransitivity, 5376.4ms TimeCoverageRelationStatistics Valid=2343, Invalid=14427, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:19:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12943 states. [2021-07-13 20:19:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12943 to 6715. [2021-07-13 20:19:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6715 states, 6714 states have (on average 3.3717605004468276) internal successors, (22638), 6714 states have internal predecessors, (22638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 22638 transitions. [2021-07-13 20:19:30,853 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 22638 transitions. Word has length 36 [2021-07-13 20:19:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:30,854 INFO L482 AbstractCegarLoop]: Abstraction has 6715 states and 22638 transitions. [2021-07-13 20:19:30,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 22638 transitions. [2021-07-13 20:19:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:30,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:30,863 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:31,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:31,064 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1486345203, now seen corresponding path program 100 times [2021-07-13 20:19:31,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:31,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811571778] [2021-07-13 20:19:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:31,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811571778] [2021-07-13 20:19:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811571778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929664099] [2021-07-13 20:19:31,442 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 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 [2021-07-13 20:19:31,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:31,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:19:31,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:32,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929664099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:32,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:32,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:19:32,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628994149] [2021-07-13 20:19:32,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:32,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:32,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:32,169 INFO L87 Difference]: Start difference. First operand 6715 states and 22638 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:34,120 INFO L93 Difference]: Finished difference Result 9443 states and 30713 transitions. [2021-07-13 20:19:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:19:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:34,136 INFO L225 Difference]: With dead ends: 9443 [2021-07-13 20:19:34,136 INFO L226 Difference]: Without dead ends: 9362 [2021-07-13 20:19:34,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2035.5ms TimeCoverageRelationStatistics Valid=560, Invalid=3472, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:19:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2021-07-13 20:19:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 6796. [2021-07-13 20:19:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.3711552612214866) internal successors, (22907), 6795 states have internal predecessors, (22907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22907 transitions. [2021-07-13 20:19:34,255 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22907 transitions. Word has length 36 [2021-07-13 20:19:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:34,255 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22907 transitions. [2021-07-13 20:19:34,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22907 transitions. [2021-07-13 20:19:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:34,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:34,266 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:34,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-07-13 20:19:34,466 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:34,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1970694925, now seen corresponding path program 101 times [2021-07-13 20:19:34,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:34,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240857548] [2021-07-13 20:19:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240857548] [2021-07-13 20:19:34,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240857548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229694357] [2021-07-13 20:19:34,770 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 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 [2021-07-13 20:19:34,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:34,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229694357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:35,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:35,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:19:35,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141231541] [2021-07-13 20:19:35,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:35,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:35,378 INFO L87 Difference]: Start difference. First operand 6796 states and 22907 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:38,114 INFO L93 Difference]: Finished difference Result 8718 states and 28042 transitions. [2021-07-13 20:19:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:19:38,115 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:38,131 INFO L225 Difference]: With dead ends: 8718 [2021-07-13 20:19:38,131 INFO L226 Difference]: Without dead ends: 8583 [2021-07-13 20:19:38,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2482.0ms TimeCoverageRelationStatistics Valid=782, Invalid=5224, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:19:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-07-13 20:19:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 6796. [2021-07-13 20:19:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.3724797645327445) internal successors, (22916), 6795 states have internal predecessors, (22916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22916 transitions. [2021-07-13 20:19:38,296 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22916 transitions. Word has length 36 [2021-07-13 20:19:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:38,296 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22916 transitions. [2021-07-13 20:19:38,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22916 transitions. [2021-07-13 20:19:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:38,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:38,305 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:38,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-07-13 20:19:38,506 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1292633105, now seen corresponding path program 102 times [2021-07-13 20:19:38,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:38,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529095070] [2021-07-13 20:19:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:38,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:38,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529095070] [2021-07-13 20:19:38,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529095070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:38,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713333160] [2021-07-13 20:19:38,870 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 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 [2021-07-13 20:19:38,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:19:38,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:38,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:19:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:39,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713333160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:39,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:19:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718978621] [2021-07-13 20:19:39,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:19:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:19:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:39,498 INFO L87 Difference]: Start difference. First operand 6796 states and 22916 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:43,320 INFO L93 Difference]: Finished difference Result 13252 states and 42841 transitions. [2021-07-13 20:19:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:19:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:43,345 INFO L225 Difference]: With dead ends: 13252 [2021-07-13 20:19:43,346 INFO L226 Difference]: Without dead ends: 13138 [2021-07-13 20:19:43,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 3422.3ms TimeCoverageRelationStatistics Valid=1334, Invalid=7038, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:19:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2021-07-13 20:19:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 6904. [2021-07-13 20:19:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 3.371867304070694) internal successors, (23276), 6903 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 23276 transitions. [2021-07-13 20:19:43,506 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 23276 transitions. Word has length 36 [2021-07-13 20:19:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:43,506 INFO L482 AbstractCegarLoop]: Abstraction has 6904 states and 23276 transitions. [2021-07-13 20:19:43,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 23276 transitions. [2021-07-13 20:19:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:43,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:43,517 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:43,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-07-13 20:19:43,718 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1584850415, now seen corresponding path program 103 times [2021-07-13 20:19:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:43,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592972443] [2021-07-13 20:19:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:44,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592972443] [2021-07-13 20:19:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592972443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632433034] [2021-07-13 20:19:44,037 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 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 [2021-07-13 20:19:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:44,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:44,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:44,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632433034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:44,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:44,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:19:44,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498437925] [2021-07-13 20:19:44,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:44,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:44,640 INFO L87 Difference]: Start difference. First operand 6904 states and 23276 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:49,371 INFO L93 Difference]: Finished difference Result 11066 states and 35302 transitions. [2021-07-13 20:19:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 20:19:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:49,391 INFO L225 Difference]: With dead ends: 11066 [2021-07-13 20:19:49,392 INFO L226 Difference]: Without dead ends: 10917 [2021-07-13 20:19:49,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3544 ImplicationChecksByTransitivity, 4070.9ms TimeCoverageRelationStatistics Valid=1357, Invalid=9355, Unknown=0, NotChecked=0, Total=10712 [2021-07-13 20:19:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2021-07-13 20:19:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 6904. [2021-07-13 20:19:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 3.373315949587136) internal successors, (23286), 6903 states have internal predecessors, (23286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 23286 transitions. [2021-07-13 20:19:49,545 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 23286 transitions. Word has length 36 [2021-07-13 20:19:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:49,545 INFO L482 AbstractCegarLoop]: Abstraction has 6904 states and 23286 transitions. [2021-07-13 20:19:49,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 23286 transitions. [2021-07-13 20:19:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:49,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:49,556 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:49,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-13 20:19:49,756 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash -592356851, now seen corresponding path program 104 times [2021-07-13 20:19:49,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:49,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317166570] [2021-07-13 20:19:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:50,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317166570] [2021-07-13 20:19:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317166570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983668696] [2021-07-13 20:19:50,090 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 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 [2021-07-13 20:19:50,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:19:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983668696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:50,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:19:50,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471488771] [2021-07-13 20:19:50,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:50,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:50,659 INFO L87 Difference]: Start difference. First operand 6904 states and 23286 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,912 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-13 20:19:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:56,428 INFO L93 Difference]: Finished difference Result 12893 states and 40872 transitions. [2021-07-13 20:19:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:19:56,428 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:19:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:56,453 INFO L225 Difference]: With dead ends: 12893 [2021-07-13 20:19:56,453 INFO L226 Difference]: Without dead ends: 12712 [2021-07-13 20:19:56,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 4629.1ms TimeCoverageRelationStatistics Valid=1639, Invalid=11017, Unknown=0, NotChecked=0, Total=12656 [2021-07-13 20:19:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12712 states. [2021-07-13 20:19:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12712 to 6894. [2021-07-13 20:19:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6894 states, 6893 states have (on average 3.372116640069636) internal successors, (23244), 6893 states have internal predecessors, (23244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6894 states to 6894 states and 23244 transitions. [2021-07-13 20:19:56,653 INFO L78 Accepts]: Start accepts. Automaton has 6894 states and 23244 transitions. Word has length 36 [2021-07-13 20:19:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:56,653 INFO L482 AbstractCegarLoop]: Abstraction has 6894 states and 23244 transitions. [2021-07-13 20:19:56,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6894 states and 23244 transitions. [2021-07-13 20:19:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:19:56,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:56,663 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:56,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-07-13 20:19:56,863 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:56,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1104420783, now seen corresponding path program 105 times [2021-07-13 20:19:56,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:56,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653981773] [2021-07-13 20:19:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:57,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:57,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653981773] [2021-07-13 20:19:57,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653981773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:57,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896449089] [2021-07-13 20:19:57,216 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 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 [2021-07-13 20:19:57,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:19:57,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:19:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:57,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896449089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:57,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:57,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:19:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373316605] [2021-07-13 20:19:57,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:19:57,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:19:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:19:57,827 INFO L87 Difference]: Start difference. First operand 6894 states and 23244 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:00,638 INFO L93 Difference]: Finished difference Result 13516 states and 44077 transitions. [2021-07-13 20:20:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:20:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:00,667 INFO L225 Difference]: With dead ends: 13516 [2021-07-13 20:20:00,667 INFO L226 Difference]: Without dead ends: 13396 [2021-07-13 20:20:00,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2600.9ms TimeCoverageRelationStatistics Valid=1004, Invalid=4696, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:20:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13396 states. [2021-07-13 20:20:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13396 to 6940. [2021-07-13 20:20:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6939 states have (on average 3.372532065139069) internal successors, (23402), 6939 states have internal predecessors, (23402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 23402 transitions. [2021-07-13 20:20:00,835 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 23402 transitions. Word has length 36 [2021-07-13 20:20:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:00,835 INFO L482 AbstractCegarLoop]: Abstraction has 6940 states and 23402 transitions. [2021-07-13 20:20:00,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 23402 transitions. [2021-07-13 20:20:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:00,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:00,846 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:01,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-07-13 20:20:01,047 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash -379383343, now seen corresponding path program 106 times [2021-07-13 20:20:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:01,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888143814] [2021-07-13 20:20:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:01,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:01,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888143814] [2021-07-13 20:20:01,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888143814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:01,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719770483] [2021-07-13 20:20:01,454 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 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 [2021-07-13 20:20:01,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:01,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719770483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:20:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5267243] [2021-07-13 20:20:02,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:20:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:20:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:20:02,087 INFO L87 Difference]: Start difference. First operand 6940 states and 23402 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:03,628 INFO L93 Difference]: Finished difference Result 10660 states and 35159 transitions. [2021-07-13 20:20:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:20:03,628 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:03,648 INFO L225 Difference]: With dead ends: 10660 [2021-07-13 20:20:03,649 INFO L226 Difference]: Without dead ends: 10540 [2021-07-13 20:20:03,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1579.0ms TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:20:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-07-13 20:20:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 6948. [2021-07-13 20:20:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6948 states, 6947 states have (on average 3.3721030660716855) internal successors, (23426), 6947 states have internal predecessors, (23426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6948 states to 6948 states and 23426 transitions. [2021-07-13 20:20:03,793 INFO L78 Accepts]: Start accepts. Automaton has 6948 states and 23426 transitions. Word has length 36 [2021-07-13 20:20:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:03,793 INFO L482 AbstractCegarLoop]: Abstraction has 6948 states and 23426 transitions. [2021-07-13 20:20:03,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6948 states and 23426 transitions. [2021-07-13 20:20:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:03,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:03,803 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:04,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:04,004 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1952304667, now seen corresponding path program 107 times [2021-07-13 20:20:04,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:04,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68062515] [2021-07-13 20:20:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:04,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:04,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68062515] [2021-07-13 20:20:04,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68062515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000751758] [2021-07-13 20:20:04,286 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 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 [2021-07-13 20:20:04,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:20:04,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:04,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000751758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:04,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:20:04,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495917660] [2021-07-13 20:20:04,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:20:04,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:04,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:20:04,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:20:04,870 INFO L87 Difference]: Start difference. First operand 6948 states and 23426 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:07,557 INFO L93 Difference]: Finished difference Result 8582 states and 27857 transitions. [2021-07-13 20:20:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:20:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:07,574 INFO L225 Difference]: With dead ends: 8582 [2021-07-13 20:20:07,574 INFO L226 Difference]: Without dead ends: 8421 [2021-07-13 20:20:07,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2345.6ms TimeCoverageRelationStatistics Valid=700, Invalid=4702, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:20:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8421 states. [2021-07-13 20:20:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8421 to 6966. [2021-07-13 20:20:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 3.371715721464465) internal successors, (23484), 6965 states have internal predecessors, (23484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 23484 transitions. [2021-07-13 20:20:07,729 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 23484 transitions. Word has length 36 [2021-07-13 20:20:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:07,729 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 23484 transitions. [2021-07-13 20:20:07,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 23484 transitions. [2021-07-13 20:20:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:07,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:07,740 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:07,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:07,942 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash -959811103, now seen corresponding path program 108 times [2021-07-13 20:20:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:07,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292899114] [2021-07-13 20:20:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:08,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292899114] [2021-07-13 20:20:08,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292899114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844688172] [2021-07-13 20:20:08,258 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 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 [2021-07-13 20:20:08,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:08,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844688172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:08,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:08,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:20:08,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585066941] [2021-07-13 20:20:08,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:20:08,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:08,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:20:08,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:20:08,809 INFO L87 Difference]: Start difference. First operand 6966 states and 23484 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:12,250 INFO L93 Difference]: Finished difference Result 10534 states and 33798 transitions. [2021-07-13 20:20:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:20:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:12,270 INFO L225 Difference]: With dead ends: 10534 [2021-07-13 20:20:12,270 INFO L226 Difference]: Without dead ends: 10338 [2021-07-13 20:20:12,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 2654.9ms TimeCoverageRelationStatistics Valid=939, Invalid=6033, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:20:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10338 states. [2021-07-13 20:20:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10338 to 6968. [2021-07-13 20:20:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6967 states have (on average 3.371609013922779) internal successors, (23490), 6967 states have internal predecessors, (23490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 23490 transitions. [2021-07-13 20:20:12,442 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 23490 transitions. Word has length 36 [2021-07-13 20:20:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:12,442 INFO L482 AbstractCegarLoop]: Abstraction has 6968 states and 23490 transitions. [2021-07-13 20:20:12,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 23490 transitions. [2021-07-13 20:20:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:12,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:12,452 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:12,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:12,653 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash 383921037, now seen corresponding path program 109 times [2021-07-13 20:20:12,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:12,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821350243] [2021-07-13 20:20:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:12,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:12,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821350243] [2021-07-13 20:20:12,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821350243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:12,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863856134] [2021-07-13 20:20:12,923 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 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 [2021-07-13 20:20:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863856134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:13,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:13,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:20:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415625223] [2021-07-13 20:20:13,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:20:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:20:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:20:13,490 INFO L87 Difference]: Start difference. First operand 6968 states and 23490 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:15,967 INFO L93 Difference]: Finished difference Result 9182 states and 29771 transitions. [2021-07-13 20:20:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:20:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:15,985 INFO L225 Difference]: With dead ends: 9182 [2021-07-13 20:20:15,986 INFO L226 Difference]: Without dead ends: 9021 [2021-07-13 20:20:15,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2073.0ms TimeCoverageRelationStatistics Valid=758, Invalid=4644, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:20:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9021 states. [2021-07-13 20:20:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9021 to 6978. [2021-07-13 20:20:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 6977 states have (on average 3.3715063780994696) internal successors, (23523), 6977 states have internal predecessors, (23523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 23523 transitions. [2021-07-13 20:20:16,131 INFO L78 Accepts]: Start accepts. Automaton has 6978 states and 23523 transitions. Word has length 36 [2021-07-13 20:20:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:16,131 INFO L482 AbstractCegarLoop]: Abstraction has 6978 states and 23523 transitions. [2021-07-13 20:20:16,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6978 states and 23523 transitions. [2021-07-13 20:20:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:16,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:16,142 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:16,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable807,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:16,343 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1101489037, now seen corresponding path program 110 times [2021-07-13 20:20:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:16,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166748483] [2021-07-13 20:20:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:16,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:16,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166748483] [2021-07-13 20:20:16,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166748483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:16,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752547928] [2021-07-13 20:20:16,621 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 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 [2021-07-13 20:20:16,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:16,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752547928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:17,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:17,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:20:17,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040394022] [2021-07-13 20:20:17,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:20:17,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:20:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:20:17,190 INFO L87 Difference]: Start difference. First operand 6978 states and 23523 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:20,238 INFO L93 Difference]: Finished difference Result 11789 states and 37843 transitions. [2021-07-13 20:20:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:20:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:20,262 INFO L225 Difference]: With dead ends: 11789 [2021-07-13 20:20:20,262 INFO L226 Difference]: Without dead ends: 11578 [2021-07-13 20:20:20,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 2582.9ms TimeCoverageRelationStatistics Valid=1029, Invalid=5451, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:20:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11578 states. [2021-07-13 20:20:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11578 to 6982. [2021-07-13 20:20:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 3.371580002864919) internal successors, (23537), 6981 states have internal predecessors, (23537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 23537 transitions. [2021-07-13 20:20:20,428 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 23537 transitions. Word has length 36 [2021-07-13 20:20:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:20,428 INFO L482 AbstractCegarLoop]: Abstraction has 6982 states and 23537 transitions. [2021-07-13 20:20:20,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 23537 transitions. [2021-07-13 20:20:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:20,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:20,439 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:20,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-07-13 20:20:20,641 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash -717720879, now seen corresponding path program 111 times [2021-07-13 20:20:20,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:20,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141917460] [2021-07-13 20:20:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:20,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:20,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141917460] [2021-07-13 20:20:20,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141917460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:20,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851800083] [2021-07-13 20:20:20,995 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 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 [2021-07-13 20:20:21,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:20:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:21,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851800083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:21,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:21,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:20:21,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114765314] [2021-07-13 20:20:21,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:20:21,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:20:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:20:21,544 INFO L87 Difference]: Start difference. First operand 6982 states and 23537 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:23,339 INFO L93 Difference]: Finished difference Result 9638 states and 31831 transitions. [2021-07-13 20:20:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:20:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:23,358 INFO L225 Difference]: With dead ends: 9638 [2021-07-13 20:20:23,358 INFO L226 Difference]: Without dead ends: 9509 [2021-07-13 20:20:23,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1607.1ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:20:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9509 states. [2021-07-13 20:20:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9509 to 6968. [2021-07-13 20:20:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6967 states have (on average 3.371609013922779) internal successors, (23490), 6967 states have internal predecessors, (23490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 23490 transitions. [2021-07-13 20:20:23,507 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 23490 transitions. Word has length 36 [2021-07-13 20:20:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:23,507 INFO L482 AbstractCegarLoop]: Abstraction has 6968 states and 23490 transitions. [2021-07-13 20:20:23,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 23490 transitions. [2021-07-13 20:20:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:23,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:23,518 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:23,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable815,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:23,719 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash -248849779, now seen corresponding path program 112 times [2021-07-13 20:20:23,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:23,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619409237] [2021-07-13 20:20:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:23,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619409237] [2021-07-13 20:20:23,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619409237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320076232] [2021-07-13 20:20:23,954 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 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 [2021-07-13 20:20:23,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:23,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:20:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320076232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:24,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:24,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:20:24,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126789788] [2021-07-13 20:20:24,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:20:24,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:20:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:20:24,511 INFO L87 Difference]: Start difference. First operand 6968 states and 23490 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:26,189 INFO L93 Difference]: Finished difference Result 11126 states and 36623 transitions. [2021-07-13 20:20:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:20:26,190 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:26,212 INFO L225 Difference]: With dead ends: 11126 [2021-07-13 20:20:26,213 INFO L226 Difference]: Without dead ends: 11046 [2021-07-13 20:20:26,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1425.1ms TimeCoverageRelationStatistics Valid=573, Invalid=2619, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:20:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11046 states. [2021-07-13 20:20:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11046 to 6990. [2021-07-13 20:20:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.3707254256689083) internal successors, (23558), 6989 states have internal predecessors, (23558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 23558 transitions. [2021-07-13 20:20:26,382 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 23558 transitions. Word has length 36 [2021-07-13 20:20:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:26,382 INFO L482 AbstractCegarLoop]: Abstraction has 6990 states and 23558 transitions. [2021-07-13 20:20:26,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 23558 transitions. [2021-07-13 20:20:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:26,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:26,393 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:26,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-07-13 20:20:26,594 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:26,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash 635016865, now seen corresponding path program 113 times [2021-07-13 20:20:26,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:26,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144933548] [2021-07-13 20:20:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:26,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:26,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144933548] [2021-07-13 20:20:26,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144933548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:26,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573334141] [2021-07-13 20:20:26,915 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 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 [2021-07-13 20:20:26,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:20:26,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:20:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:27,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573334141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:27,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:27,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:20:27,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848487213] [2021-07-13 20:20:27,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:27,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:27,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:27,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:27,551 INFO L87 Difference]: Start difference. First operand 6990 states and 23558 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:30,170 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-07-13 20:20:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:30,864 INFO L93 Difference]: Finished difference Result 9060 states and 29222 transitions. [2021-07-13 20:20:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:20:30,864 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:30,880 INFO L225 Difference]: With dead ends: 9060 [2021-07-13 20:20:30,881 INFO L226 Difference]: Without dead ends: 8845 [2021-07-13 20:20:30,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2826.5ms TimeCoverageRelationStatistics Valid=808, Invalid=5834, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:20:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8845 states. [2021-07-13 20:20:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8845 to 7026. [2021-07-13 20:20:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.3702491103202847) internal successors, (23676), 7025 states have internal predecessors, (23676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 23676 transitions. [2021-07-13 20:20:31,019 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 23676 transitions. Word has length 36 [2021-07-13 20:20:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:31,019 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 23676 transitions. [2021-07-13 20:20:31,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 23676 transitions. [2021-07-13 20:20:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:31,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:31,031 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:31,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:31,232 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:31,232 INFO L82 PathProgramCache]: Analyzing trace with hash 938592157, now seen corresponding path program 114 times [2021-07-13 20:20:31,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:31,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025892761] [2021-07-13 20:20:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:31,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:31,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025892761] [2021-07-13 20:20:31,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025892761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:31,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946817273] [2021-07-13 20:20:31,530 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 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 [2021-07-13 20:20:31,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:20:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:20:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946817273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:32,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:32,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:20:32,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961270143] [2021-07-13 20:20:32,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:20:32,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:20:32,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:20:32,127 INFO L87 Difference]: Start difference. First operand 7026 states and 23676 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:36,089 INFO L93 Difference]: Finished difference Result 10086 states and 32277 transitions. [2021-07-13 20:20:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:20:36,089 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:36,108 INFO L225 Difference]: With dead ends: 10086 [2021-07-13 20:20:36,108 INFO L226 Difference]: Without dead ends: 9810 [2021-07-13 20:20:36,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 3008.7ms TimeCoverageRelationStatistics Valid=963, Invalid=6869, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:20:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-13 20:20:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7046. [2021-07-13 20:20:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 3.372178850248403) internal successors, (23757), 7045 states have internal predecessors, (23757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 23757 transitions. [2021-07-13 20:20:36,243 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 23757 transitions. Word has length 36 [2021-07-13 20:20:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:36,243 INFO L482 AbstractCegarLoop]: Abstraction has 7046 states and 23757 transitions. [2021-07-13 20:20:36,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 23757 transitions. [2021-07-13 20:20:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:36,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:36,254 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:36,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:36,454 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -519977399, now seen corresponding path program 115 times [2021-07-13 20:20:36,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:36,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864827730] [2021-07-13 20:20:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:36,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864827730] [2021-07-13 20:20:36,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864827730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105065884] [2021-07-13 20:20:36,811 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 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 [2021-07-13 20:20:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:20:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:37,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105065884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:37,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:37,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:20:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827301104] [2021-07-13 20:20:37,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:37,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:37,469 INFO L87 Difference]: Start difference. First operand 7046 states and 23757 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:40,652 INFO L93 Difference]: Finished difference Result 9110 states and 29420 transitions. [2021-07-13 20:20:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:20:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:40,669 INFO L225 Difference]: With dead ends: 9110 [2021-07-13 20:20:40,669 INFO L226 Difference]: Without dead ends: 8895 [2021-07-13 20:20:40,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 2851.7ms TimeCoverageRelationStatistics Valid=963, Invalid=6009, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:20:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8895 states. [2021-07-13 20:20:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8895 to 7070. [2021-07-13 20:20:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.3709152638279813) internal successors, (23829), 7069 states have internal predecessors, (23829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 23829 transitions. [2021-07-13 20:20:40,796 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 23829 transitions. Word has length 36 [2021-07-13 20:20:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:40,796 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 23829 transitions. [2021-07-13 20:20:40,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 23829 transitions. [2021-07-13 20:20:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:40,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:40,805 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:41,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable842,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:41,007 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1868103241, now seen corresponding path program 116 times [2021-07-13 20:20:41,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:41,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115551938] [2021-07-13 20:20:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:41,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:41,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115551938] [2021-07-13 20:20:41,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115551938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:41,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998100434] [2021-07-13 20:20:41,305 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 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 [2021-07-13 20:20:41,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:41,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:20:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:41,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998100434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:41,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:41,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:20:41,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609967687] [2021-07-13 20:20:41,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:20:41,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:20:41,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:20:41,910 INFO L87 Difference]: Start difference. First operand 7070 states and 23829 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:47,154 INFO L93 Difference]: Finished difference Result 12000 states and 38137 transitions. [2021-07-13 20:20:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:20:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:47,176 INFO L225 Difference]: With dead ends: 12000 [2021-07-13 20:20:47,176 INFO L226 Difference]: Without dead ends: 11719 [2021-07-13 20:20:47,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 4379.7ms TimeCoverageRelationStatistics Valid=1878, Invalid=11004, Unknown=0, NotChecked=0, Total=12882 [2021-07-13 20:20:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11719 states. [2021-07-13 20:20:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11719 to 7096. [2021-07-13 20:20:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 7095 states have (on average 3.3722339675828046) internal successors, (23926), 7095 states have internal predecessors, (23926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 23926 transitions. [2021-07-13 20:20:47,354 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 23926 transitions. Word has length 36 [2021-07-13 20:20:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:47,354 INFO L482 AbstractCegarLoop]: Abstraction has 7096 states and 23926 transitions. [2021-07-13 20:20:47,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 23926 transitions. [2021-07-13 20:20:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:47,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:47,365 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:47,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable846 [2021-07-13 20:20:47,566 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1659063437, now seen corresponding path program 117 times [2021-07-13 20:20:47,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:47,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835081720] [2021-07-13 20:20:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:47,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:47,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835081720] [2021-07-13 20:20:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835081720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:47,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771864976] [2021-07-13 20:20:47,846 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 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 [2021-07-13 20:20:47,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:20:47,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:48,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771864976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:48,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:48,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:20:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9847903] [2021-07-13 20:20:48,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:20:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:20:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:20:48,471 INFO L87 Difference]: Start difference. First operand 7096 states and 23926 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:51,289 INFO L93 Difference]: Finished difference Result 9477 states and 30670 transitions. [2021-07-13 20:20:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:20:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:51,305 INFO L225 Difference]: With dead ends: 9477 [2021-07-13 20:20:51,305 INFO L226 Difference]: Without dead ends: 9281 [2021-07-13 20:20:51,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2401.0ms TimeCoverageRelationStatistics Valid=778, Invalid=5228, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:20:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9281 states. [2021-07-13 20:20:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9281 to 7084. [2021-07-13 20:20:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7083 states have (on average 3.3727234222786953) internal successors, (23889), 7083 states have internal predecessors, (23889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 23889 transitions. [2021-07-13 20:20:51,424 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 23889 transitions. Word has length 36 [2021-07-13 20:20:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:51,424 INFO L482 AbstractCegarLoop]: Abstraction has 7084 states and 23889 transitions. [2021-07-13 20:20:51,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 23889 transitions. [2021-07-13 20:20:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:51,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:51,434 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:51,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-07-13 20:20:51,637 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 627531557, now seen corresponding path program 118 times [2021-07-13 20:20:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238382157] [2021-07-13 20:20:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:52,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:52,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238382157] [2021-07-13 20:20:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238382157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:52,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115102046] [2021-07-13 20:20:52,008 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 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 [2021-07-13 20:20:52,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:52,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:52,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:20:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:52,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115102046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:52,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:52,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:20:52,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118162424] [2021-07-13 20:20:52,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:20:52,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:20:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:20:52,635 INFO L87 Difference]: Start difference. First operand 7084 states and 23889 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:54,643 INFO L93 Difference]: Finished difference Result 10217 states and 33507 transitions. [2021-07-13 20:20:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:20:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:54,662 INFO L225 Difference]: With dead ends: 10217 [2021-07-13 20:20:54,663 INFO L226 Difference]: Without dead ends: 10048 [2021-07-13 20:20:54,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1854.8ms TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:20:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10048 states. [2021-07-13 20:20:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10048 to 7054. [2021-07-13 20:20:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.3720402665532396) internal successors, (23783), 7053 states have internal predecessors, (23783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 23783 transitions. [2021-07-13 20:20:54,822 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 23783 transitions. Word has length 36 [2021-07-13 20:20:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:54,822 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 23783 transitions. [2021-07-13 20:20:54,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 23783 transitions. [2021-07-13 20:20:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:54,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:54,833 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:55,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:55,034 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 756399901, now seen corresponding path program 119 times [2021-07-13 20:20:55,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:55,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70939576] [2021-07-13 20:20:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:55,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70939576] [2021-07-13 20:20:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70939576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582041357] [2021-07-13 20:20:55,362 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 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 [2021-07-13 20:20:55,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:20:55,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:20:55,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582041357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:56,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:56,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-13 20:20:56,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249325925] [2021-07-13 20:20:56,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:20:56,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:20:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:20:56,003 INFO L87 Difference]: Start difference. First operand 7054 states and 23783 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:58,337 INFO L93 Difference]: Finished difference Result 11505 states and 37707 transitions. [2021-07-13 20:20:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:20:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:20:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:58,360 INFO L225 Difference]: With dead ends: 11505 [2021-07-13 20:20:58,360 INFO L226 Difference]: Without dead ends: 11444 [2021-07-13 20:20:58,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 2183.3ms TimeCoverageRelationStatistics Valid=611, Invalid=4081, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:20:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11444 states. [2021-07-13 20:20:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 7228. [2021-07-13 20:20:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7228 states, 7227 states have (on average 3.3659886536598864) internal successors, (24326), 7227 states have internal predecessors, (24326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7228 states to 7228 states and 24326 transitions. [2021-07-13 20:20:58,521 INFO L78 Accepts]: Start accepts. Automaton has 7228 states and 24326 transitions. Word has length 36 [2021-07-13 20:20:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:58,522 INFO L482 AbstractCegarLoop]: Abstraction has 7228 states and 24326 transitions. [2021-07-13 20:20:58,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7228 states and 24326 transitions. [2021-07-13 20:20:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:20:58,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:58,532 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:58,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-07-13 20:20:58,733 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1270845923, now seen corresponding path program 120 times [2021-07-13 20:20:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:58,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788908939] [2021-07-13 20:20:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:59,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:59,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788908939] [2021-07-13 20:20:59,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788908939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:59,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525537779] [2021-07-13 20:20:59,065 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 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 [2021-07-13 20:20:59,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:20:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:20:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:59,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525537779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:59,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:59,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:20:59,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006659279] [2021-07-13 20:20:59,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:20:59,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:20:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:20:59,707 INFO L87 Difference]: Start difference. First operand 7228 states and 24326 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:03,024 INFO L93 Difference]: Finished difference Result 14809 states and 47701 transitions. [2021-07-13 20:21:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:21:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:03,055 INFO L225 Difference]: With dead ends: 14809 [2021-07-13 20:21:03,055 INFO L226 Difference]: Without dead ends: 14689 [2021-07-13 20:21:03,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2930.2ms TimeCoverageRelationStatistics Valid=1114, Invalid=5366, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:21:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14689 states. [2021-07-13 20:21:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14689 to 7311. [2021-07-13 20:21:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7311 states, 7310 states have (on average 3.3667578659370725) internal successors, (24611), 7310 states have internal predecessors, (24611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7311 states to 7311 states and 24611 transitions. [2021-07-13 20:21:03,232 INFO L78 Accepts]: Start accepts. Automaton has 7311 states and 24611 transitions. Word has length 36 [2021-07-13 20:21:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:03,232 INFO L482 AbstractCegarLoop]: Abstraction has 7311 states and 24611 transitions. [2021-07-13 20:21:03,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7311 states and 24611 transitions. [2021-07-13 20:21:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:03,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:03,243 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:03,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:03,444 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash 13295137, now seen corresponding path program 121 times [2021-07-13 20:21:03,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:03,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976043299] [2021-07-13 20:21:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:03,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:03,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976043299] [2021-07-13 20:21:03,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976043299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:03,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681719123] [2021-07-13 20:21:03,778 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 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 [2021-07-13 20:21:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:21:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:04,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681719123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:04,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:04,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:21:04,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358245445] [2021-07-13 20:21:04,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:21:04,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:04,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:21:04,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:21:04,346 INFO L87 Difference]: Start difference. First operand 7311 states and 24611 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:09,086 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-13 20:21:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:09,552 INFO L93 Difference]: Finished difference Result 15156 states and 47855 transitions. [2021-07-13 20:21:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:21:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:09,580 INFO L225 Difference]: With dead ends: 15156 [2021-07-13 20:21:09,581 INFO L226 Difference]: Without dead ends: 15007 [2021-07-13 20:21:09,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4359 ImplicationChecksByTransitivity, 4605.5ms TimeCoverageRelationStatistics Valid=1899, Invalid=10533, Unknown=0, NotChecked=0, Total=12432 [2021-07-13 20:21:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15007 states. [2021-07-13 20:21:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15007 to 7453. [2021-07-13 20:21:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.3699677938808374) internal successors, (25113), 7452 states have internal predecessors, (25113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25113 transitions. [2021-07-13 20:21:09,770 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25113 transitions. Word has length 36 [2021-07-13 20:21:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:09,770 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25113 transitions. [2021-07-13 20:21:09,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25113 transitions. [2021-07-13 20:21:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:09,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:09,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:09,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable870,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:09,981 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash 934997277, now seen corresponding path program 122 times [2021-07-13 20:21:09,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:09,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705658239] [2021-07-13 20:21:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705658239] [2021-07-13 20:21:10,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705658239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125712440] [2021-07-13 20:21:10,252 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 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 [2021-07-13 20:21:10,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:10,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:21:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125712440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:10,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:21:10,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495264096] [2021-07-13 20:21:10,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:21:10,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:21:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:10,833 INFO L87 Difference]: Start difference. First operand 7453 states and 25113 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,226 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-07-13 20:21:15,631 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-13 20:21:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:16,388 INFO L93 Difference]: Finished difference Result 15744 states and 49708 transitions. [2021-07-13 20:21:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:21:16,389 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:16,416 INFO L225 Difference]: With dead ends: 15744 [2021-07-13 20:21:16,416 INFO L226 Difference]: Without dead ends: 15526 [2021-07-13 20:21:16,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 4641.8ms TimeCoverageRelationStatistics Valid=2050, Invalid=10606, Unknown=0, NotChecked=0, Total=12656 [2021-07-13 20:21:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15526 states. [2021-07-13 20:21:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15526 to 7376. [2021-07-13 20:21:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.3716610169491523) internal successors, (24866), 7375 states have internal predecessors, (24866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24866 transitions. [2021-07-13 20:21:16,588 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24866 transitions. Word has length 36 [2021-07-13 20:21:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:16,588 INFO L482 AbstractCegarLoop]: Abstraction has 7376 states and 24866 transitions. [2021-07-13 20:21:16,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24866 transitions. [2021-07-13 20:21:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:16,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:16,598 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:16,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable874 [2021-07-13 20:21:16,799 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash -421189319, now seen corresponding path program 123 times [2021-07-13 20:21:16,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:16,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474876265] [2021-07-13 20:21:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:17,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:17,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474876265] [2021-07-13 20:21:17,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474876265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:17,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185577323] [2021-07-13 20:21:17,115 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 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 [2021-07-13 20:21:17,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:21:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:17,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185577323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:17,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:17,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:21:17,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227361188] [2021-07-13 20:21:17,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:21:17,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:21:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:21:17,760 INFO L87 Difference]: Start difference. First operand 7376 states and 24866 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:19,889 INFO L93 Difference]: Finished difference Result 10007 states and 32835 transitions. [2021-07-13 20:21:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:21:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:19,907 INFO L225 Difference]: With dead ends: 10007 [2021-07-13 20:21:19,907 INFO L226 Difference]: Without dead ends: 9893 [2021-07-13 20:21:19,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1924.6ms TimeCoverageRelationStatistics Valid=548, Invalid=3234, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:21:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9893 states. [2021-07-13 20:21:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9893 to 7503. [2021-07-13 20:21:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7503 states, 7502 states have (on average 3.374566782191416) internal successors, (25316), 7502 states have internal predecessors, (25316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7503 states to 7503 states and 25316 transitions. [2021-07-13 20:21:20,046 INFO L78 Accepts]: Start accepts. Automaton has 7503 states and 25316 transitions. Word has length 36 [2021-07-13 20:21:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:20,046 INFO L482 AbstractCegarLoop]: Abstraction has 7503 states and 25316 transitions. [2021-07-13 20:21:20,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7503 states and 25316 transitions. [2021-07-13 20:21:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:20,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:20,057 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:20,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:20,258 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash 430402785, now seen corresponding path program 124 times [2021-07-13 20:21:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:20,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124955327] [2021-07-13 20:21:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:20,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124955327] [2021-07-13 20:21:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124955327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656713366] [2021-07-13 20:21:20,598 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 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 [2021-07-13 20:21:20,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:21,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656713366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:21,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:21,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:21:21,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589381961] [2021-07-13 20:21:21,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:21:21,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:21,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:21:21,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:21,227 INFO L87 Difference]: Start difference. First operand 7503 states and 25316 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:23,352 INFO L93 Difference]: Finished difference Result 13800 states and 45369 transitions. [2021-07-13 20:21:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:21:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:23,382 INFO L225 Difference]: With dead ends: 13800 [2021-07-13 20:21:23,382 INFO L226 Difference]: Without dead ends: 13680 [2021-07-13 20:21:23,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1956.2ms TimeCoverageRelationStatistics Valid=606, Invalid=3054, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:21:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13680 states. [2021-07-13 20:21:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13680 to 7522. [2021-07-13 20:21:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7522 states, 7521 states have (on average 3.37481717856668) internal successors, (25382), 7521 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7522 states to 7522 states and 25382 transitions. [2021-07-13 20:21:23,589 INFO L78 Accepts]: Start accepts. Automaton has 7522 states and 25382 transitions. Word has length 36 [2021-07-13 20:21:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:23,589 INFO L482 AbstractCegarLoop]: Abstraction has 7522 states and 25382 transitions. [2021-07-13 20:21:23,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7522 states and 25382 transitions. [2021-07-13 20:21:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:23,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:23,601 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:23,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-07-13 20:21:23,805 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1142518539, now seen corresponding path program 125 times [2021-07-13 20:21:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717588499] [2021-07-13 20:21:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:24,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717588499] [2021-07-13 20:21:24,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717588499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071951611] [2021-07-13 20:21:24,078 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 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 [2021-07-13 20:21:24,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:21:24,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:24,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071951611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:24,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:21:24,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041686539] [2021-07-13 20:21:24,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:21:24,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:21:24,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:21:24,662 INFO L87 Difference]: Start difference. First operand 7522 states and 25382 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:28,405 INFO L93 Difference]: Finished difference Result 11084 states and 35678 transitions. [2021-07-13 20:21:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:21:28,405 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:28,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:28,426 INFO L225 Difference]: With dead ends: 11084 [2021-07-13 20:21:28,426 INFO L226 Difference]: Without dead ends: 10923 [2021-07-13 20:21:28,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 3314.2ms TimeCoverageRelationStatistics Valid=1072, Invalid=7484, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:21:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2021-07-13 20:21:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 7569. [2021-07-13 20:21:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7569 states, 7568 states have (on average 3.376321353065539) internal successors, (25552), 7568 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7569 states to 7569 states and 25552 transitions. [2021-07-13 20:21:28,580 INFO L78 Accepts]: Start accepts. Automaton has 7569 states and 25552 transitions. Word has length 36 [2021-07-13 20:21:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:28,580 INFO L482 AbstractCegarLoop]: Abstraction has 7569 states and 25552 transitions. [2021-07-13 20:21:28,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7569 states and 25552 transitions. [2021-07-13 20:21:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:28,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:28,591 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:28,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-07-13 20:21:28,793 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -150024975, now seen corresponding path program 126 times [2021-07-13 20:21:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:28,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754864852] [2021-07-13 20:21:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:29,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:29,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754864852] [2021-07-13 20:21:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754864852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:29,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596363010] [2021-07-13 20:21:29,056 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 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 [2021-07-13 20:21:29,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:21:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:29,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596363010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:29,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:29,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:21:29,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793183568] [2021-07-13 20:21:29,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:21:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:21:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:29,703 INFO L87 Difference]: Start difference. First operand 7569 states and 25552 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:33,696 INFO L93 Difference]: Finished difference Result 12384 states and 39625 transitions. [2021-07-13 20:21:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:21:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:33,718 INFO L225 Difference]: With dead ends: 12384 [2021-07-13 20:21:33,718 INFO L226 Difference]: Without dead ends: 12188 [2021-07-13 20:21:33,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 3338.9ms TimeCoverageRelationStatistics Valid=1182, Invalid=7938, Unknown=0, NotChecked=0, Total=9120 [2021-07-13 20:21:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12188 states. [2021-07-13 20:21:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12188 to 7569. [2021-07-13 20:21:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7569 states, 7568 states have (on average 3.376321353065539) internal successors, (25552), 7568 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7569 states to 7569 states and 25552 transitions. [2021-07-13 20:21:33,885 INFO L78 Accepts]: Start accepts. Automaton has 7569 states and 25552 transitions. Word has length 36 [2021-07-13 20:21:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:33,886 INFO L482 AbstractCegarLoop]: Abstraction has 7569 states and 25552 transitions. [2021-07-13 20:21:33,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7569 states and 25552 transitions. [2021-07-13 20:21:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:33,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:33,897 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:34,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable896 [2021-07-13 20:21:34,098 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1193707165, now seen corresponding path program 127 times [2021-07-13 20:21:34,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:34,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152219671] [2021-07-13 20:21:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:34,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152219671] [2021-07-13 20:21:34,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152219671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757673676] [2021-07-13 20:21:34,362 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 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 [2021-07-13 20:21:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:34,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757673676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:34,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:34,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:21:34,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884496638] [2021-07-13 20:21:34,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:21:34,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:21:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:21:34,989 INFO L87 Difference]: Start difference. First operand 7569 states and 25552 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:38,124 INFO L93 Difference]: Finished difference Result 10468 states and 33900 transitions. [2021-07-13 20:21:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:21:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:38,143 INFO L225 Difference]: With dead ends: 10468 [2021-07-13 20:21:38,143 INFO L226 Difference]: Without dead ends: 10307 [2021-07-13 20:21:38,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2707.4ms TimeCoverageRelationStatistics Valid=983, Invalid=6327, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:21:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10307 states. [2021-07-13 20:21:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10307 to 7589. [2021-07-13 20:21:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.375724828676858) internal successors, (25615), 7588 states have internal predecessors, (25615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25615 transitions. [2021-07-13 20:21:38,302 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25615 transitions. Word has length 36 [2021-07-13 20:21:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:38,302 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25615 transitions. [2021-07-13 20:21:38,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25615 transitions. [2021-07-13 20:21:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:38,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:38,315 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:38,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:38,515 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1911275165, now seen corresponding path program 128 times [2021-07-13 20:21:38,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:38,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90350590] [2021-07-13 20:21:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:38,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90350590] [2021-07-13 20:21:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90350590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233503217] [2021-07-13 20:21:38,784 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 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 [2021-07-13 20:21:38,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:39,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233503217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:39,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:39,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:21:39,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863334621] [2021-07-13 20:21:39,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:21:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:21:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:39,358 INFO L87 Difference]: Start difference. First operand 7589 states and 25615 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:43,149 INFO L93 Difference]: Finished difference Result 12946 states and 41603 transitions. [2021-07-13 20:21:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:21:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:43,175 INFO L225 Difference]: With dead ends: 12946 [2021-07-13 20:21:43,175 INFO L226 Difference]: Without dead ends: 12735 [2021-07-13 20:21:43,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 3201.7ms TimeCoverageRelationStatistics Valid=1319, Invalid=7237, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:21:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12735 states. [2021-07-13 20:21:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12735 to 7593. [2021-07-13 20:21:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7592 states have (on average 3.375790305584826) internal successors, (25629), 7592 states have internal predecessors, (25629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 25629 transitions. [2021-07-13 20:21:43,348 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 25629 transitions. Word has length 36 [2021-07-13 20:21:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:43,348 INFO L482 AbstractCegarLoop]: Abstraction has 7593 states and 25629 transitions. [2021-07-13 20:21:43,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 25629 transitions. [2021-07-13 20:21:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:43,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:43,360 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:43,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:43,561 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash 92065249, now seen corresponding path program 129 times [2021-07-13 20:21:43,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:43,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885649357] [2021-07-13 20:21:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:43,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885649357] [2021-07-13 20:21:43,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885649357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021638107] [2021-07-13 20:21:43,947 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 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 [2021-07-13 20:21:43,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:21:43,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:43,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:44,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021638107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:44,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:44,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:21:44,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523693529] [2021-07-13 20:21:44,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:21:44,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:21:44,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:21:44,477 INFO L87 Difference]: Start difference. First operand 7593 states and 25629 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:46,753 INFO L93 Difference]: Finished difference Result 11841 states and 39133 transitions. [2021-07-13 20:21:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:21:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:46,778 INFO L225 Difference]: With dead ends: 11841 [2021-07-13 20:21:46,778 INFO L226 Difference]: Without dead ends: 11712 [2021-07-13 20:21:46,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2022.7ms TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:21:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2021-07-13 20:21:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 7577. [2021-07-13 20:21:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.3759239704329462) internal successors, (25576), 7576 states have internal predecessors, (25576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25576 transitions. [2021-07-13 20:21:46,931 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25576 transitions. Word has length 36 [2021-07-13 20:21:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:46,931 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25576 transitions. [2021-07-13 20:21:46,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25576 transitions. [2021-07-13 20:21:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:46,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:46,941 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:47,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable908 [2021-07-13 20:21:47,142 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:47,142 INFO L82 PathProgramCache]: Analyzing trace with hash 560936349, now seen corresponding path program 130 times [2021-07-13 20:21:47,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:47,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684210662] [2021-07-13 20:21:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684210662] [2021-07-13 20:21:47,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684210662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914794536] [2021-07-13 20:21:47,371 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 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 [2021-07-13 20:21:47,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914794536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:47,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:21:47,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826739455] [2021-07-13 20:21:47,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:21:47,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:21:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:47,976 INFO L87 Difference]: Start difference. First operand 7577 states and 25576 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:50,027 INFO L93 Difference]: Finished difference Result 16016 states and 53068 transitions. [2021-07-13 20:21:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:21:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:50,063 INFO L225 Difference]: With dead ends: 16016 [2021-07-13 20:21:50,063 INFO L226 Difference]: Without dead ends: 15936 [2021-07-13 20:21:50,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1780.1ms TimeCoverageRelationStatistics Valid=751, Invalid=3281, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:21:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15936 states. [2021-07-13 20:21:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15936 to 8294. [2021-07-13 20:21:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8294 states, 8293 states have (on average 3.406125648136983) internal successors, (28247), 8293 states have internal predecessors, (28247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8294 states to 8294 states and 28247 transitions. [2021-07-13 20:21:50,313 INFO L78 Accepts]: Start accepts. Automaton has 8294 states and 28247 transitions. Word has length 36 [2021-07-13 20:21:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 8294 states and 28247 transitions. [2021-07-13 20:21:50,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 8294 states and 28247 transitions. [2021-07-13 20:21:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:50,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:50,326 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:50,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-13 20:21:50,526 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash 597695217, now seen corresponding path program 131 times [2021-07-13 20:21:50,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:50,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77768632] [2021-07-13 20:21:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:50,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:50,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77768632] [2021-07-13 20:21:50,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77768632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:50,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64443599] [2021-07-13 20:21:50,911 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 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 [2021-07-13 20:21:50,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:21:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:21:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:51,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64443599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:51,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:51,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:21:51,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561511084] [2021-07-13 20:21:51,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:21:51,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:21:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:51,507 INFO L87 Difference]: Start difference. First operand 8294 states and 28247 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:53,005 INFO L93 Difference]: Finished difference Result 14986 states and 49691 transitions. [2021-07-13 20:21:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:21:53,005 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:53,038 INFO L225 Difference]: With dead ends: 14986 [2021-07-13 20:21:53,038 INFO L226 Difference]: Without dead ends: 14906 [2021-07-13 20:21:53,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1522.3ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:21:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14906 states. [2021-07-13 20:21:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14906 to 8282. [2021-07-13 20:21:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8281 states have (on average 3.400917763555126) internal successors, (28163), 8281 states have internal predecessors, (28163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 28163 transitions. [2021-07-13 20:21:53,231 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 28163 transitions. Word has length 36 [2021-07-13 20:21:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:53,231 INFO L482 AbstractCegarLoop]: Abstraction has 8282 states and 28163 transitions. [2021-07-13 20:21:53,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 28163 transitions. [2021-07-13 20:21:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:53,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:53,247 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:53,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:53,470 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1798102489, now seen corresponding path program 132 times [2021-07-13 20:21:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:53,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684438897] [2021-07-13 20:21:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:53,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684438897] [2021-07-13 20:21:53,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684438897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124334331] [2021-07-13 20:21:53,725 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 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 [2021-07-13 20:21:53,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:21:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:21:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:54,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124334331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:54,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:54,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:21:54,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692432956] [2021-07-13 20:21:54,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:21:54,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:21:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:21:54,374 INFO L87 Difference]: Start difference. First operand 8282 states and 28163 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:59,717 INFO L93 Difference]: Finished difference Result 14823 states and 47560 transitions. [2021-07-13 20:21:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:21:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:21:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:59,745 INFO L225 Difference]: With dead ends: 14823 [2021-07-13 20:21:59,745 INFO L226 Difference]: Without dead ends: 14544 [2021-07-13 20:21:59,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 3820.8ms TimeCoverageRelationStatistics Valid=1460, Invalid=10530, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:21:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14544 states. [2021-07-13 20:21:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14544 to 8334. [2021-07-13 20:21:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8334 states, 8333 states have (on average 3.40465618624745) internal successors, (28371), 8333 states have internal predecessors, (28371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8334 states to 8334 states and 28371 transitions. [2021-07-13 20:21:59,926 INFO L78 Accepts]: Start accepts. Automaton has 8334 states and 28371 transitions. Word has length 36 [2021-07-13 20:21:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:59,926 INFO L482 AbstractCegarLoop]: Abstraction has 8334 states and 28371 transitions. [2021-07-13 20:21:59,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 8334 states and 28371 transitions. [2021-07-13 20:21:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:21:59,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:59,939 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:00,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-07-13 20:22:00,140 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1447477403, now seen corresponding path program 133 times [2021-07-13 20:22:00,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:00,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996111051] [2021-07-13 20:22:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:00,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:00,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996111051] [2021-07-13 20:22:00,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996111051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:00,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639386705] [2021-07-13 20:22:00,379 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 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 [2021-07-13 20:22:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639386705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:01,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:01,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:22:01,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786188904] [2021-07-13 20:22:01,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:22:01,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:01,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:22:01,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:22:01,023 INFO L87 Difference]: Start difference. First operand 8334 states and 28371 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:05,664 INFO L93 Difference]: Finished difference Result 16304 states and 51950 transitions. [2021-07-13 20:22:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:22:05,665 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:05,697 INFO L225 Difference]: With dead ends: 16304 [2021-07-13 20:22:05,698 INFO L226 Difference]: Without dead ends: 16158 [2021-07-13 20:22:05,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3754 ImplicationChecksByTransitivity, 3747.8ms TimeCoverageRelationStatistics Valid=1759, Invalid=9583, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:22:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2021-07-13 20:22:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 8345. [2021-07-13 20:22:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 8344 states have (on average 3.405680728667306) internal successors, (28417), 8344 states have internal predecessors, (28417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 28417 transitions. [2021-07-13 20:22:05,927 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 28417 transitions. Word has length 36 [2021-07-13 20:22:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:05,927 INFO L482 AbstractCegarLoop]: Abstraction has 8345 states and 28417 transitions. [2021-07-13 20:22:05,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 28417 transitions. [2021-07-13 20:22:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:05,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:05,940 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:06,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-07-13 20:22:06,140 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -525775263, now seen corresponding path program 134 times [2021-07-13 20:22:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:06,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638074399] [2021-07-13 20:22:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:06,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638074399] [2021-07-13 20:22:06,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638074399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266870419] [2021-07-13 20:22:06,379 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 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 [2021-07-13 20:22:06,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:06,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:06,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:06,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266870419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:06,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:22:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300036063] [2021-07-13 20:22:06,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:22:06,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:06,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:22:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:22:06,961 INFO L87 Difference]: Start difference. First operand 8345 states and 28417 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:12,191 INFO L93 Difference]: Finished difference Result 16648 states and 53060 transitions. [2021-07-13 20:22:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-13 20:22:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:12,224 INFO L225 Difference]: With dead ends: 16648 [2021-07-13 20:22:12,224 INFO L226 Difference]: Without dead ends: 16476 [2021-07-13 20:22:12,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4021 ImplicationChecksByTransitivity, 3985.2ms TimeCoverageRelationStatistics Valid=1972, Invalid=10018, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:22:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16476 states. [2021-07-13 20:22:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16476 to 8338. [2021-07-13 20:22:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 3.4049418255967376) internal successors, (28387), 8337 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 28387 transitions. [2021-07-13 20:22:12,464 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 28387 transitions. Word has length 36 [2021-07-13 20:22:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:12,464 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 28387 transitions. [2021-07-13 20:22:12,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 28387 transitions. [2021-07-13 20:22:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:12,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:12,477 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:12,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:12,678 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:12,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1321680997, now seen corresponding path program 135 times [2021-07-13 20:22:12,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:12,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234716378] [2021-07-13 20:22:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234716378] [2021-07-13 20:22:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234716378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810396320] [2021-07-13 20:22:12,996 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 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 [2021-07-13 20:22:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:22:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:22:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810396320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:22:13,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060766414] [2021-07-13 20:22:13,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:22:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:22:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:22:13,613 INFO L87 Difference]: Start difference. First operand 8338 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:16,978 INFO L93 Difference]: Finished difference Result 13694 states and 44217 transitions. [2021-07-13 20:22:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:22:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:17,006 INFO L225 Difference]: With dead ends: 13694 [2021-07-13 20:22:17,006 INFO L226 Difference]: Without dead ends: 13550 [2021-07-13 20:22:17,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2740.3ms TimeCoverageRelationStatistics Valid=1012, Invalid=5468, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:22:17,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13550 states. [2021-07-13 20:22:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13550 to 8370. [2021-07-13 20:22:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8370 states, 8369 states have (on average 3.407217110765922) internal successors, (28515), 8369 states have internal predecessors, (28515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8370 states to 8370 states and 28515 transitions. [2021-07-13 20:22:17,218 INFO L78 Accepts]: Start accepts. Automaton has 8370 states and 28515 transitions. Word has length 36 [2021-07-13 20:22:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:17,218 INFO L482 AbstractCegarLoop]: Abstraction has 8370 states and 28515 transitions. [2021-07-13 20:22:17,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 8370 states and 28515 transitions. [2021-07-13 20:22:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:17,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:17,230 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:17,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:17,431 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash -767443099, now seen corresponding path program 136 times [2021-07-13 20:22:17,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:17,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37343039] [2021-07-13 20:22:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:17,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37343039] [2021-07-13 20:22:17,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37343039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165919149] [2021-07-13 20:22:17,672 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 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 [2021-07-13 20:22:17,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:17,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:17,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:18,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165919149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:18,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:18,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:22:18,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126047299] [2021-07-13 20:22:18,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:22:18,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:22:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:22:18,295 INFO L87 Difference]: Start difference. First operand 8370 states and 28515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:22,279 INFO L93 Difference]: Finished difference Result 16258 states and 51825 transitions. [2021-07-13 20:22:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:22:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:22,312 INFO L225 Difference]: With dead ends: 16258 [2021-07-13 20:22:22,312 INFO L226 Difference]: Without dead ends: 16112 [2021-07-13 20:22:22,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3167.5ms TimeCoverageRelationStatistics Valid=1520, Invalid=7600, Unknown=0, NotChecked=0, Total=9120 [2021-07-13 20:22:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16112 states. [2021-07-13 20:22:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16112 to 8373. [2021-07-13 20:22:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8373 states, 8372 states have (on average 3.407668418537984) internal successors, (28529), 8372 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8373 states to 8373 states and 28529 transitions. [2021-07-13 20:22:22,564 INFO L78 Accepts]: Start accepts. Automaton has 8373 states and 28529 transitions. Word has length 36 [2021-07-13 20:22:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:22,564 INFO L482 AbstractCegarLoop]: Abstraction has 8373 states and 28529 transitions. [2021-07-13 20:22:22,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 8373 states and 28529 transitions. [2021-07-13 20:22:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:22,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:22,577 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:22,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-07-13 20:22:22,777 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:22,778 INFO L82 PathProgramCache]: Analyzing trace with hash 154259041, now seen corresponding path program 137 times [2021-07-13 20:22:22,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:22,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135104338] [2021-07-13 20:22:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:23,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135104338] [2021-07-13 20:22:23,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135104338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483135222] [2021-07-13 20:22:23,021 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 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 [2021-07-13 20:22:23,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:22:23,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483135222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:23,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:22:23,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218210557] [2021-07-13 20:22:23,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:22:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:22:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:22:23,634 INFO L87 Difference]: Start difference. First operand 8373 states and 28529 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:28,229 INFO L93 Difference]: Finished difference Result 16894 states and 53816 transitions. [2021-07-13 20:22:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:22:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:28,260 INFO L225 Difference]: With dead ends: 16894 [2021-07-13 20:22:28,261 INFO L226 Difference]: Without dead ends: 16722 [2021-07-13 20:22:28,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 3465.9ms TimeCoverageRelationStatistics Valid=1612, Invalid=8090, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:22:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16722 states. [2021-07-13 20:22:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16722 to 8344. [2021-07-13 20:22:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8344 states, 8343 states have (on average 3.405369771065564) internal successors, (28411), 8343 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) [2021-07-13 20:22:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8344 states to 8344 states and 28411 transitions. [2021-07-13 20:22:28,474 INFO L78 Accepts]: Start accepts. Automaton has 8344 states and 28411 transitions. Word has length 36 [2021-07-13 20:22:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:28,474 INFO L482 AbstractCegarLoop]: Abstraction has 8344 states and 28411 transitions. [2021-07-13 20:22:28,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 8344 states and 28411 transitions. [2021-07-13 20:22:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:28,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:28,486 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:28,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:28,687 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash -965334139, now seen corresponding path program 138 times [2021-07-13 20:22:28,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:28,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220050187] [2021-07-13 20:22:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:28,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:28,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220050187] [2021-07-13 20:22:28,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220050187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:28,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170928384] [2021-07-13 20:22:28,955 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 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 [2021-07-13 20:22:28,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:22:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:29,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170928384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:29,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:29,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-07-13 20:22:29,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434417504] [2021-07-13 20:22:29,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:22:29,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:29,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:22:29,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:22:29,559 INFO L87 Difference]: Start difference. First operand 8344 states and 28411 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:34,706 INFO L93 Difference]: Finished difference Result 14704 states and 47206 transitions. [2021-07-13 20:22:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:22:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:34,734 INFO L225 Difference]: With dead ends: 14704 [2021-07-13 20:22:34,734 INFO L226 Difference]: Without dead ends: 14425 [2021-07-13 20:22:34,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 3844.9ms TimeCoverageRelationStatistics Valid=1395, Invalid=10815, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:22:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14425 states. [2021-07-13 20:22:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14425 to 8328. [2021-07-13 20:22:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 8327 states have (on average 3.4035066650654495) internal successors, (28341), 8327 states have internal predecessors, (28341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 28341 transitions. [2021-07-13 20:22:34,914 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 28341 transitions. Word has length 36 [2021-07-13 20:22:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:34,914 INFO L482 AbstractCegarLoop]: Abstraction has 8328 states and 28341 transitions. [2021-07-13 20:22:34,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 28341 transitions. [2021-07-13 20:22:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:34,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:34,927 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:35,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-07-13 20:22:35,127 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash 84053265, now seen corresponding path program 139 times [2021-07-13 20:22:35,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:35,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815016048] [2021-07-13 20:22:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:35,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:35,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815016048] [2021-07-13 20:22:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815016048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:35,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314520637] [2021-07-13 20:22:35,380 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 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 [2021-07-13 20:22:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:36,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314520637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:36,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:36,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:22:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972799222] [2021-07-13 20:22:36,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:22:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:22:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:22:36,049 INFO L87 Difference]: Start difference. First operand 8328 states and 28341 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:40,766 INFO L93 Difference]: Finished difference Result 16126 states and 51393 transitions. [2021-07-13 20:22:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:22:40,766 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:40,798 INFO L225 Difference]: With dead ends: 16126 [2021-07-13 20:22:40,798 INFO L226 Difference]: Without dead ends: 15980 [2021-07-13 20:22:40,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 3747.9ms TimeCoverageRelationStatistics Valid=1710, Invalid=9846, Unknown=0, NotChecked=0, Total=11556 [2021-07-13 20:22:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15980 states. [2021-07-13 20:22:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15980 to 8339. [2021-07-13 20:22:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8339 states, 8338 states have (on average 3.4045334612616935) internal successors, (28387), 8338 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8339 states to 8339 states and 28387 transitions. [2021-07-13 20:22:41,018 INFO L78 Accepts]: Start accepts. Automaton has 8339 states and 28387 transitions. Word has length 36 [2021-07-13 20:22:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:41,018 INFO L482 AbstractCegarLoop]: Abstraction has 8339 states and 28387 transitions. [2021-07-13 20:22:41,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8339 states and 28387 transitions. [2021-07-13 20:22:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:41,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:41,031 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:41,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-13 20:22:41,231 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:41,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1005755405, now seen corresponding path program 140 times [2021-07-13 20:22:41,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:41,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240923147] [2021-07-13 20:22:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:41,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240923147] [2021-07-13 20:22:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240923147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187493869] [2021-07-13 20:22:41,537 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 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 [2021-07-13 20:22:41,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:41,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187493869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:42,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:42,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:22:42,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121417347] [2021-07-13 20:22:42,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:22:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:22:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:22:42,125 INFO L87 Difference]: Start difference. First operand 8339 states and 28387 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:47,319 INFO L93 Difference]: Finished difference Result 16497 states and 52600 transitions. [2021-07-13 20:22:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-13 20:22:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:47,351 INFO L225 Difference]: With dead ends: 16497 [2021-07-13 20:22:47,351 INFO L226 Difference]: Without dead ends: 16325 [2021-07-13 20:22:47,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4130 ImplicationChecksByTransitivity, 4046.7ms TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:22:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-07-13 20:22:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 8304. [2021-07-13 20:22:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8304 states, 8303 states have (on average 3.4017824882572563) internal successors, (28245), 8303 states have internal predecessors, (28245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8304 states to 8304 states and 28245 transitions. [2021-07-13 20:22:47,550 INFO L78 Accepts]: Start accepts. Automaton has 8304 states and 28245 transitions. Word has length 36 [2021-07-13 20:22:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:47,550 INFO L482 AbstractCegarLoop]: Abstraction has 8304 states and 28245 transitions. [2021-07-13 20:22:47,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8304 states and 28245 transitions. [2021-07-13 20:22:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:47,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:47,563 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:47,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-07-13 20:22:47,763 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1462820445, now seen corresponding path program 141 times [2021-07-13 20:22:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:47,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284859276] [2021-07-13 20:22:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:48,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284859276] [2021-07-13 20:22:48,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284859276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045247451] [2021-07-13 20:22:48,022 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 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 [2021-07-13 20:22:48,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:22:48,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045247451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:48,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:22:48,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729033599] [2021-07-13 20:22:48,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:22:48,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:22:48,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:22:48,611 INFO L87 Difference]: Start difference. First operand 8304 states and 28245 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:51,029 INFO L93 Difference]: Finished difference Result 9903 states and 32738 transitions. [2021-07-13 20:22:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:22:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:51,049 INFO L225 Difference]: With dead ends: 9903 [2021-07-13 20:22:51,049 INFO L226 Difference]: Without dead ends: 9618 [2021-07-13 20:22:51,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1981.2ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:22:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9618 states. [2021-07-13 20:22:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9618 to 8500. [2021-07-13 20:22:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8500 states, 8499 states have (on average 3.3908695140604777) internal successors, (28819), 8499 states have internal predecessors, (28819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8500 states to 8500 states and 28819 transitions. [2021-07-13 20:22:51,212 INFO L78 Accepts]: Start accepts. Automaton has 8500 states and 28819 transitions. Word has length 36 [2021-07-13 20:22:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:51,212 INFO L482 AbstractCegarLoop]: Abstraction has 8500 states and 28819 transitions. [2021-07-13 20:22:51,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 8500 states and 28819 transitions. [2021-07-13 20:22:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:51,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:51,225 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:51,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:51,425 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1769049631, now seen corresponding path program 142 times [2021-07-13 20:22:51,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:51,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851008751] [2021-07-13 20:22:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:51,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:51,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851008751] [2021-07-13 20:22:51,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851008751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:51,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673149251] [2021-07-13 20:22:51,701 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 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 [2021-07-13 20:22:51,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:52,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673149251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:52,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:52,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:22:52,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290749073] [2021-07-13 20:22:52,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:22:52,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:22:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:22:52,356 INFO L87 Difference]: Start difference. First operand 8500 states and 28819 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:57,261 INFO L93 Difference]: Finished difference Result 15181 states and 48707 transitions. [2021-07-13 20:22:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-07-13 20:22:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:22:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:57,292 INFO L225 Difference]: With dead ends: 15181 [2021-07-13 20:22:57,292 INFO L226 Difference]: Without dead ends: 14873 [2021-07-13 20:22:57,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4683 ImplicationChecksByTransitivity, 3961.7ms TimeCoverageRelationStatistics Valid=2126, Invalid=11916, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:22:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14873 states. [2021-07-13 20:22:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14873 to 8525. [2021-07-13 20:22:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8525 states, 8524 states have (on average 3.392890661661192) internal successors, (28921), 8524 states have internal predecessors, (28921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8525 states to 8525 states and 28921 transitions. [2021-07-13 20:22:57,532 INFO L78 Accepts]: Start accepts. Automaton has 8525 states and 28921 transitions. Word has length 36 [2021-07-13 20:22:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:57,532 INFO L482 AbstractCegarLoop]: Abstraction has 8525 states and 28921 transitions. [2021-07-13 20:22:57,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 8525 states and 28921 transitions. [2021-07-13 20:22:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:22:57,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:57,545 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:57,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:57,746 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1051481631, now seen corresponding path program 143 times [2021-07-13 20:22:57,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:57,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15600740] [2021-07-13 20:22:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:58,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:58,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15600740] [2021-07-13 20:22:58,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15600740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:58,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480261639] [2021-07-13 20:22:58,004 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 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 [2021-07-13 20:22:58,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:22:58,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:22:58,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:59,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480261639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:59,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:59,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:22:59,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630435488] [2021-07-13 20:22:59,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:22:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:59,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:22:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:22:59,075 INFO L87 Difference]: Start difference. First operand 8525 states and 28921 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:02,988 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-13 20:23:03,426 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-13 20:23:04,413 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 20:23:04,601 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-13 20:23:04,783 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-13 20:23:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:05,441 INFO L93 Difference]: Finished difference Result 15198 states and 48800 transitions. [2021-07-13 20:23:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:23:05,441 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:05,474 INFO L225 Difference]: With dead ends: 15198 [2021-07-13 20:23:05,474 INFO L226 Difference]: Without dead ends: 15026 [2021-07-13 20:23:05,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 5700.9ms TimeCoverageRelationStatistics Valid=2068, Invalid=11272, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:23:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15026 states. [2021-07-13 20:23:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15026 to 8508. [2021-07-13 20:23:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8507 states have (on average 3.3914423416010346) internal successors, (28851), 8507 states have internal predecessors, (28851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 28851 transitions. [2021-07-13 20:23:05,730 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 28851 transitions. Word has length 36 [2021-07-13 20:23:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:05,730 INFO L482 AbstractCegarLoop]: Abstraction has 8508 states and 28851 transitions. [2021-07-13 20:23:05,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 28851 transitions. [2021-07-13 20:23:05,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:05,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:05,743 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:05,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-13 20:23:05,944 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1921485737, now seen corresponding path program 144 times [2021-07-13 20:23:05,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:05,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131542519] [2021-07-13 20:23:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:06,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131542519] [2021-07-13 20:23:06,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131542519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072825687] [2021-07-13 20:23:06,213 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 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 [2021-07-13 20:23:06,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:23:06,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:23:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:06,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072825687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:06,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:06,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:23:06,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117222774] [2021-07-13 20:23:06,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:23:06,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:23:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:23:06,707 INFO L87 Difference]: Start difference. First operand 8508 states and 28851 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:08,232 INFO L93 Difference]: Finished difference Result 10290 states and 34180 transitions. [2021-07-13 20:23:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:23:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:08,255 INFO L225 Difference]: With dead ends: 10290 [2021-07-13 20:23:08,255 INFO L226 Difference]: Without dead ends: 10019 [2021-07-13 20:23:08,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1322.7ms TimeCoverageRelationStatistics Valid=465, Invalid=2505, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:23:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10019 states. [2021-07-13 20:23:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10019 to 8581. [2021-07-13 20:23:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.3875291375291376) internal successors, (29065), 8580 states have internal predecessors, (29065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 29065 transitions. [2021-07-13 20:23:08,458 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 29065 transitions. Word has length 36 [2021-07-13 20:23:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:08,458 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 29065 transitions. [2021-07-13 20:23:08,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 29065 transitions. [2021-07-13 20:23:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:08,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:08,471 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:08,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-13 20:23:08,672 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 400378273, now seen corresponding path program 145 times [2021-07-13 20:23:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:08,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175222340] [2021-07-13 20:23:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:08,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175222340] [2021-07-13 20:23:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175222340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612582073] [2021-07-13 20:23:08,993 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 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 [2021-07-13 20:23:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:09,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612582073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:09,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:09,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:23:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563477758] [2021-07-13 20:23:09,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:23:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:23:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:23:09,668 INFO L87 Difference]: Start difference. First operand 8581 states and 29065 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:10,931 INFO L93 Difference]: Finished difference Result 9224 states and 30724 transitions. [2021-07-13 20:23:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:23:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:10,947 INFO L225 Difference]: With dead ends: 9224 [2021-07-13 20:23:10,947 INFO L226 Difference]: Without dead ends: 9127 [2021-07-13 20:23:10,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1381.6ms TimeCoverageRelationStatistics Valid=489, Invalid=2481, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:23:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9127 states. [2021-07-13 20:23:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9127 to 8549. [2021-07-13 20:23:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 3.3908516612073) internal successors, (28985), 8548 states have internal predecessors, (28985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 28985 transitions. [2021-07-13 20:23:11,086 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 28985 transitions. Word has length 36 [2021-07-13 20:23:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:11,086 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 28985 transitions. [2021-07-13 20:23:11,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 28985 transitions. [2021-07-13 20:23:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:11,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:11,098 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:11,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable999 [2021-07-13 20:23:11,299 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash 272407709, now seen corresponding path program 146 times [2021-07-13 20:23:11,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:11,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340224793] [2021-07-13 20:23:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:11,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340224793] [2021-07-13 20:23:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340224793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984670422] [2021-07-13 20:23:11,614 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 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 [2021-07-13 20:23:11,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:12,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984670422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:12,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:12,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:23:12,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581169777] [2021-07-13 20:23:12,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:23:12,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:23:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:23:12,239 INFO L87 Difference]: Start difference. First operand 8549 states and 28985 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:14,105 INFO L93 Difference]: Finished difference Result 9493 states and 31558 transitions. [2021-07-13 20:23:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:23:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:14,124 INFO L225 Difference]: With dead ends: 9493 [2021-07-13 20:23:14,124 INFO L226 Difference]: Without dead ends: 9379 [2021-07-13 20:23:14,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1576.9ms TimeCoverageRelationStatistics Valid=504, Invalid=2802, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:23:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2021-07-13 20:23:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 8675. [2021-07-13 20:23:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8675 states, 8674 states have (on average 3.3858658058565827) internal successors, (29369), 8674 states have internal predecessors, (29369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 29369 transitions. [2021-07-13 20:23:14,272 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 29369 transitions. Word has length 36 [2021-07-13 20:23:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:14,272 INFO L482 AbstractCegarLoop]: Abstraction has 8675 states and 29369 transitions. [2021-07-13 20:23:14,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 29369 transitions. [2021-07-13 20:23:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:14,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:14,285 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:14,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:14,486 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash -565519459, now seen corresponding path program 147 times [2021-07-13 20:23:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:14,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333719728] [2021-07-13 20:23:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:14,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333719728] [2021-07-13 20:23:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333719728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910961788] [2021-07-13 20:23:14,718 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 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 [2021-07-13 20:23:14,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:23:14,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:23:14,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:15,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910961788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:15,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:15,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:23:15,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617738988] [2021-07-13 20:23:15,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:23:15,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:15,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:23:15,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:23:15,274 INFO L87 Difference]: Start difference. First operand 8675 states and 29369 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:17,954 INFO L93 Difference]: Finished difference Result 9936 states and 32860 transitions. [2021-07-13 20:23:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:23:17,954 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:17,973 INFO L225 Difference]: With dead ends: 9936 [2021-07-13 20:23:17,974 INFO L226 Difference]: Without dead ends: 9699 [2021-07-13 20:23:17,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2000.8ms TimeCoverageRelationStatistics Valid=723, Invalid=4533, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:23:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9699 states. [2021-07-13 20:23:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9699 to 8619. [2021-07-13 20:23:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8619 states, 8618 states have (on average 3.3923184033418425) internal successors, (29235), 8618 states have internal predecessors, (29235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8619 states to 8619 states and 29235 transitions. [2021-07-13 20:23:18,138 INFO L78 Accepts]: Start accepts. Automaton has 8619 states and 29235 transitions. Word has length 36 [2021-07-13 20:23:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:18,138 INFO L482 AbstractCegarLoop]: Abstraction has 8619 states and 29235 transitions. [2021-07-13 20:23:18,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 8619 states and 29235 transitions. [2021-07-13 20:23:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:18,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:18,151 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:18,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1016 [2021-07-13 20:23:18,352 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:18,352 INFO L82 PathProgramCache]: Analyzing trace with hash -739747679, now seen corresponding path program 148 times [2021-07-13 20:23:18,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:18,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076886251] [2021-07-13 20:23:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:18,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:18,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076886251] [2021-07-13 20:23:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076886251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:18,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337367781] [2021-07-13 20:23:18,690 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 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 [2021-07-13 20:23:18,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:18,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:19,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337367781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:19,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:19,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:23:19,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744373577] [2021-07-13 20:23:19,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:23:19,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:23:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:23:19,302 INFO L87 Difference]: Start difference. First operand 8619 states and 29235 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:21,811 INFO L93 Difference]: Finished difference Result 13113 states and 42481 transitions. [2021-07-13 20:23:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:23:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:21,839 INFO L225 Difference]: With dead ends: 13113 [2021-07-13 20:23:21,839 INFO L226 Difference]: Without dead ends: 12901 [2021-07-13 20:23:21,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 2194.6ms TimeCoverageRelationStatistics Valid=1017, Invalid=5303, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:23:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12901 states. [2021-07-13 20:23:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12901 to 8627. [2021-07-13 20:23:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8627 states, 8626 states have (on average 3.3928819846974263) internal successors, (29267), 8626 states have internal predecessors, (29267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8627 states to 8627 states and 29267 transitions. [2021-07-13 20:23:22,018 INFO L78 Accepts]: Start accepts. Automaton has 8627 states and 29267 transitions. Word has length 36 [2021-07-13 20:23:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:22,018 INFO L482 AbstractCegarLoop]: Abstraction has 8627 states and 29267 transitions. [2021-07-13 20:23:22,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8627 states and 29267 transitions. [2021-07-13 20:23:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:22,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:22,032 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:22,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1020,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:22,232 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash -436172387, now seen corresponding path program 149 times [2021-07-13 20:23:22,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:22,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747431408] [2021-07-13 20:23:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:22,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:22,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747431408] [2021-07-13 20:23:22,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747431408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:22,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925504008] [2021-07-13 20:23:22,519 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 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 [2021-07-13 20:23:22,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:23:22,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:23:22,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:23,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925504008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:23,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:23,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:23:23,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560507835] [2021-07-13 20:23:23,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:23:23,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:23:23,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:23:23,121 INFO L87 Difference]: Start difference. First operand 8627 states and 29267 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:26,218 INFO L93 Difference]: Finished difference Result 14088 states and 45455 transitions. [2021-07-13 20:23:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:23:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:26,248 INFO L225 Difference]: With dead ends: 14088 [2021-07-13 20:23:26,248 INFO L226 Difference]: Without dead ends: 13888 [2021-07-13 20:23:26,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2534.1ms TimeCoverageRelationStatistics Valid=1226, Invalid=6606, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:23:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13888 states. [2021-07-13 20:23:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13888 to 8631. [2021-07-13 20:23:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 3.3931633835457706) internal successors, (29283), 8630 states have internal predecessors, (29283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 29283 transitions. [2021-07-13 20:23:26,468 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 29283 transitions. Word has length 36 [2021-07-13 20:23:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:26,469 INFO L482 AbstractCegarLoop]: Abstraction has 8631 states and 29283 transitions. [2021-07-13 20:23:26,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:26,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 29283 transitions. [2021-07-13 20:23:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:26,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:26,481 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:26,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-07-13 20:23:26,682 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1747774113, now seen corresponding path program 150 times [2021-07-13 20:23:26,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:26,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052748105] [2021-07-13 20:23:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:26,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:26,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052748105] [2021-07-13 20:23:26,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052748105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:26,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079323621] [2021-07-13 20:23:26,936 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 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 [2021-07-13 20:23:26,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:23:26,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:27,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079323621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:27,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:27,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:23:27,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527518517] [2021-07-13 20:23:27,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:23:27,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:23:27,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:23:27,550 INFO L87 Difference]: Start difference. First operand 8631 states and 29283 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:31,951 INFO L93 Difference]: Finished difference Result 15312 states and 49011 transitions. [2021-07-13 20:23:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:23:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:31,980 INFO L225 Difference]: With dead ends: 15312 [2021-07-13 20:23:31,980 INFO L226 Difference]: Without dead ends: 15129 [2021-07-13 20:23:31,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3301 ImplicationChecksByTransitivity, 3447.6ms TimeCoverageRelationStatistics Valid=1641, Invalid=8661, Unknown=0, NotChecked=0, Total=10302 [2021-07-13 20:23:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15129 states. [2021-07-13 20:23:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15129 to 8642. [2021-07-13 20:23:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8641 states have (on average 3.394167341742854) internal successors, (29329), 8641 states have internal predecessors, (29329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 29329 transitions. [2021-07-13 20:23:32,185 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 29329 transitions. Word has length 36 [2021-07-13 20:23:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:32,185 INFO L482 AbstractCegarLoop]: Abstraction has 8642 states and 29329 transitions. [2021-07-13 20:23:32,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 29329 transitions. [2021-07-13 20:23:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:32,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:32,198 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:32,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-07-13 20:23:32,398 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1634376375, now seen corresponding path program 151 times [2021-07-13 20:23:32,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:32,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362918622] [2021-07-13 20:23:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:32,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:32,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362918622] [2021-07-13 20:23:32,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362918622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:32,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519304564] [2021-07-13 20:23:32,714 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 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 [2021-07-13 20:23:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:33,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519304564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:33,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:33,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:23:33,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995044371] [2021-07-13 20:23:33,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:23:33,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:33,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:23:33,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:23:33,397 INFO L87 Difference]: Start difference. First operand 8642 states and 29329 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:34,612 INFO L93 Difference]: Finished difference Result 9351 states and 31188 transitions. [2021-07-13 20:23:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:23:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:34,631 INFO L225 Difference]: With dead ends: 9351 [2021-07-13 20:23:34,632 INFO L226 Difference]: Without dead ends: 9270 [2021-07-13 20:23:34,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1433.5ms TimeCoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:23:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2021-07-13 20:23:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 8684. [2021-07-13 20:23:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.3911090636876655) internal successors, (29445), 8683 states have internal predecessors, (29445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 29445 transitions. [2021-07-13 20:23:34,781 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 29445 transitions. Word has length 36 [2021-07-13 20:23:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:34,781 INFO L482 AbstractCegarLoop]: Abstraction has 8684 states and 29445 transitions. [2021-07-13 20:23:34,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 29445 transitions. [2021-07-13 20:23:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:34,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:34,794 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:34,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:34,995 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1822663753, now seen corresponding path program 152 times [2021-07-13 20:23:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227558808] [2021-07-13 20:23:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:35,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227558808] [2021-07-13 20:23:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227558808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143772596] [2021-07-13 20:23:35,230 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 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 [2021-07-13 20:23:35,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:23:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143772596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:35,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:35,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:23:35,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978191515] [2021-07-13 20:23:35,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:23:35,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:23:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:23:35,785 INFO L87 Difference]: Start difference. First operand 8684 states and 29445 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:38,138 INFO L93 Difference]: Finished difference Result 9925 states and 32866 transitions. [2021-07-13 20:23:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:23:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:38,157 INFO L225 Difference]: With dead ends: 9925 [2021-07-13 20:23:38,157 INFO L226 Difference]: Without dead ends: 9684 [2021-07-13 20:23:38,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2042.1ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:23:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9684 states. [2021-07-13 20:23:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 8666. [2021-07-13 20:23:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 8665 states have (on average 3.39399884593191) internal successors, (29409), 8665 states have internal predecessors, (29409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 29409 transitions. [2021-07-13 20:23:38,319 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 29409 transitions. Word has length 36 [2021-07-13 20:23:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:38,319 INFO L482 AbstractCegarLoop]: Abstraction has 8666 states and 29409 transitions. [2021-07-13 20:23:38,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 29409 transitions. [2021-07-13 20:23:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:38,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:38,332 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:38,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:38,533 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1812343479, now seen corresponding path program 153 times [2021-07-13 20:23:38,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:38,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376018927] [2021-07-13 20:23:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:38,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:38,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376018927] [2021-07-13 20:23:38,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376018927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:38,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989176739] [2021-07-13 20:23:38,846 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 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 [2021-07-13 20:23:38,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:23:38,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:38,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:38,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989176739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:39,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:39,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:23:39,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216191120] [2021-07-13 20:23:39,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:23:39,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:39,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:23:39,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:23:39,529 INFO L87 Difference]: Start difference. First operand 8666 states and 29409 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:41,305 INFO L93 Difference]: Finished difference Result 10554 states and 34993 transitions. [2021-07-13 20:23:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:23:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:41,326 INFO L225 Difference]: With dead ends: 10554 [2021-07-13 20:23:41,326 INFO L226 Difference]: Without dead ends: 10440 [2021-07-13 20:23:41,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1776.5ms TimeCoverageRelationStatistics Valid=611, Invalid=3295, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:23:41,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2021-07-13 20:23:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 8680. [2021-07-13 20:23:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8679 states have (on average 3.396819910127895) internal successors, (29481), 8679 states have internal predecessors, (29481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 29481 transitions. [2021-07-13 20:23:41,489 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 29481 transitions. Word has length 36 [2021-07-13 20:23:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:41,490 INFO L482 AbstractCegarLoop]: Abstraction has 8680 states and 29481 transitions. [2021-07-13 20:23:41,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 29481 transitions. [2021-07-13 20:23:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:41,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:41,503 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:41,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1046 [2021-07-13 20:23:41,703 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1648435533, now seen corresponding path program 154 times [2021-07-13 20:23:41,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:41,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342809173] [2021-07-13 20:23:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:42,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:42,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342809173] [2021-07-13 20:23:42,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342809173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:42,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989464014] [2021-07-13 20:23:42,022 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 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 [2021-07-13 20:23:42,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:42,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989464014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:42,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:42,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:23:42,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022790375] [2021-07-13 20:23:42,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:23:42,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:23:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:23:42,676 INFO L87 Difference]: Start difference. First operand 8680 states and 29481 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:45,423 INFO L93 Difference]: Finished difference Result 13140 states and 42592 transitions. [2021-07-13 20:23:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:23:45,423 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:45,455 INFO L225 Difference]: With dead ends: 13140 [2021-07-13 20:23:45,455 INFO L226 Difference]: Without dead ends: 12928 [2021-07-13 20:23:45,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 2497.3ms TimeCoverageRelationStatistics Valid=1152, Invalid=6158, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:23:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12928 states. [2021-07-13 20:23:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12928 to 8684. [2021-07-13 20:23:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.397097777265922) internal successors, (29497), 8683 states have internal predecessors, (29497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 29497 transitions. [2021-07-13 20:23:45,633 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 29497 transitions. Word has length 36 [2021-07-13 20:23:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:45,633 INFO L482 AbstractCegarLoop]: Abstraction has 8684 states and 29497 transitions. [2021-07-13 20:23:45,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 29497 transitions. [2021-07-13 20:23:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:45,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:45,647 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:45,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:45,847 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1952010825, now seen corresponding path program 155 times [2021-07-13 20:23:45,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:45,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933528683] [2021-07-13 20:23:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:46,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933528683] [2021-07-13 20:23:46,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933528683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:46,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306560910] [2021-07-13 20:23:46,127 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 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 [2021-07-13 20:23:46,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:23:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:46,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306560910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:46,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:46,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:23:46,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896076939] [2021-07-13 20:23:46,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:23:46,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:23:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:23:46,797 INFO L87 Difference]: Start difference. First operand 8684 states and 29497 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:50,121 INFO L93 Difference]: Finished difference Result 14102 states and 45513 transitions. [2021-07-13 20:23:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:23:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:50,149 INFO L225 Difference]: With dead ends: 14102 [2021-07-13 20:23:50,150 INFO L226 Difference]: Without dead ends: 13902 [2021-07-13 20:23:50,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 2960.4ms TimeCoverageRelationStatistics Valid=1379, Invalid=7551, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:23:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13902 states. [2021-07-13 20:23:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13902 to 8686. [2021-07-13 20:23:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8686 states, 8685 states have (on average 3.397236614853195) internal successors, (29505), 8685 states have internal predecessors, (29505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8686 states to 8686 states and 29505 transitions. [2021-07-13 20:23:50,330 INFO L78 Accepts]: Start accepts. Automaton has 8686 states and 29505 transitions. Word has length 36 [2021-07-13 20:23:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:50,330 INFO L482 AbstractCegarLoop]: Abstraction has 8686 states and 29505 transitions. [2021-07-13 20:23:50,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8686 states and 29505 transitions. [2021-07-13 20:23:50,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:50,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:50,343 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:50,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-07-13 20:23:50,544 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:50,544 INFO L82 PathProgramCache]: Analyzing trace with hash -159009971, now seen corresponding path program 156 times [2021-07-13 20:23:50,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:50,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782217257] [2021-07-13 20:23:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:50,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:50,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782217257] [2021-07-13 20:23:50,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782217257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:50,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872571941] [2021-07-13 20:23:50,800 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 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 [2021-07-13 20:23:50,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:23:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:50,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:51,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872571941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:51,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:51,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:23:51,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032168127] [2021-07-13 20:23:51,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:23:51,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:51,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:23:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:23:51,384 INFO L87 Difference]: Start difference. First operand 8686 states and 29505 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:56,449 INFO L93 Difference]: Finished difference Result 15290 states and 48969 transitions. [2021-07-13 20:23:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:23:56,450 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:56,478 INFO L225 Difference]: With dead ends: 15290 [2021-07-13 20:23:56,479 INFO L226 Difference]: Without dead ends: 15107 [2021-07-13 20:23:56,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 3707.9ms TimeCoverageRelationStatistics Valid=1808, Invalid=9534, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:23:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-07-13 20:23:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 8680. [2021-07-13 20:23:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8679 states have (on average 3.396819910127895) internal successors, (29481), 8679 states have internal predecessors, (29481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 29481 transitions. [2021-07-13 20:23:56,683 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 29481 transitions. Word has length 36 [2021-07-13 20:23:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:56,683 INFO L482 AbstractCegarLoop]: Abstraction has 8680 states and 29481 transitions. [2021-07-13 20:23:56,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 29481 transitions. [2021-07-13 20:23:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:56,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:56,696 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:56,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:56,896 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1409144435, now seen corresponding path program 157 times [2021-07-13 20:23:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:56,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775131352] [2021-07-13 20:23:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:57,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:57,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775131352] [2021-07-13 20:23:57,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775131352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:57,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901639164] [2021-07-13 20:23:57,210 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 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 [2021-07-13 20:23:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:57,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901639164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:57,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:57,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:23:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248209730] [2021-07-13 20:23:57,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:23:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:23:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:23:57,944 INFO L87 Difference]: Start difference. First operand 8680 states and 29481 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:59,228 INFO L93 Difference]: Finished difference Result 9583 states and 31970 transitions. [2021-07-13 20:23:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:23:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:23:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:59,247 INFO L225 Difference]: With dead ends: 9583 [2021-07-13 20:23:59,248 INFO L226 Difference]: Without dead ends: 9502 [2021-07-13 20:23:59,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1444.4ms TimeCoverageRelationStatistics Valid=484, Invalid=2708, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:23:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9502 states. [2021-07-13 20:23:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9502 to 8856. [2021-07-13 20:23:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8856 states, 8855 states have (on average 3.3918690005646526) internal successors, (30035), 8855 states have internal predecessors, (30035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8856 states to 8856 states and 30035 transitions. [2021-07-13 20:23:59,400 INFO L78 Accepts]: Start accepts. Automaton has 8856 states and 30035 transitions. Word has length 36 [2021-07-13 20:23:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:59,400 INFO L482 AbstractCegarLoop]: Abstraction has 8856 states and 30035 transitions. [2021-07-13 20:23:59,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8856 states and 30035 transitions. [2021-07-13 20:23:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:23:59,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:59,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:59,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:59,614 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2047895693, now seen corresponding path program 158 times [2021-07-13 20:23:59,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:59,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838016445] [2021-07-13 20:23:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:59,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:59,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838016445] [2021-07-13 20:23:59,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838016445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:59,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767447766] [2021-07-13 20:23:59,846 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 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 [2021-07-13 20:23:59,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:59,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:23:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:00,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767447766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:00,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:00,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:24:00,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840041599] [2021-07-13 20:24:00,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:24:00,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:00,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:24:00,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:24:00,502 INFO L87 Difference]: Start difference. First operand 8856 states and 30035 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:03,000 INFO L93 Difference]: Finished difference Result 9891 states and 32863 transitions. [2021-07-13 20:24:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:24:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:03,018 INFO L225 Difference]: With dead ends: 9891 [2021-07-13 20:24:03,018 INFO L226 Difference]: Without dead ends: 9654 [2021-07-13 20:24:03,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 2104.9ms TimeCoverageRelationStatistics Valid=749, Invalid=4801, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:24:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-07-13 20:24:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 8788. [2021-07-13 20:24:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 3.398770911573916) internal successors, (29865), 8787 states have internal predecessors, (29865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 29865 transitions. [2021-07-13 20:24:03,177 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 29865 transitions. Word has length 36 [2021-07-13 20:24:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:03,177 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 29865 transitions. [2021-07-13 20:24:03,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 29865 transitions. [2021-07-13 20:24:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:03,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:03,190 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:03,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:03,390 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1369833873, now seen corresponding path program 159 times [2021-07-13 20:24:03,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:03,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519478551] [2021-07-13 20:24:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:03,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:03,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519478551] [2021-07-13 20:24:03,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519478551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:03,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423453405] [2021-07-13 20:24:03,714 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 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 [2021-07-13 20:24:03,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:24:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:24:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423453405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:04,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:04,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:24:04,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808513616] [2021-07-13 20:24:04,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:24:04,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:04,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:24:04,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:24:04,322 INFO L87 Difference]: Start difference. First operand 8788 states and 29865 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:07,303 INFO L93 Difference]: Finished difference Result 12238 states and 40261 transitions. [2021-07-13 20:24:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:24:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:07,328 INFO L225 Difference]: With dead ends: 12238 [2021-07-13 20:24:07,328 INFO L226 Difference]: Without dead ends: 12124 [2021-07-13 20:24:07,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 2569.5ms TimeCoverageRelationStatistics Valid=1030, Invalid=5290, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:24:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12124 states. [2021-07-13 20:24:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12124 to 8752. [2021-07-13 20:24:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 3.396297565992458) internal successors, (29721), 8751 states have internal predecessors, (29721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 29721 transitions. [2021-07-13 20:24:07,518 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 29721 transitions. Word has length 36 [2021-07-13 20:24:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:07,518 INFO L482 AbstractCegarLoop]: Abstraction has 8752 states and 29721 transitions. [2021-07-13 20:24:07,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 29721 transitions. [2021-07-13 20:24:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:07,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:07,532 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:07,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-07-13 20:24:07,732 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1027220015, now seen corresponding path program 160 times [2021-07-13 20:24:07,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:07,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094071337] [2021-07-13 20:24:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:08,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094071337] [2021-07-13 20:24:08,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094071337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605738020] [2021-07-13 20:24:08,100 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 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 [2021-07-13 20:24:08,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:24:08,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:08,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:24:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:08,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605738020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:08,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:08,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:24:08,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471593888] [2021-07-13 20:24:08,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:24:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:24:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:24:08,761 INFO L87 Difference]: Start difference. First operand 8752 states and 29721 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:11,549 INFO L93 Difference]: Finished difference Result 14609 states and 48154 transitions. [2021-07-13 20:24:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:24:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:11,580 INFO L225 Difference]: With dead ends: 14609 [2021-07-13 20:24:11,581 INFO L226 Difference]: Without dead ends: 14489 [2021-07-13 20:24:11,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2615.1ms TimeCoverageRelationStatistics Valid=1026, Invalid=5136, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:24:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14489 states. [2021-07-13 20:24:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14489 to 8780. [2021-07-13 20:24:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8780 states, 8779 states have (on average 3.397311766716027) internal successors, (29825), 8779 states have internal predecessors, (29825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8780 states to 8780 states and 29825 transitions. [2021-07-13 20:24:11,773 INFO L78 Accepts]: Start accepts. Automaton has 8780 states and 29825 transitions. Word has length 36 [2021-07-13 20:24:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:11,773 INFO L482 AbstractCegarLoop]: Abstraction has 8780 states and 29825 transitions. [2021-07-13 20:24:11,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8780 states and 29825 transitions. [2021-07-13 20:24:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:11,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:11,787 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:11,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:11,987 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1396473697, now seen corresponding path program 161 times [2021-07-13 20:24:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:11,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785807485] [2021-07-13 20:24:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:12,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:12,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785807485] [2021-07-13 20:24:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785807485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:12,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498974724] [2021-07-13 20:24:12,292 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 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 [2021-07-13 20:24:12,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:24:12,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:12,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498974724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:12,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:12,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:24:12,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771367402] [2021-07-13 20:24:12,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:24:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:12,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:24:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:24:12,887 INFO L87 Difference]: Start difference. First operand 8780 states and 29825 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:15,957 INFO L93 Difference]: Finished difference Result 12866 states and 42121 transitions. [2021-07-13 20:24:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:24:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:15,986 INFO L225 Difference]: With dead ends: 12866 [2021-07-13 20:24:15,986 INFO L226 Difference]: Without dead ends: 12777 [2021-07-13 20:24:15,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 2684.5ms TimeCoverageRelationStatistics Valid=1070, Invalid=5572, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:24:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12777 states. [2021-07-13 20:24:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12777 to 9042. [2021-07-13 20:24:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9042 states, 9041 states have (on average 3.3877889613980754) internal successors, (30629), 9041 states have internal predecessors, (30629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9042 states to 9042 states and 30629 transitions. [2021-07-13 20:24:16,197 INFO L78 Accepts]: Start accepts. Automaton has 9042 states and 30629 transitions. Word has length 36 [2021-07-13 20:24:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:16,197 INFO L482 AbstractCegarLoop]: Abstraction has 9042 states and 30629 transitions. [2021-07-13 20:24:16,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 9042 states and 30629 transitions. [2021-07-13 20:24:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:16,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:16,210 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:16,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:16,411 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1892255333, now seen corresponding path program 162 times [2021-07-13 20:24:16,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:16,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572200776] [2021-07-13 20:24:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:16,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572200776] [2021-07-13 20:24:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572200776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:16,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022255914] [2021-07-13 20:24:16,645 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 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 [2021-07-13 20:24:16,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:24:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:24:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022255914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:17,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:17,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:24:17,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565070843] [2021-07-13 20:24:17,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:24:17,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:24:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:24:17,193 INFO L87 Difference]: Start difference. First operand 9042 states and 30629 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:21,197 INFO L93 Difference]: Finished difference Result 13321 states and 43228 transitions. [2021-07-13 20:24:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:24:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:21,225 INFO L225 Difference]: With dead ends: 13321 [2021-07-13 20:24:21,225 INFO L226 Difference]: Without dead ends: 13070 [2021-07-13 20:24:21,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 2841.3ms TimeCoverageRelationStatistics Valid=993, Invalid=7197, Unknown=0, NotChecked=0, Total=8190 [2021-07-13 20:24:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13070 states. [2021-07-13 20:24:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13070 to 9042. [2021-07-13 20:24:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9042 states, 9041 states have (on average 3.3877889613980754) internal successors, (30629), 9041 states have internal predecessors, (30629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9042 states to 9042 states and 30629 transitions. [2021-07-13 20:24:21,445 INFO L78 Accepts]: Start accepts. Automaton has 9042 states and 30629 transitions. Word has length 36 [2021-07-13 20:24:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:21,445 INFO L482 AbstractCegarLoop]: Abstraction has 9042 states and 30629 transitions. [2021-07-13 20:24:21,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9042 states and 30629 transitions. [2021-07-13 20:24:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:21,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:21,459 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:21,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-07-13 20:24:21,659 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1703787873, now seen corresponding path program 163 times [2021-07-13 20:24:21,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:21,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422386716] [2021-07-13 20:24:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:24:21,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422386716] [2021-07-13 20:24:21,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422386716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376584702] [2021-07-13 20:24:21,897 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 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 [2021-07-13 20:24:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:21,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:22,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376584702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:22,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:22,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:24:22,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514266880] [2021-07-13 20:24:22,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:24:22,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:22,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:24:22,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:24:22,488 INFO L87 Difference]: Start difference. First operand 9042 states and 30629 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:26,484 INFO L93 Difference]: Finished difference Result 15478 states and 49659 transitions. [2021-07-13 20:24:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:24:26,484 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:26,516 INFO L225 Difference]: With dead ends: 15478 [2021-07-13 20:24:26,516 INFO L226 Difference]: Without dead ends: 15306 [2021-07-13 20:24:26,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 3115.4ms TimeCoverageRelationStatistics Valid=1428, Invalid=7128, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:24:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15306 states. [2021-07-13 20:24:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15306 to 9042. [2021-07-13 20:24:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9042 states, 9041 states have (on average 3.3877889613980754) internal successors, (30629), 9041 states have internal predecessors, (30629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9042 states to 9042 states and 30629 transitions. [2021-07-13 20:24:26,759 INFO L78 Accepts]: Start accepts. Automaton has 9042 states and 30629 transitions. Word has length 36 [2021-07-13 20:24:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:26,759 INFO L482 AbstractCegarLoop]: Abstraction has 9042 states and 30629 transitions. [2021-07-13 20:24:26,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9042 states and 30629 transitions. [2021-07-13 20:24:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:26,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:26,772 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:26,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-07-13 20:24:26,973 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -510310387, now seen corresponding path program 164 times [2021-07-13 20:24:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403037998] [2021-07-13 20:24:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:27,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:27,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403037998] [2021-07-13 20:24:27,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403037998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:27,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642870305] [2021-07-13 20:24:27,302 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 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 [2021-07-13 20:24:27,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:24:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:24:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:27,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642870305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:27,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:27,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-07-13 20:24:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132669425] [2021-07-13 20:24:27,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:24:27,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:24:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:24:27,901 INFO L87 Difference]: Start difference. First operand 9042 states and 30629 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:30,806 INFO L93 Difference]: Finished difference Result 13247 states and 43430 transitions. [2021-07-13 20:24:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:24:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:30,836 INFO L225 Difference]: With dead ends: 13247 [2021-07-13 20:24:30,836 INFO L226 Difference]: Without dead ends: 13127 [2021-07-13 20:24:30,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2365.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=4688, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:24:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-07-13 20:24:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 9102. [2021-07-13 20:24:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9102 states, 9101 states have (on average 3.3916053180969126) internal successors, (30867), 9101 states have internal predecessors, (30867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9102 states to 9102 states and 30867 transitions. [2021-07-13 20:24:31,021 INFO L78 Accepts]: Start accepts. Automaton has 9102 states and 30867 transitions. Word has length 36 [2021-07-13 20:24:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:31,021 INFO L482 AbstractCegarLoop]: Abstraction has 9102 states and 30867 transitions. [2021-07-13 20:24:31,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9102 states and 30867 transitions. [2021-07-13 20:24:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:31,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:31,035 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:31,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-07-13 20:24:31,235 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:31,235 INFO L82 PathProgramCache]: Analyzing trace with hash -14528751, now seen corresponding path program 165 times [2021-07-13 20:24:31,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:31,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133058127] [2021-07-13 20:24:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:31,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:31,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133058127] [2021-07-13 20:24:31,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133058127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:31,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943576355] [2021-07-13 20:24:31,478 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 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 [2021-07-13 20:24:31,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:24:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:24:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:32,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943576355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:32,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:32,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:24:32,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110485184] [2021-07-13 20:24:32,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:24:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:24:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:24:32,079 INFO L87 Difference]: Start difference. First operand 9102 states and 30867 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:36,207 INFO L93 Difference]: Finished difference Result 13635 states and 44262 transitions. [2021-07-13 20:24:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:24:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:36,234 INFO L225 Difference]: With dead ends: 13635 [2021-07-13 20:24:36,234 INFO L226 Difference]: Without dead ends: 13384 [2021-07-13 20:24:36,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 3081.8ms TimeCoverageRelationStatistics Valid=1148, Invalid=8358, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:24:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2021-07-13 20:24:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 9102. [2021-07-13 20:24:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9102 states, 9101 states have (on average 3.391385562026151) internal successors, (30865), 9101 states have internal predecessors, (30865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9102 states to 9102 states and 30865 transitions. [2021-07-13 20:24:36,417 INFO L78 Accepts]: Start accepts. Automaton has 9102 states and 30865 transitions. Word has length 36 [2021-07-13 20:24:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:36,417 INFO L482 AbstractCegarLoop]: Abstraction has 9102 states and 30865 transitions. [2021-07-13 20:24:36,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9102 states and 30865 transitions. [2021-07-13 20:24:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:36,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:36,431 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:36,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1115 [2021-07-13 20:24:36,631 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash 986322445, now seen corresponding path program 166 times [2021-07-13 20:24:36,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:36,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219443912] [2021-07-13 20:24:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:36,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:36,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219443912] [2021-07-13 20:24:36,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219443912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:36,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060006986] [2021-07-13 20:24:36,899 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 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 [2021-07-13 20:24:36,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:24:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:37,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060006986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:37,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:37,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-07-13 20:24:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85757247] [2021-07-13 20:24:37,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:24:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:24:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:24:37,576 INFO L87 Difference]: Start difference. First operand 9102 states and 30865 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:40,713 INFO L93 Difference]: Finished difference Result 14307 states and 46209 transitions. [2021-07-13 20:24:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:24:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:40,741 INFO L225 Difference]: With dead ends: 14307 [2021-07-13 20:24:40,741 INFO L226 Difference]: Without dead ends: 14107 [2021-07-13 20:24:40,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 2649.7ms TimeCoverageRelationStatistics Valid=1183, Invalid=7007, Unknown=0, NotChecked=0, Total=8190 [2021-07-13 20:24:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14107 states. [2021-07-13 20:24:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14107 to 9104. [2021-07-13 20:24:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 3.3915192793584534) internal successors, (30873), 9103 states have internal predecessors, (30873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 30873 transitions. [2021-07-13 20:24:40,935 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 30873 transitions. Word has length 36 [2021-07-13 20:24:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 9104 states and 30873 transitions. [2021-07-13 20:24:40,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 30873 transitions. [2021-07-13 20:24:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:40,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:40,949 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:41,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:41,149 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1124698351, now seen corresponding path program 167 times [2021-07-13 20:24:41,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:41,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872683560] [2021-07-13 20:24:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:41,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:41,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872683560] [2021-07-13 20:24:41,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872683560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:41,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648454424] [2021-07-13 20:24:41,405 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 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 [2021-07-13 20:24:41,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:24:41,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:41,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:41,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:42,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648454424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:42,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:42,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 20:24:42,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164677604] [2021-07-13 20:24:42,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:24:42,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:24:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:24:42,373 INFO L87 Difference]: Start difference. First operand 9104 states and 30873 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:47,422 INFO L93 Difference]: Finished difference Result 16161 states and 51683 transitions. [2021-07-13 20:24:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:24:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:47,455 INFO L225 Difference]: With dead ends: 16161 [2021-07-13 20:24:47,455 INFO L226 Difference]: Without dead ends: 16036 [2021-07-13 20:24:47,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3873 ImplicationChecksByTransitivity, 4257.5ms TimeCoverageRelationStatistics Valid=1762, Invalid=10228, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:24:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16036 states. [2021-07-13 20:24:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16036 to 9440. [2021-07-13 20:24:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9440 states, 9439 states have (on average 3.3843627502913445) internal successors, (31945), 9439 states have internal predecessors, (31945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9440 states to 9440 states and 31945 transitions. [2021-07-13 20:24:47,709 INFO L78 Accepts]: Start accepts. Automaton has 9440 states and 31945 transitions. Word has length 36 [2021-07-13 20:24:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:47,709 INFO L482 AbstractCegarLoop]: Abstraction has 9440 states and 31945 transitions. [2021-07-13 20:24:47,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9440 states and 31945 transitions. [2021-07-13 20:24:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:47,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:47,723 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:47,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-13 20:24:47,923 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash -202996211, now seen corresponding path program 168 times [2021-07-13 20:24:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:47,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239922312] [2021-07-13 20:24:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:24:48,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:48,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239922312] [2021-07-13 20:24:48,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239922312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:48,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399464052] [2021-07-13 20:24:48,180 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 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 [2021-07-13 20:24:48,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:24:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:48,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:48,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399464052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:48,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:48,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:24:48,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838860547] [2021-07-13 20:24:48,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:24:48,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:24:48,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:24:48,748 INFO L87 Difference]: Start difference. First operand 9440 states and 31945 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:52,944 INFO L93 Difference]: Finished difference Result 16189 states and 51937 transitions. [2021-07-13 20:24:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-13 20:24:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:52,979 INFO L225 Difference]: With dead ends: 16189 [2021-07-13 20:24:52,979 INFO L226 Difference]: Without dead ends: 16017 [2021-07-13 20:24:52,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 3260.3ms TimeCoverageRelationStatistics Valid=1724, Invalid=8376, Unknown=0, NotChecked=0, Total=10100 [2021-07-13 20:24:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16017 states. [2021-07-13 20:24:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16017 to 9417. [2021-07-13 20:24:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 3.3826465590484283) internal successors, (31851), 9416 states have internal predecessors, (31851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 31851 transitions. [2021-07-13 20:24:53,230 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 31851 transitions. Word has length 36 [2021-07-13 20:24:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:53,230 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 31851 transitions. [2021-07-13 20:24:53,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 31851 transitions. [2021-07-13 20:24:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:53,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:53,244 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:53,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:53,445 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1325847633, now seen corresponding path program 169 times [2021-07-13 20:24:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:53,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864772659] [2021-07-13 20:24:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864772659] [2021-07-13 20:24:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864772659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617583917] [2021-07-13 20:24:53,771 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 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 [2021-07-13 20:24:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:24:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:54,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617583917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:54,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:54,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:24:54,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671991467] [2021-07-13 20:24:54,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:24:54,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:24:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:24:54,434 INFO L87 Difference]: Start difference. First operand 9417 states and 31851 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:57,293 INFO L93 Difference]: Finished difference Result 13646 states and 44764 transitions. [2021-07-13 20:24:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:24:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:24:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:57,322 INFO L225 Difference]: With dead ends: 13646 [2021-07-13 20:24:57,322 INFO L226 Difference]: Without dead ends: 13526 [2021-07-13 20:24:57,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 2516.3ms TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:24:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13526 states. [2021-07-13 20:24:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13526 to 9427. [2021-07-13 20:24:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9427 states, 9426 states have (on average 3.3824527901548906) internal successors, (31883), 9426 states have internal predecessors, (31883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9427 states to 9427 states and 31883 transitions. [2021-07-13 20:24:57,519 INFO L78 Accepts]: Start accepts. Automaton has 9427 states and 31883 transitions. Word has length 36 [2021-07-13 20:24:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:57,519 INFO L482 AbstractCegarLoop]: Abstraction has 9427 states and 31883 transitions. [2021-07-13 20:24:57,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9427 states and 31883 transitions. [2021-07-13 20:24:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:24:57,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:57,533 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:57,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-07-13 20:24:57,734 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1821629269, now seen corresponding path program 170 times [2021-07-13 20:24:57,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:57,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843849763] [2021-07-13 20:24:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:57,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:57,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843849763] [2021-07-13 20:24:57,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843849763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:57,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046727227] [2021-07-13 20:24:57,975 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 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 [2021-07-13 20:24:57,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:24:57,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:57,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:24:57,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:58,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046727227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:58,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:58,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-07-13 20:24:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721223010] [2021-07-13 20:24:58,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:24:58,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:24:58,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:24:58,577 INFO L87 Difference]: Start difference. First operand 9427 states and 31883 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:02,474 INFO L93 Difference]: Finished difference Result 13892 states and 45104 transitions. [2021-07-13 20:25:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:25:02,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:02,503 INFO L225 Difference]: With dead ends: 13892 [2021-07-13 20:25:02,503 INFO L226 Difference]: Without dead ends: 13641 [2021-07-13 20:25:02,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 3142.2ms TimeCoverageRelationStatistics Valid=1142, Invalid=8560, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:25:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13641 states. [2021-07-13 20:25:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13641 to 9387. [2021-07-13 20:25:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9386 states have (on average 3.3789686767526104) internal successors, (31715), 9386 states have internal predecessors, (31715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 31715 transitions. [2021-07-13 20:25:02,704 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 31715 transitions. Word has length 36 [2021-07-13 20:25:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:02,704 INFO L482 AbstractCegarLoop]: Abstraction has 9387 states and 31715 transitions. [2021-07-13 20:25:02,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 31715 transitions. [2021-07-13 20:25:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:02,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:02,718 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:02,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:02,919 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2119463059, now seen corresponding path program 171 times [2021-07-13 20:25:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:02,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898164464] [2021-07-13 20:25:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:03,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:03,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898164464] [2021-07-13 20:25:03,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898164464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:03,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317815981] [2021-07-13 20:25:03,224 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 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 [2021-07-13 20:25:03,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:25:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:25:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:03,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317815981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:03,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:03,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:25:03,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586096987] [2021-07-13 20:25:03,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:25:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:25:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:25:03,898 INFO L87 Difference]: Start difference. First operand 9387 states and 31715 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:05,508 INFO L93 Difference]: Finished difference Result 11319 states and 37527 transitions. [2021-07-13 20:25:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:25:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:05,534 INFO L225 Difference]: With dead ends: 11319 [2021-07-13 20:25:05,534 INFO L226 Difference]: Without dead ends: 11205 [2021-07-13 20:25:05,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1482.9ms TimeCoverageRelationStatistics Valid=467, Invalid=2395, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:25:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-07-13 20:25:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 9417. [2021-07-13 20:25:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 3.3786108751062023) internal successors, (31813), 9416 states have internal predecessors, (31813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 31813 transitions. [2021-07-13 20:25:05,769 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 31813 transitions. Word has length 36 [2021-07-13 20:25:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:05,770 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 31813 transitions. [2021-07-13 20:25:05,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 31813 transitions. [2021-07-13 20:25:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:05,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:05,784 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:05,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1145 [2021-07-13 20:25:05,985 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1267870955, now seen corresponding path program 172 times [2021-07-13 20:25:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858251965] [2021-07-13 20:25:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:06,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:06,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858251965] [2021-07-13 20:25:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858251965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:06,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949372832] [2021-07-13 20:25:06,256 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 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 [2021-07-13 20:25:06,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:06,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:06,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:25:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949372832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:06,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:06,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:25:06,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703933345] [2021-07-13 20:25:06,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:25:06,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:06,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:25:06,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:25:06,890 INFO L87 Difference]: Start difference. First operand 9417 states and 31813 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:08,267 INFO L93 Difference]: Finished difference Result 11692 states and 39268 transitions. [2021-07-13 20:25:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:25:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:08,343 INFO L225 Difference]: With dead ends: 11692 [2021-07-13 20:25:08,343 INFO L226 Difference]: Without dead ends: 11572 [2021-07-13 20:25:08,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1389.0ms TimeCoverageRelationStatistics Valid=515, Invalid=2455, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:25:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-07-13 20:25:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 9417. [2021-07-13 20:25:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 9416 states have (on average 3.3786108751062023) internal successors, (31813), 9416 states have internal predecessors, (31813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 31813 transitions. [2021-07-13 20:25:08,511 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 31813 transitions. Word has length 36 [2021-07-13 20:25:08,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:08,511 INFO L482 AbstractCegarLoop]: Abstraction has 9417 states and 31813 transitions. [2021-07-13 20:25:08,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 31813 transitions. [2021-07-13 20:25:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:08,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:08,526 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:08,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1155,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:08,727 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1454175017, now seen corresponding path program 173 times [2021-07-13 20:25:08,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:08,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405821220] [2021-07-13 20:25:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:08,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:08,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405821220] [2021-07-13 20:25:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405821220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:08,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924342622] [2021-07-13 20:25:08,955 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 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 [2021-07-13 20:25:08,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:25:08,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924342622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:09,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:09,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:25:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61610298] [2021-07-13 20:25:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:25:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:25:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:25:09,525 INFO L87 Difference]: Start difference. First operand 9417 states and 31813 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:11,568 INFO L93 Difference]: Finished difference Result 11087 states and 36501 transitions. [2021-07-13 20:25:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:25:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:11,590 INFO L225 Difference]: With dead ends: 11087 [2021-07-13 20:25:11,591 INFO L226 Difference]: Without dead ends: 10827 [2021-07-13 20:25:11,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1717.8ms TimeCoverageRelationStatistics Valid=694, Invalid=3862, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:25:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10827 states. [2021-07-13 20:25:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10827 to 9469. [2021-07-13 20:25:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9469 states, 9468 states have (on average 3.37716518800169) internal successors, (31975), 9468 states have internal predecessors, (31975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9469 states to 9469 states and 31975 transitions. [2021-07-13 20:25:11,766 INFO L78 Accepts]: Start accepts. Automaton has 9469 states and 31975 transitions. Word has length 36 [2021-07-13 20:25:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:11,766 INFO L482 AbstractCegarLoop]: Abstraction has 9469 states and 31975 transitions. [2021-07-13 20:25:11,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9469 states and 31975 transitions. [2021-07-13 20:25:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:11,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:11,780 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-07-13 20:25:11,981 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1848298715, now seen corresponding path program 174 times [2021-07-13 20:25:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:11,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767364524] [2021-07-13 20:25:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:12,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:12,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767364524] [2021-07-13 20:25:12,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767364524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:12,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799261492] [2021-07-13 20:25:12,204 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 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 [2021-07-13 20:25:12,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:25:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:25:12,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:12,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799261492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:12,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:12,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:25:12,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889977066] [2021-07-13 20:25:12,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:25:12,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:25:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:25:12,736 INFO L87 Difference]: Start difference. First operand 9469 states and 31975 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:15,290 INFO L93 Difference]: Finished difference Result 12145 states and 39833 transitions. [2021-07-13 20:25:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:25:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:15,316 INFO L225 Difference]: With dead ends: 12145 [2021-07-13 20:25:15,317 INFO L226 Difference]: Without dead ends: 11871 [2021-07-13 20:25:15,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 2076.1ms TimeCoverageRelationStatistics Valid=871, Invalid=4829, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:25:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11871 states. [2021-07-13 20:25:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11871 to 9494. [2021-07-13 20:25:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9494 states, 9493 states have (on average 3.3784894132518697) internal successors, (32072), 9493 states have internal predecessors, (32072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9494 states to 9494 states and 32072 transitions. [2021-07-13 20:25:15,526 INFO L78 Accepts]: Start accepts. Automaton has 9494 states and 32072 transitions. Word has length 36 [2021-07-13 20:25:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:15,526 INFO L482 AbstractCegarLoop]: Abstraction has 9494 states and 32072 transitions. [2021-07-13 20:25:15,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 9494 states and 32072 transitions. [2021-07-13 20:25:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:15,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:15,541 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:15,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1169,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:15,741 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash -504566575, now seen corresponding path program 175 times [2021-07-13 20:25:15,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:15,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480182182] [2021-07-13 20:25:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:16,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:16,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480182182] [2021-07-13 20:25:16,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480182182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:16,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233602993] [2021-07-13 20:25:16,032 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 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 [2021-07-13 20:25:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:25:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:16,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233602993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:16,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:16,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:25:16,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989933198] [2021-07-13 20:25:16,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:25:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:25:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:25:16,595 INFO L87 Difference]: Start difference. First operand 9494 states and 32072 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:18,439 INFO L93 Difference]: Finished difference Result 11806 states and 38817 transitions. [2021-07-13 20:25:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:25:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:18,515 INFO L225 Difference]: With dead ends: 11806 [2021-07-13 20:25:18,515 INFO L226 Difference]: Without dead ends: 11576 [2021-07-13 20:25:18,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1747.6ms TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:25:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11576 states. [2021-07-13 20:25:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11576 to 9523. [2021-07-13 20:25:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9523 states, 9522 states have (on average 3.3776517538332285) internal successors, (32162), 9522 states have internal predecessors, (32162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9523 states to 9523 states and 32162 transitions. [2021-07-13 20:25:18,693 INFO L78 Accepts]: Start accepts. Automaton has 9523 states and 32162 transitions. Word has length 36 [2021-07-13 20:25:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:18,693 INFO L482 AbstractCegarLoop]: Abstraction has 9523 states and 32162 transitions. [2021-07-13 20:25:18,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 9523 states and 32162 transitions. [2021-07-13 20:25:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:18,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:18,708 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:18,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:18,908 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash 213001425, now seen corresponding path program 176 times [2021-07-13 20:25:18,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:18,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85056212] [2021-07-13 20:25:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:19,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:19,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85056212] [2021-07-13 20:25:19,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85056212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:19,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313185084] [2021-07-13 20:25:19,141 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 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 [2021-07-13 20:25:19,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:19,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:19,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:25:19,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:19,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313185084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:19,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:19,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-07-13 20:25:19,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838613258] [2021-07-13 20:25:19,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:25:19,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:25:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:25:19,669 INFO L87 Difference]: Start difference. First operand 9523 states and 32162 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:21,979 INFO L93 Difference]: Finished difference Result 14710 states and 47784 transitions. [2021-07-13 20:25:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:25:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:22,011 INFO L225 Difference]: With dead ends: 14710 [2021-07-13 20:25:22,011 INFO L226 Difference]: Without dead ends: 14502 [2021-07-13 20:25:22,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2009.3ms TimeCoverageRelationStatistics Valid=1022, Invalid=4528, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:25:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2021-07-13 20:25:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 9512. [2021-07-13 20:25:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.37682683208916) internal successors, (32117), 9511 states have internal predecessors, (32117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 32117 transitions. [2021-07-13 20:25:22,239 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 32117 transitions. Word has length 36 [2021-07-13 20:25:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:22,239 INFO L482 AbstractCegarLoop]: Abstraction has 9512 states and 32117 transitions. [2021-07-13 20:25:22,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 32117 transitions. [2021-07-13 20:25:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:22,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:22,254 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:22,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-07-13 20:25:22,455 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1182658195, now seen corresponding path program 177 times [2021-07-13 20:25:22,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:22,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430513853] [2021-07-13 20:25:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:22,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430513853] [2021-07-13 20:25:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430513853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:22,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378556176] [2021-07-13 20:25:22,708 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 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 [2021-07-13 20:25:22,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:25:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:25:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:23,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378556176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:23,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:23,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:25:23,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787787531] [2021-07-13 20:25:23,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:25:23,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:23,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:25:23,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:25:23,211 INFO L87 Difference]: Start difference. First operand 9512 states and 32117 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:24,913 INFO L93 Difference]: Finished difference Result 11067 states and 36686 transitions. [2021-07-13 20:25:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:25:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:24,936 INFO L225 Difference]: With dead ends: 11067 [2021-07-13 20:25:24,936 INFO L226 Difference]: Without dead ends: 10874 [2021-07-13 20:25:24,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1428.6ms TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:25:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10874 states. [2021-07-13 20:25:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10874 to 9516. [2021-07-13 20:25:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.3775091960063057) internal successors, (32137), 9515 states have internal predecessors, (32137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 32137 transitions. [2021-07-13 20:25:25,137 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 32137 transitions. Word has length 36 [2021-07-13 20:25:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:25,137 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 32137 transitions. [2021-07-13 20:25:25,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 32137 transitions. [2021-07-13 20:25:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:25,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:25,152 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:25,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:25,353 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1793353245, now seen corresponding path program 178 times [2021-07-13 20:25:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:25,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113938397] [2021-07-13 20:25:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:25,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:25,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113938397] [2021-07-13 20:25:25,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113938397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:25,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134396561] [2021-07-13 20:25:25,583 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 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 [2021-07-13 20:25:25,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:25,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134396561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:26,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:26,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:25:26,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4692696] [2021-07-13 20:25:26,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:25:26,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:25:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:25:26,264 INFO L87 Difference]: Start difference. First operand 9516 states and 32137 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:29,868 INFO L93 Difference]: Finished difference Result 14679 states and 47471 transitions. [2021-07-13 20:25:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:25:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:29,899 INFO L225 Difference]: With dead ends: 14679 [2021-07-13 20:25:29,899 INFO L226 Difference]: Without dead ends: 14469 [2021-07-13 20:25:29,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 2716.1ms TimeCoverageRelationStatistics Valid=1199, Invalid=7357, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:25:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14469 states. [2021-07-13 20:25:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14469 to 9598. [2021-07-13 20:25:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 9597 states have (on average 3.3828279670730437) internal successors, (32465), 9597 states have internal predecessors, (32465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 32465 transitions. [2021-07-13 20:25:30,115 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 32465 transitions. Word has length 36 [2021-07-13 20:25:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:30,115 INFO L482 AbstractCegarLoop]: Abstraction has 9598 states and 32465 transitions. [2021-07-13 20:25:30,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 32465 transitions. [2021-07-13 20:25:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:30,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:30,130 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:30,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:30,331 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:30,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1784046051, now seen corresponding path program 179 times [2021-07-13 20:25:30,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:30,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652877717] [2021-07-13 20:25:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:30,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652877717] [2021-07-13 20:25:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652877717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641856852] [2021-07-13 20:25:30,570 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 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 [2021-07-13 20:25:30,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:30,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:31,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641856852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:31,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:31,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:25:31,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67424572] [2021-07-13 20:25:31,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:25:31,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:25:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:25:31,216 INFO L87 Difference]: Start difference. First operand 9598 states and 32465 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:35,380 INFO L93 Difference]: Finished difference Result 16861 states and 54131 transitions. [2021-07-13 20:25:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-13 20:25:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:35,415 INFO L225 Difference]: With dead ends: 16861 [2021-07-13 20:25:35,415 INFO L226 Difference]: Without dead ends: 16671 [2021-07-13 20:25:35,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 3181.9ms TimeCoverageRelationStatistics Valid=1501, Invalid=7811, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:25:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16671 states. [2021-07-13 20:25:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16671 to 9500. [2021-07-13 20:25:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9500 states, 9499 states have (on average 3.3764606800715864) internal successors, (32073), 9499 states have internal predecessors, (32073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9500 states to 9500 states and 32073 transitions. [2021-07-13 20:25:35,673 INFO L78 Accepts]: Start accepts. Automaton has 9500 states and 32073 transitions. Word has length 36 [2021-07-13 20:25:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:35,673 INFO L482 AbstractCegarLoop]: Abstraction has 9500 states and 32073 transitions. [2021-07-13 20:25:35,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9500 states and 32073 transitions. [2021-07-13 20:25:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:35,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:35,688 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:35,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1190,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:35,889 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -665456031, now seen corresponding path program 180 times [2021-07-13 20:25:35,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:35,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484620542] [2021-07-13 20:25:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:36,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484620542] [2021-07-13 20:25:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484620542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406676696] [2021-07-13 20:25:36,136 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 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 [2021-07-13 20:25:36,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:25:36,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-13 20:25:36,508 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-07-13 20:25:36,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:36,709 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:25:36,711 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:25:36,712 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:25:36,712 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:25:36 BasicIcfg [2021-07-13 20:25:36,712 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:25:36,712 INFO L168 Benchmark]: Toolchain (without parser) took 732997.02 ms. Allocated memory was 201.3 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 181.5 MB in the beginning and 1.1 GB in the end (delta: -950.6 MB). Peak memory consumption was 109.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:36,712 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory is still 182.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:25:36,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.28 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 180.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:25:36,713 INFO L168 Benchmark]: Boogie Preprocessor took 22.37 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 179.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:36,713 INFO L168 Benchmark]: RCFGBuilder took 317.66 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 164.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:36,713 INFO L168 Benchmark]: TraceAbstraction took 732625.29 ms. Allocated memory was 201.3 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 163.9 MB in the beginning and 1.1 GB in the end (delta: -968.2 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. [2021-07-13 20:25:36,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory is still 182.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.28 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 180.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.37 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 179.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 317.66 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 164.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 732625.29 ms. Allocated memory was 201.3 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 163.9 MB in the beginning and 1.1 GB in the end (delta: -968.2 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 21 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 732509.0ms, OverallIterations: 183, TraceHistogramMax: 4, EmptinessCheckTime: 2003.9ms, AutomataDifference: 505139.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6553 SDtfs, 65623 SDslu, 94277 SDs, 0 SdLazy, 383765 SolverSat, 32624 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 150948.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16800 GetRequests, 3319 SyntacticMatches, 353 SemanticMatches, 13128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329508 ImplicationChecksByTransitivity, 431215.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9598occurred in iteration=181, InterpolantAutomatonStates: 11772, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27303.6ms AutomataMinimizationTime, 182 MinimizatonAttempts, 652478 StatesRemovedByMinimization, 180 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 580.2ms SsaConstructionTime, 1764.5ms SatisfiabilityAnalysisTime, 154925.5ms InterpolantComputationTime, 12698 NumberOfCodeBlocks, 12682 NumberOfCodeBlocksAsserted, 753 NumberOfCheckSat, 12338 ConstructedInterpolants, 0 QuantifiedInterpolants, 292964 SizeOfPredicates, 1212 NumberOfNonLiveVariables, 11426 ConjunctsInSsa, 3855 ConjunctsInUnsatCore, 360 InterpolantComputations, 4 PerfectInterpolantSequences, 113/6774 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown