/usr/bin/java -Xmx16000000000 -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-dev-29289db [2021-06-05 05:53:55,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:53:55,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:53:55,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:53:55,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:53:55,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:53:55,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:53:55,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:53:55,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:53:55,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:53:55,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:53:55,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:53:55,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:53:55,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:53:55,285 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:53:55,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:53:55,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:53:55,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:53:55,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:53:55,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:53:55,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:53:55,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:53:55,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:53:55,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:53:55,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:53:55,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:53:55,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:53:55,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:53:55,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:53:55,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:53:55,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:53:55,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:53:55,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:53:55,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:53:55,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:53:55,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:53:55,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:53:55,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:53:55,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:53:55,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:53:55,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:53:55,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:53:55,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:53:55,656 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:53:55,661 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:53:55,661 INFO L432 ainManager$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 [2021-06-05 05:53:55,662 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-06-05 05:53:55,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:53:55,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:53:55,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:53:55,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:53:55,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:53:55,717 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,725 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:53:55,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:53:55,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:53:55,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:53:55,742 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,742 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,744 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,744 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,747 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,752 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,753 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 05.06 05:53:55" (1/1) ... [2021-06-05 05:53:55,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:53:55,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:53:55,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:53:55,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:53:55,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:53:55,880 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:53:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:53:55,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:53:55,881 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:53:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:53:55,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:53:55,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:53:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:53:55,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:53:55,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:53:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:53:55,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:53:55,884 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:53:56,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:53:56,168 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:53:56,170 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:53:56 BoogieIcfgContainer [2021-06-05 05:53:56,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:53:56,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:53:56,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:53:56,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:53:56,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:55" (1/2) ... [2021-06-05 05:53:56,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40129276 and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:53:56, skipping insertion in model container [2021-06-05 05:53:56,175 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 05.06 05:53:56" (2/2) ... [2021-06-05 05:53:56,176 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-06-05 05:53:56,181 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:53:56,181 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:53:56,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:53:56,182 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:53:56,251 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 05:53:56,286 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 05:53:56,314 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:53:56,314 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:53:56,315 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:53:56,315 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:53:56,315 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:53:56,315 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:53:56,315 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:53:56,315 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:53:56,325 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 05:53:56,356 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:53:56,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:56,375 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-06-05 05:53:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:56,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326318045] [2021-06-05 05:53:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:56,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326318045] [2021-06-05 05:53:56,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326318045] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:53:56,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:53:56,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:53:56,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844735006] [2021-06-05 05:53:56,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:53:56,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:53:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:53:56,562 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 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) [2021-06-05 05:53:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:56,634 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-06-05 05:53:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:53:56,636 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 [2021-06-05 05:53:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:56,652 INFO L225 Difference]: With dead ends: 186 [2021-06-05 05:53:56,653 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 05:53:56,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 05:53:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-05 05:53:56,712 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) [2021-06-05 05:53:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-06-05 05:53:56,715 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-06-05 05:53:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:56,715 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-06-05 05:53:56,715 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) [2021-06-05 05:53:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-06-05 05:53:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:53:56,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,717 INFO L521 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] [2021-06-05 05:53:56,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:53:56,718 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:56,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2114235914, now seen corresponding path program 1 times [2021-06-05 05:53:56,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:56,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447115878] [2021-06-05 05:53:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:56,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:56,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447115878] [2021-06-05 05:53:56,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447115878] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:53:56,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:53:56,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:53:56,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421589488] [2021-06-05 05:53:56,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:53:56,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:56,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:53:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:53:56,751 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) [2021-06-05 05:53:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:56,780 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-06-05 05:53:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:53:56,781 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 [2021-06-05 05:53:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:56,782 INFO L225 Difference]: With dead ends: 151 [2021-06-05 05:53:56,782 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 05:53:56,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 05:53:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-06-05 05:53:56,798 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) [2021-06-05 05:53:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-06-05 05:53:56,799 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-06-05 05:53:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:56,800 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-06-05 05:53:56,800 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) [2021-06-05 05:53:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-06-05 05:53:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:53:56,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,802 INFO L521 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] [2021-06-05 05:53:56,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:53:56,802 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1683683079, now seen corresponding path program 1 times [2021-06-05 05:53:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:56,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974029575] [2021-06-05 05:53:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:56,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:56,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974029575] [2021-06-05 05:53:56,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974029575] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:53:56,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:53:56,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:53:56,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861661724] [2021-06-05 05:53:56,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:53:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:53:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:56,876 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) [2021-06-05 05:53:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:56,946 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-06-05 05:53:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:53:56,947 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 [2021-06-05 05:53:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:56,949 INFO L225 Difference]: With dead ends: 223 [2021-06-05 05:53:56,949 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 05:53:56,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:53:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 05:53:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 05:53:56,959 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) [2021-06-05 05:53:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-06-05 05:53:56,960 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-06-05 05:53:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:56,961 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-06-05 05:53:56,961 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) [2021-06-05 05:53:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-06-05 05:53:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:53:56,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,963 INFO L521 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] [2021-06-05 05:53:56,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:53:56,963 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 71290013, now seen corresponding path program 1 times [2021-06-05 05:53:56,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:56,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899754083] [2021-06-05 05:53:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:53:57,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:57,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899754083] [2021-06-05 05:53:57,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899754083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:53:57,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:53:57,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:53:57,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368069900] [2021-06-05 05:53:57,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:53:57,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:53:57,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:57,031 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) [2021-06-05 05:53:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:57,067 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-06-05 05:53:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:53:57,068 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 [2021-06-05 05:53:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:57,070 INFO L225 Difference]: With dead ends: 344 [2021-06-05 05:53:57,070 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 05:53:57,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:53:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 05:53:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-06-05 05:53:57,082 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) [2021-06-05 05:53:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-06-05 05:53:57,083 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-06-05 05:53:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:57,083 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-06-05 05:53:57,083 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) [2021-06-05 05:53:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-06-05 05:53:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:57,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:57,086 INFO L521 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] [2021-06-05 05:53:57,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:53:57,086 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1179461309, now seen corresponding path program 2 times [2021-06-05 05:53:57,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:57,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414660764] [2021-06-05 05:53:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:53:57,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414660764] [2021-06-05 05:53:57,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414660764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073257336] [2021-06-05 05:53:57,232 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 [2021-06-05 05:53:57,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:53:57,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:53:57,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073257336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:57,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:53:57,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426829607] [2021-06-05 05:53:57,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:53:57,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:53:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:53:57,644 INFO L87 Difference]: Start difference. First operand 235 states and 657 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) [2021-06-05 05:53:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:58,398 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-06-05 05:53:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:53:58,399 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 30 [2021-06-05 05:53:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:58,402 INFO L225 Difference]: With dead ends: 545 [2021-06-05 05:53:58,402 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 05:53:58,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:53:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 05:53:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-06-05 05:53:58,414 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) [2021-06-05 05:53:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-06-05 05:53:58,415 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-06-05 05:53:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:58,416 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-06-05 05:53:58,416 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) [2021-06-05 05:53:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-06-05 05:53:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:58,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:58,417 INFO L521 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] [2021-06-05 05:53:58,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:58,641 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:58,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1066258745, now seen corresponding path program 3 times [2021-06-05 05:53:58,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:58,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353489112] [2021-06-05 05:53:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:58,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353489112] [2021-06-05 05:53:58,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353489112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899148549] [2021-06-05 05:53:58,751 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 [2021-06-05 05:53:58,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:58,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:53:58,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:59,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899148549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:59,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:59,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:53:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766167180] [2021-06-05 05:53:59,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:53:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:53:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:53:59,055 INFO L87 Difference]: Start difference. First operand 312 states and 917 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) [2021-06-05 05:53:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:59,926 INFO L93 Difference]: Finished difference Result 874 states and 2542 transitions. [2021-06-05 05:53:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:53:59,931 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 30 [2021-06-05 05:53:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:59,937 INFO L225 Difference]: With dead ends: 874 [2021-06-05 05:53:59,937 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 05:53:59,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 05:53:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 392. [2021-06-05 05:53:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0051150895140664) internal successors, (1175), 391 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1175 transitions. [2021-06-05 05:53:59,958 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1175 transitions. Word has length 30 [2021-06-05 05:53:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:59,959 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1175 transitions. [2021-06-05 05:53:59,959 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) [2021-06-05 05:53:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1175 transitions. [2021-06-05 05:53:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:59,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:59,962 INFO L521 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] [2021-06-05 05:54:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:54:00,177 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash -887660733, now seen corresponding path program 4 times [2021-06-05 05:54:00,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:00,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361793978] [2021-06-05 05:54:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:00,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:00,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361793978] [2021-06-05 05:54:00,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361793978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:00,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302346417] [2021-06-05 05:54:00,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:00,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:00,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:00,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:54:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:00,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302346417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:00,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:00,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:54:00,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336252798] [2021-06-05 05:54:00,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:54:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:00,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:54:00,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:54:00,451 INFO L87 Difference]: Start difference. First operand 392 states and 1175 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) [2021-06-05 05:54:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:00,623 INFO L93 Difference]: Finished difference Result 800 states and 2390 transitions. [2021-06-05 05:54:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:54:00,624 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 [2021-06-05 05:54:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:00,628 INFO L225 Difference]: With dead ends: 800 [2021-06-05 05:54:00,628 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 05:54:00,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:54:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 05:54:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 521. [2021-06-05 05:54:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.1134615384615385) internal successors, (1619), 520 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1619 transitions. [2021-06-05 05:54:00,646 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1619 transitions. Word has length 30 [2021-06-05 05:54:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:00,646 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1619 transitions. [2021-06-05 05:54:00,647 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) [2021-06-05 05:54:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1619 transitions. [2021-06-05 05:54:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:00,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:00,649 INFO L521 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] [2021-06-05 05:54:00,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:54:00,871 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1202859447, now seen corresponding path program 5 times [2021-06-05 05:54:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:00,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357413529] [2021-06-05 05:54:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:00,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:00,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357413529] [2021-06-05 05:54:00,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357413529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:00,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696823852] [2021-06-05 05:54:00,978 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 [2021-06-05 05:54:01,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:01,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:54:01,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696823852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:01,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:01,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 05:54:01,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647569144] [2021-06-05 05:54:01,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:54:01,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:01,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:54:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:01,220 INFO L87 Difference]: Start difference. First operand 521 states and 1619 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:02,139 INFO L93 Difference]: Finished difference Result 2062 states and 6284 transitions. [2021-06-05 05:54:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:54:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:54:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:02,150 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 05:54:02,150 INFO L226 Difference]: Without dead ends: 2062 [2021-06-05 05:54:02,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 703.9ms TimeCoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:54:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-06-05 05:54:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1269. [2021-06-05 05:54:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.1553627760252367) internal successors, (4001), 1268 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4001 transitions. [2021-06-05 05:54:02,200 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4001 transitions. Word has length 30 [2021-06-05 05:54:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:02,200 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4001 transitions. [2021-06-05 05:54:02,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4001 transitions. [2021-06-05 05:54:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:02,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:02,204 INFO L521 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] [2021-06-05 05:54:02,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:02,428 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash -180076409, now seen corresponding path program 6 times [2021-06-05 05:54:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:02,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352393455] [2021-06-05 05:54:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:02,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:02,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352393455] [2021-06-05 05:54:02,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352393455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:02,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951248152] [2021-06-05 05:54:02,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:02,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:02,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:54:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:02,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951248152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:02,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:02,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:54:02,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283084779] [2021-06-05 05:54:02,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:54:02,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:54:02,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:54:02,601 INFO L87 Difference]: Start difference. First operand 1269 states and 4001 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) [2021-06-05 05:54:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:02,772 INFO L93 Difference]: Finished difference Result 1797 states and 5545 transitions. [2021-06-05 05:54:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:54:02,773 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 [2021-06-05 05:54:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:02,781 INFO L225 Difference]: With dead ends: 1797 [2021-06-05 05:54:02,781 INFO L226 Difference]: Without dead ends: 1797 [2021-06-05 05:54:02,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-06-05 05:54:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1209. [2021-06-05 05:54:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.138245033112583) internal successors, (3791), 1208 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3791 transitions. [2021-06-05 05:54:02,820 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3791 transitions. Word has length 30 [2021-06-05 05:54:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:02,821 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3791 transitions. [2021-06-05 05:54:02,821 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) [2021-06-05 05:54:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3791 transitions. [2021-06-05 05:54:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:02,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:02,824 INFO L521 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] [2021-06-05 05:54:03,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:54:03,046 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:03,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1004171587, now seen corresponding path program 7 times [2021-06-05 05:54:03,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:03,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512117828] [2021-06-05 05:54:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512117828] [2021-06-05 05:54:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512117828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577703684] [2021-06-05 05:54:03,117 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 [2021-06-05 05:54:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:54:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:03,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577703684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:03,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:03,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:54:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48023668] [2021-06-05 05:54:03,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:54:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:54:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:54:03,244 INFO L87 Difference]: Start difference. First operand 1209 states and 3791 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) [2021-06-05 05:54:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:03,394 INFO L93 Difference]: Finished difference Result 2345 states and 7301 transitions. [2021-06-05 05:54:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:54:03,395 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 [2021-06-05 05:54:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:03,406 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 05:54:03,406 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 05:54:03,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:54:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 05:54:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1749. [2021-06-05 05:54:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.230549199084668) internal successors, (5647), 1748 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5647 transitions. [2021-06-05 05:54:03,458 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5647 transitions. Word has length 30 [2021-06-05 05:54:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:03,458 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5647 transitions. [2021-06-05 05:54:03,458 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) [2021-06-05 05:54:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5647 transitions. [2021-06-05 05:54:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:03,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:03,462 INFO L521 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] [2021-06-05 05:54:03,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:03,687 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash 612200489, now seen corresponding path program 8 times [2021-06-05 05:54:03,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:03,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621281523] [2021-06-05 05:54:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:03,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:03,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621281523] [2021-06-05 05:54:03,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621281523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:03,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496622216] [2021-06-05 05:54:03,766 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 [2021-06-05 05:54:03,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:54:03,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:04,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496622216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:04,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:04,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 05:54:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328488719] [2021-06-05 05:54:04,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:54:04,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:04,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:54:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:04,084 INFO L87 Difference]: Start difference. First operand 1749 states and 5647 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) [2021-06-05 05:54:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:04,613 INFO L93 Difference]: Finished difference Result 2383 states and 7508 transitions. [2021-06-05 05:54:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:54:04,614 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 [2021-06-05 05:54:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:04,625 INFO L225 Difference]: With dead ends: 2383 [2021-06-05 05:54:04,625 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 05:54:04,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:54:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 05:54:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1915. [2021-06-05 05:54:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.239811912225705) internal successors, (6201), 1914 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6201 transitions. [2021-06-05 05:54:04,701 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6201 transitions. Word has length 32 [2021-06-05 05:54:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:04,701 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 6201 transitions. [2021-06-05 05:54:04,702 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) [2021-06-05 05:54:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6201 transitions. [2021-06-05 05:54:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:04,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:04,706 INFO L521 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] [2021-06-05 05:54:04,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:04,929 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash 533920293, now seen corresponding path program 9 times [2021-06-05 05:54:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:04,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999443869] [2021-06-05 05:54:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:05,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:05,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999443869] [2021-06-05 05:54:05,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999443869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:05,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793771469] [2021-06-05 05:54:05,015 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 [2021-06-05 05:54:05,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:54:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:54:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:05,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793771469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:05,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:05,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:54:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643845484] [2021-06-05 05:54:05,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:54:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:54:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:54:05,191 INFO L87 Difference]: Start difference. First operand 1915 states and 6201 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:05,913 INFO L93 Difference]: Finished difference Result 3613 states and 11319 transitions. [2021-06-05 05:54:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:54:05,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:54:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:05,931 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 05:54:05,931 INFO L226 Difference]: Without dead ends: 3613 [2021-06-05 05:54:05,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:54:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-06-05 05:54:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2052. [2021-06-05 05:54:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.2457337883959045) internal successors, (6657), 2051 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6657 transitions. [2021-06-05 05:54:06,025 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6657 transitions. Word has length 32 [2021-06-05 05:54:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:06,025 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6657 transitions. [2021-06-05 05:54:06,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6657 transitions. [2021-06-05 05:54:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:06,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:06,030 INFO L521 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] [2021-06-05 05:54:06,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:54:06,253 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1903600235, now seen corresponding path program 10 times [2021-06-05 05:54:06,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:06,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708688398] [2021-06-05 05:54:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708688398] [2021-06-05 05:54:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708688398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302925247] [2021-06-05 05:54:06,356 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 [2021-06-05 05:54:06,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:06,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:54:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302925247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:06,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 05:54:06,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373532055] [2021-06-05 05:54:06,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:54:06,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:06,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:54:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:06,536 INFO L87 Difference]: Start difference. First operand 2052 states and 6657 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:06,911 INFO L93 Difference]: Finished difference Result 4372 states and 13767 transitions. [2021-06-05 05:54:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:54:06,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:06,927 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 05:54:06,927 INFO L226 Difference]: Without dead ends: 4372 [2021-06-05 05:54:06,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:54:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-06-05 05:54:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3140. [2021-06-05 05:54:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.294361261548264) internal successors, (10341), 3139 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 10341 transitions. [2021-06-05 05:54:07,021 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 10341 transitions. Word has length 32 [2021-06-05 05:54:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:07,021 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 10341 transitions. [2021-06-05 05:54:07,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 10341 transitions. [2021-06-05 05:54:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:07,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:07,029 INFO L521 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] [2021-06-05 05:54:07,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:07,245 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2089630951, now seen corresponding path program 11 times [2021-06-05 05:54:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:07,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348027588] [2021-06-05 05:54:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:07,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:07,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348027588] [2021-06-05 05:54:07,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348027588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:07,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936292462] [2021-06-05 05:54:07,345 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 [2021-06-05 05:54:07,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:54:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:07,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936292462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:07,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:07,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 05:54:07,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601839800] [2021-06-05 05:54:07,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:54:07,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:07,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:54:07,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:54:07,605 INFO L87 Difference]: Start difference. First operand 3140 states and 10341 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:09,229 INFO L93 Difference]: Finished difference Result 9020 states and 28737 transitions. [2021-06-05 05:54:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:54:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:09,254 INFO L225 Difference]: With dead ends: 9020 [2021-06-05 05:54:09,254 INFO L226 Difference]: Without dead ends: 9020 [2021-06-05 05:54:09,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1253.0ms TimeCoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:54:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-06-05 05:54:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 5832. [2021-06-05 05:54:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.3656319670725434) internal successors, (19625), 5831 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19625 transitions. [2021-06-05 05:54:09,424 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19625 transitions. Word has length 32 [2021-06-05 05:54:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:09,424 INFO L482 AbstractCegarLoop]: Abstraction has 5832 states and 19625 transitions. [2021-06-05 05:54:09,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19625 transitions. [2021-06-05 05:54:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:09,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:09,434 INFO L521 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] [2021-06-05 05:54:09,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:09,657 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -379569387, now seen corresponding path program 12 times [2021-06-05 05:54:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466326913] [2021-06-05 05:54:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:09,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466326913] [2021-06-05 05:54:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466326913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404719938] [2021-06-05 05:54:09,762 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 [2021-06-05 05:54:09,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:09,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:54:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404719938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:09,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-06-05 05:54:09,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112995721] [2021-06-05 05:54:09,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:54:09,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:09,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:54:09,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:09,886 INFO L87 Difference]: Start difference. First operand 5832 states and 19625 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) [2021-06-05 05:54:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:10,977 INFO L93 Difference]: Finished difference Result 12646 states and 40893 transitions. [2021-06-05 05:54:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:54:10,979 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 [2021-06-05 05:54:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:11,012 INFO L225 Difference]: With dead ends: 12646 [2021-06-05 05:54:11,012 INFO L226 Difference]: Without dead ends: 12646 [2021-06-05 05:54:11,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 756.7ms TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:54:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2021-06-05 05:54:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 6547. [2021-06-05 05:54:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 3.340360525511763) internal successors, (21866), 6546 states have internal predecessors, (21866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 21866 transitions. [2021-06-05 05:54:11,241 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 21866 transitions. Word has length 32 [2021-06-05 05:54:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:11,242 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 21866 transitions. [2021-06-05 05:54:11,242 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) [2021-06-05 05:54:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 21866 transitions. [2021-06-05 05:54:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:11,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:11,284 INFO L521 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] [2021-06-05 05:54:11,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:54:11,501 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2122812367, now seen corresponding path program 13 times [2021-06-05 05:54:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:11,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857658449] [2021-06-05 05:54:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:54:11,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857658449] [2021-06-05 05:54:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857658449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494671750] [2021-06-05 05:54:11,583 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 [2021-06-05 05:54:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:54:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:54:11,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494671750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:11,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:11,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:54:11,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368708304] [2021-06-05 05:54:11,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:54:11,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:11,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:54:11,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:54:11,678 INFO L87 Difference]: Start difference. First operand 6547 states and 21866 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) [2021-06-05 05:54:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:11,803 INFO L93 Difference]: Finished difference Result 8397 states and 27709 transitions. [2021-06-05 05:54:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:54:11,803 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 [2021-06-05 05:54:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:11,822 INFO L225 Difference]: With dead ends: 8397 [2021-06-05 05:54:11,822 INFO L226 Difference]: Without dead ends: 8397 [2021-06-05 05:54:11,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:54:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-06-05 05:54:11,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6574. [2021-06-05 05:54:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 3.3476342613722805) internal successors, (22004), 6573 states have internal predecessors, (22004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 22004 transitions. [2021-06-05 05:54:12,002 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 22004 transitions. Word has length 32 [2021-06-05 05:54:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:12,002 INFO L482 AbstractCegarLoop]: Abstraction has 6574 states and 22004 transitions. [2021-06-05 05:54:12,002 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) [2021-06-05 05:54:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 22004 transitions. [2021-06-05 05:54:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:12,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:12,013 INFO L521 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] [2021-06-05 05:54:12,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:54:12,229 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1254099961, now seen corresponding path program 14 times [2021-06-05 05:54:12,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:12,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157492971] [2021-06-05 05:54:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:12,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157492971] [2021-06-05 05:54:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157492971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123226978] [2021-06-05 05:54:12,569 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 [2021-06-05 05:54:12,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:12,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:54:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123226978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:13,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:54:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402449901] [2021-06-05 05:54:13,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:54:13,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:13,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:54:13,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:54:13,353 INFO L87 Difference]: Start difference. First operand 6574 states and 22004 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) [2021-06-05 05:54:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:15,577 INFO L93 Difference]: Finished difference Result 8244 states and 26601 transitions. [2021-06-05 05:54:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:54:15,577 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 [2021-06-05 05:54:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:15,603 INFO L225 Difference]: With dead ends: 8244 [2021-06-05 05:54:15,604 INFO L226 Difference]: Without dead ends: 8170 [2021-06-05 05:54:15,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1755.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:54:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-06-05 05:54:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 6796. [2021-06-05 05:54:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.33495217071376) internal successors, (22661), 6795 states have internal predecessors, (22661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22661 transitions. [2021-06-05 05:54:15,814 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22661 transitions. Word has length 34 [2021-06-05 05:54:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:15,814 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22661 transitions. [2021-06-05 05:54:15,814 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) [2021-06-05 05:54:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22661 transitions. [2021-06-05 05:54:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:15,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:15,825 INFO L521 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] [2021-06-05 05:54:16,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:54:16,041 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash -695063545, now seen corresponding path program 15 times [2021-06-05 05:54:16,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:16,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123164067] [2021-06-05 05:54:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:16,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:16,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123164067] [2021-06-05 05:54:16,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123164067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:16,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143519254] [2021-06-05 05:54:16,382 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 [2021-06-05 05:54:16,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:16,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:16,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:54:16,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:17,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143519254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:17,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:17,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-06-05 05:54:17,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173224419] [2021-06-05 05:54:17,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:54:17,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:17,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:54:17,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:54:17,091 INFO L87 Difference]: Start difference. First operand 6796 states and 22661 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) [2021-06-05 05:54:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:21,005 INFO L93 Difference]: Finished difference Result 12070 states and 38381 transitions. [2021-06-05 05:54:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:54:21,005 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 [2021-06-05 05:54:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:21,038 INFO L225 Difference]: With dead ends: 12070 [2021-06-05 05:54:21,038 INFO L226 Difference]: Without dead ends: 11996 [2021-06-05 05:54:21,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 3086.2ms TimeCoverageRelationStatistics Valid=1280, Invalid=6376, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:54:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-06-05 05:54:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 7004. [2021-06-05 05:54:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 3.3399971440811083) internal successors, (23390), 7003 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 23390 transitions. [2021-06-05 05:54:21,298 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 23390 transitions. Word has length 34 [2021-06-05 05:54:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:21,298 INFO L482 AbstractCegarLoop]: Abstraction has 7004 states and 23390 transitions. [2021-06-05 05:54:21,298 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) [2021-06-05 05:54:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 23390 transitions. [2021-06-05 05:54:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:21,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:21,309 INFO L521 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] [2021-06-05 05:54:21,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:21,534 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1711109379, now seen corresponding path program 16 times [2021-06-05 05:54:21,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:21,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153142652] [2021-06-05 05:54:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:21,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153142652] [2021-06-05 05:54:21,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153142652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:21,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117081272] [2021-06-05 05:54:21,810 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 [2021-06-05 05:54:21,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:21,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:54:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117081272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:22,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:22,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:54:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157643352] [2021-06-05 05:54:22,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:54:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:22,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:54:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:54:22,634 INFO L87 Difference]: Start difference. First operand 7004 states and 23390 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) [2021-06-05 05:54:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:25,062 INFO L93 Difference]: Finished difference Result 13107 states and 41620 transitions. [2021-06-05 05:54:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:54:25,062 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 [2021-06-05 05:54:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:25,082 INFO L225 Difference]: With dead ends: 13107 [2021-06-05 05:54:25,082 INFO L226 Difference]: Without dead ends: 13046 [2021-06-05 05:54:25,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2235.2ms TimeCoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:54:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-06-05 05:54:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 7052. [2021-06-05 05:54:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 3.3450574386611827) internal successors, (23586), 7051 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 23586 transitions. [2021-06-05 05:54:25,267 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 23586 transitions. Word has length 34 [2021-06-05 05:54:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:25,268 INFO L482 AbstractCegarLoop]: Abstraction has 7052 states and 23586 transitions. [2021-06-05 05:54:25,268 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) [2021-06-05 05:54:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 23586 transitions. [2021-06-05 05:54:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:25,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:25,279 INFO L521 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] [2021-06-05 05:54:25,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:25,502 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash -316136445, now seen corresponding path program 17 times [2021-06-05 05:54:25,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:25,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393840052] [2021-06-05 05:54:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:25,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:25,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393840052] [2021-06-05 05:54:25,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393840052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:25,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533048700] [2021-06-05 05:54:25,771 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 [2021-06-05 05:54:25,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:54:25,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:54:25,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:26,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533048700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:26,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:26,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 05:54:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377655563] [2021-06-05 05:54:26,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:54:26,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:26,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:54:26,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:54:26,502 INFO L87 Difference]: Start difference. First operand 7052 states and 23586 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) [2021-06-05 05:54:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:30,260 INFO L93 Difference]: Finished difference Result 15153 states and 48281 transitions. [2021-06-05 05:54:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:54:30,260 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 [2021-06-05 05:54:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:30,290 INFO L225 Difference]: With dead ends: 15153 [2021-06-05 05:54:30,291 INFO L226 Difference]: Without dead ends: 15073 [2021-06-05 05:54:30,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3084.5ms TimeCoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:54:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-06-05 05:54:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 7120. [2021-06-05 05:54:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.345975558364939) internal successors, (23820), 7119 states have internal predecessors, (23820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 23820 transitions. [2021-06-05 05:54:30,523 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 23820 transitions. Word has length 34 [2021-06-05 05:54:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:30,524 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 23820 transitions. [2021-06-05 05:54:30,524 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) [2021-06-05 05:54:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 23820 transitions. [2021-06-05 05:54:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:30,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:30,536 INFO L521 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] [2021-06-05 05:54:30,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:30,753 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1006112687, now seen corresponding path program 18 times [2021-06-05 05:54:30,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:30,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83743795] [2021-06-05 05:54:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83743795] [2021-06-05 05:54:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83743795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619050560] [2021-06-05 05:54:31,077 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 [2021-06-05 05:54:31,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:54:31,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:54:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619050560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:31,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-06-05 05:54:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955741311] [2021-06-05 05:54:31,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:54:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:54:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:54:31,778 INFO L87 Difference]: Start difference. First operand 7120 states and 23820 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) [2021-06-05 05:54:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:33,639 INFO L93 Difference]: Finished difference Result 10976 states and 35019 transitions. [2021-06-05 05:54:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:54:33,639 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 [2021-06-05 05:54:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:33,658 INFO L225 Difference]: With dead ends: 10976 [2021-06-05 05:54:33,658 INFO L226 Difference]: Without dead ends: 10902 [2021-06-05 05:54:33,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1559.9ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:54:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-06-05 05:54:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 7382. [2021-06-05 05:54:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.341959084134941) internal successors, (24667), 7381 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 24667 transitions. [2021-06-05 05:54:33,848 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 24667 transitions. Word has length 34 [2021-06-05 05:54:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:33,848 INFO L482 AbstractCegarLoop]: Abstraction has 7382 states and 24667 transitions. [2021-06-05 05:54:33,848 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) [2021-06-05 05:54:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 24667 transitions. [2021-06-05 05:54:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:33,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:33,862 INFO L521 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] [2021-06-05 05:54:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:34,081 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1609354065, now seen corresponding path program 19 times [2021-06-05 05:54:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275050946] [2021-06-05 05:54:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:34,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:34,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275050946] [2021-06-05 05:54:34,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275050946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:34,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552148731] [2021-06-05 05:54:34,374 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 [2021-06-05 05:54:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:34,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:54:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:35,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552148731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:35,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:35,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 05:54:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840043011] [2021-06-05 05:54:35,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:35,225 INFO L87 Difference]: Start difference. First operand 7382 states and 24667 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2021-06-05 05:54:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:39,130 INFO L93 Difference]: Finished difference Result 14490 states and 46802 transitions. [2021-06-05 05:54:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:54:39,130 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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 [2021-06-05 05:54:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:39,154 INFO L225 Difference]: With dead ends: 14490 [2021-06-05 05:54:39,154 INFO L226 Difference]: Without dead ends: 14422 [2021-06-05 05:54:39,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 3283.6ms TimeCoverageRelationStatistics Valid=1500, Invalid=7430, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:54:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-06-05 05:54:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 7458. [2021-06-05 05:54:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.347995172321309) internal successors, (24966), 7457 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 24966 transitions. [2021-06-05 05:54:39,434 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 24966 transitions. Word has length 34 [2021-06-05 05:54:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:39,435 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 24966 transitions. [2021-06-05 05:54:39,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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) [2021-06-05 05:54:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 24966 transitions. [2021-06-05 05:54:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:39,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:39,446 INFO L521 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] [2021-06-05 05:54:39,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 05:54:39,647 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:39,648 INFO L82 PathProgramCache]: Analyzing trace with hash -891786065, now seen corresponding path program 20 times [2021-06-05 05:54:39,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:39,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478149496] [2021-06-05 05:54:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:39,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:39,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478149496] [2021-06-05 05:54:39,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478149496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:39,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597259259] [2021-06-05 05:54:39,980 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 [2021-06-05 05:54:40,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:40,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:54:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:40,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597259259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:40,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:40,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-06-05 05:54:40,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628353721] [2021-06-05 05:54:40,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:54:40,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:54:40,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:54:40,724 INFO L87 Difference]: Start difference. First operand 7458 states and 24966 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) [2021-06-05 05:54:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:44,961 INFO L93 Difference]: Finished difference Result 16738 states and 53735 transitions. [2021-06-05 05:54:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:54:44,962 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 [2021-06-05 05:54:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:44,987 INFO L225 Difference]: With dead ends: 16738 [2021-06-05 05:54:44,988 INFO L226 Difference]: Without dead ends: 16649 [2021-06-05 05:54:44,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 3463.2ms TimeCoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:54:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16649 states. [2021-06-05 05:54:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16649 to 7399. [2021-06-05 05:54:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.34279535009462) internal successors, (24730), 7398 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 24730 transitions. [2021-06-05 05:54:45,194 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 24730 transitions. Word has length 34 [2021-06-05 05:54:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:45,194 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 24730 transitions. [2021-06-05 05:54:45,195 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) [2021-06-05 05:54:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 24730 transitions. [2021-06-05 05:54:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:45,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:45,207 INFO L521 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] [2021-06-05 05:54:45,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:45,415 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 829796399, now seen corresponding path program 21 times [2021-06-05 05:54:45,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:45,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838130079] [2021-06-05 05:54:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:45,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:45,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838130079] [2021-06-05 05:54:45,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838130079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:45,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869172315] [2021-06-05 05:54:45,693 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 [2021-06-05 05:54:45,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:54:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:46,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869172315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:46,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:46,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:54:46,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504999112] [2021-06-05 05:54:46,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:54:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:54:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:54:46,312 INFO L87 Difference]: Start difference. First operand 7399 states and 24730 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) [2021-06-05 05:54:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:50,314 INFO L93 Difference]: Finished difference Result 11618 states and 37622 transitions. [2021-06-05 05:54:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:54:50,315 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 [2021-06-05 05:54:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:50,332 INFO L225 Difference]: With dead ends: 11618 [2021-06-05 05:54:50,332 INFO L226 Difference]: Without dead ends: 11538 [2021-06-05 05:54:50,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 3267.0ms TimeCoverageRelationStatistics Valid=1448, Invalid=6562, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:54:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11538 states. [2021-06-05 05:54:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11538 to 7515. [2021-06-05 05:54:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 3.344423742347618) internal successors, (25130), 7514 states have internal predecessors, (25130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 25130 transitions. [2021-06-05 05:54:50,466 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 25130 transitions. Word has length 34 [2021-06-05 05:54:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:50,466 INFO L482 AbstractCegarLoop]: Abstraction has 7515 states and 25130 transitions. [2021-06-05 05:54:50,466 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) [2021-06-05 05:54:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 25130 transitions. [2021-06-05 05:54:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:50,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:50,476 INFO L521 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] [2021-06-05 05:54:50,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 05:54:50,677 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1324004089, now seen corresponding path program 22 times [2021-06-05 05:54:50,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:50,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901332963] [2021-06-05 05:54:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:50,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901332963] [2021-06-05 05:54:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901332963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302778562] [2021-06-05 05:54:50,958 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 [2021-06-05 05:54:50,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:54:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:51,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302778562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:51,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:51,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:54:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404942358] [2021-06-05 05:54:51,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:54:51,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:54:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:54:51,605 INFO L87 Difference]: Start difference. First operand 7515 states and 25130 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) [2021-06-05 05:54:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:52,792 INFO L93 Difference]: Finished difference Result 9401 states and 30720 transitions. [2021-06-05 05:54:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:54:52,793 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 [2021-06-05 05:54:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:52,806 INFO L225 Difference]: With dead ends: 9401 [2021-06-05 05:54:52,807 INFO L226 Difference]: Without dead ends: 9333 [2021-06-05 05:54:52,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1194.9ms TimeCoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:54:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-06-05 05:54:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7545. [2021-06-05 05:54:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-06-05 05:54:52,929 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-06-05 05:54:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:52,929 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-06-05 05:54:52,930 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) [2021-06-05 05:54:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-06-05 05:54:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:52,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:52,938 INFO L521 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] [2021-06-05 05:54:53,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:54:53,139 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash -402301949, now seen corresponding path program 23 times [2021-06-05 05:54:53,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:53,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096310732] [2021-06-05 05:54:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:53,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096310732] [2021-06-05 05:54:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096310732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928923955] [2021-06-05 05:54:53,424 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 [2021-06-05 05:54:53,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:54:53,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:53,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:54:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:54,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928923955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:54,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:54,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:54:54,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051863283] [2021-06-05 05:54:54,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:54:54,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:54,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:54:54,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:54:54,071 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 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) [2021-06-05 05:54:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:55,346 INFO L93 Difference]: Finished difference Result 10842 states and 35698 transitions. [2021-06-05 05:54:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:54:55,347 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 [2021-06-05 05:54:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:55,362 INFO L225 Difference]: With dead ends: 10842 [2021-06-05 05:54:55,362 INFO L226 Difference]: Without dead ends: 10762 [2021-06-05 05:54:55,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1304.8ms TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:54:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2021-06-05 05:54:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 7545. [2021-06-05 05:54:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-06-05 05:54:55,507 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-06-05 05:54:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:55,508 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-06-05 05:54:55,508 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) [2021-06-05 05:54:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-06-05 05:54:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:55,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:55,517 INFO L521 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] [2021-06-05 05:54:55,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:55,717 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -472411985, now seen corresponding path program 24 times [2021-06-05 05:54:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:55,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173560433] [2021-06-05 05:54:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:55,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:55,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173560433] [2021-06-05 05:54:55,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173560433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:55,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220661908] [2021-06-05 05:54:55,946 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 [2021-06-05 05:54:55,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:54:55,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:54:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:56,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220661908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:56,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:56,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:54:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777096167] [2021-06-05 05:54:56,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:54:56,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:56,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:54:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:54:56,593 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 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) [2021-06-05 05:54:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:57,742 INFO L93 Difference]: Finished difference Result 10057 states and 33260 transitions. [2021-06-05 05:54:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:54:57,743 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 [2021-06-05 05:54:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:57,759 INFO L225 Difference]: With dead ends: 10057 [2021-06-05 05:54:57,759 INFO L226 Difference]: Without dead ends: 9977 [2021-06-05 05:54:57,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1177.7ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:54:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-06-05 05:54:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 7549. [2021-06-05 05:54:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 7548 states have (on average 3.34525702172761) internal successors, (25250), 7548 states have internal predecessors, (25250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 25250 transitions. [2021-06-05 05:54:57,896 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 25250 transitions. Word has length 34 [2021-06-05 05:54:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:57,897 INFO L482 AbstractCegarLoop]: Abstraction has 7549 states and 25250 transitions. [2021-06-05 05:54:57,897 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) [2021-06-05 05:54:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 25250 transitions. [2021-06-05 05:54:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:57,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:57,906 INFO L521 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] [2021-06-05 05:54:58,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 05:54:58,106 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:58,107 INFO L82 PathProgramCache]: Analyzing trace with hash 290892395, now seen corresponding path program 25 times [2021-06-05 05:54:58,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:58,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600440306] [2021-06-05 05:54:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:58,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600440306] [2021-06-05 05:54:58,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600440306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:58,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127521140] [2021-06-05 05:54:58,383 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 [2021-06-05 05:54:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:58,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:54:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:59,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127521140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:59,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:59,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:54:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183568020] [2021-06-05 05:54:59,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:54:59,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:54:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:54:59,102 INFO L87 Difference]: Start difference. First operand 7549 states and 25250 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) [2021-06-05 05:55:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:00,716 INFO L93 Difference]: Finished difference Result 10304 states and 33237 transitions. [2021-06-05 05:55:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:55:00,716 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 [2021-06-05 05:55:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:00,733 INFO L225 Difference]: With dead ends: 10304 [2021-06-05 05:55:00,734 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 05:55:00,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1631.7ms TimeCoverageRelationStatistics Valid=588, Invalid=2834, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:55:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 05:55:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7672. [2021-06-05 05:55:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7671 states have (on average 3.3451961934558727) internal successors, (25661), 7671 states have internal predecessors, (25661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 25661 transitions. [2021-06-05 05:55:00,873 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 25661 transitions. Word has length 34 [2021-06-05 05:55:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:00,874 INFO L482 AbstractCegarLoop]: Abstraction has 7672 states and 25661 transitions. [2021-06-05 05:55:00,874 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) [2021-06-05 05:55:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 25661 transitions. [2021-06-05 05:55:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:00,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:00,883 INFO L521 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] [2021-06-05 05:55:01,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:01,100 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1008460395, now seen corresponding path program 26 times [2021-06-05 05:55:01,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:01,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51829292] [2021-06-05 05:55:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:01,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:01,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51829292] [2021-06-05 05:55:01,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51829292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:01,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448271891] [2021-06-05 05:55:01,350 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 [2021-06-05 05:55:01,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:01,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448271891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:01,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:01,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:55:01,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812677431] [2021-06-05 05:55:01,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:01,930 INFO L87 Difference]: Start difference. First operand 7672 states and 25661 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) [2021-06-05 05:55:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:03,902 INFO L93 Difference]: Finished difference Result 13599 states and 43266 transitions. [2021-06-05 05:55:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:55:03,903 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 [2021-06-05 05:55:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:03,926 INFO L225 Difference]: With dead ends: 13599 [2021-06-05 05:55:03,926 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 05:55:03,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1894.4ms TimeCoverageRelationStatistics Valid=814, Invalid=3346, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:55:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 05:55:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7674. [2021-06-05 05:55:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.345236543724749) internal successors, (25668), 7673 states have internal predecessors, (25668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 25668 transitions. [2021-06-05 05:55:04,094 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 25668 transitions. Word has length 34 [2021-06-05 05:55:04,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:04,094 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 25668 transitions. [2021-06-05 05:55:04,094 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) [2021-06-05 05:55:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 25668 transitions. [2021-06-05 05:55:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:04,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:04,103 INFO L521 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] [2021-06-05 05:55:04,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 05:55:04,303 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash -810749521, now seen corresponding path program 27 times [2021-06-05 05:55:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:04,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364531354] [2021-06-05 05:55:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:04,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:04,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364531354] [2021-06-05 05:55:04,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364531354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:04,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865349] [2021-06-05 05:55:04,532 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 [2021-06-05 05:55:04,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:55:04,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:05,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:05,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:05,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:55:05,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582123852] [2021-06-05 05:55:05,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:55:05,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:55:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:05,193 INFO L87 Difference]: Start difference. First operand 7674 states and 25668 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) [2021-06-05 05:55:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:06,290 INFO L93 Difference]: Finished difference Result 10242 states and 33864 transitions. [2021-06-05 05:55:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:55:06,290 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 [2021-06-05 05:55:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:06,306 INFO L225 Difference]: With dead ends: 10242 [2021-06-05 05:55:06,306 INFO L226 Difference]: Without dead ends: 10162 [2021-06-05 05:55:06,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1145.9ms TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:55:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-06-05 05:55:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 7686. [2021-06-05 05:55:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7686 states, 7685 states have (on average 3.34469746258946) internal successors, (25704), 7685 states have internal predecessors, (25704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7686 states to 7686 states and 25704 transitions. [2021-06-05 05:55:06,446 INFO L78 Accepts]: Start accepts. Automaton has 7686 states and 25704 transitions. Word has length 34 [2021-06-05 05:55:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:06,446 INFO L482 AbstractCegarLoop]: Abstraction has 7686 states and 25704 transitions. [2021-06-05 05:55:06,446 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) [2021-06-05 05:55:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 7686 states and 25704 transitions. [2021-06-05 05:55:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:06,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:06,458 INFO L521 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] [2021-06-05 05:55:06,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:06,673 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2119003857, now seen corresponding path program 28 times [2021-06-05 05:55:06,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:06,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814207272] [2021-06-05 05:55:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:06,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814207272] [2021-06-05 05:55:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814207272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912380088] [2021-06-05 05:55:06,953 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 [2021-06-05 05:55:06,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:06,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:06,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:07,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912380088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:07,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:07,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:55:07,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816639429] [2021-06-05 05:55:07,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:55:07,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:07,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:55:07,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:55:07,709 INFO L87 Difference]: Start difference. First operand 7686 states and 25704 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) [2021-06-05 05:55:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:09,019 INFO L93 Difference]: Finished difference Result 11237 states and 36295 transitions. [2021-06-05 05:55:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:55:09,020 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 [2021-06-05 05:55:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:09,037 INFO L225 Difference]: With dead ends: 11237 [2021-06-05 05:55:09,037 INFO L226 Difference]: Without dead ends: 11176 [2021-06-05 05:55:09,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1493.3ms TimeCoverageRelationStatistics Valid=474, Invalid=2496, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:55:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-06-05 05:55:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 7730. [2021-06-05 05:55:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 3.3486867641350755) internal successors, (25882), 7729 states have internal predecessors, (25882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 25882 transitions. [2021-06-05 05:55:09,184 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 25882 transitions. Word has length 34 [2021-06-05 05:55:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:09,184 INFO L482 AbstractCegarLoop]: Abstraction has 7730 states and 25882 transitions. [2021-06-05 05:55:09,184 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) [2021-06-05 05:55:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 25882 transitions. [2021-06-05 05:55:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:09,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:09,193 INFO L521 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] [2021-06-05 05:55:09,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 05:55:09,394 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 148717615, now seen corresponding path program 29 times [2021-06-05 05:55:09,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:09,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45033717] [2021-06-05 05:55:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:09,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45033717] [2021-06-05 05:55:09,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45033717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:09,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752668552] [2021-06-05 05:55:09,666 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 [2021-06-05 05:55:09,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:55:09,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:10,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752668552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:10,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:10,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 05:55:10,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165195934] [2021-06-05 05:55:10,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:55:10,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:10,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:55:10,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:55:10,281 INFO L87 Difference]: Start difference. First operand 7730 states and 25882 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) [2021-06-05 05:55:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:12,986 INFO L93 Difference]: Finished difference Result 15447 states and 50397 transitions. [2021-06-05 05:55:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:55:12,986 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 [2021-06-05 05:55:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:13,012 INFO L225 Difference]: With dead ends: 15447 [2021-06-05 05:55:13,012 INFO L226 Difference]: Without dead ends: 15367 [2021-06-05 05:55:13,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2427.8ms TimeCoverageRelationStatistics Valid=1019, Invalid=5143, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:55:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15367 states. [2021-06-05 05:55:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15367 to 7685. [2021-06-05 05:55:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 05:55:13,180 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 05:55:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:13,180 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 05:55:13,180 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) [2021-06-05 05:55:13,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 05:55:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:13,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:13,189 INFO L521 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] [2021-06-05 05:55:13,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:13,390 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:13,390 INFO L82 PathProgramCache]: Analyzing trace with hash 873755055, now seen corresponding path program 30 times [2021-06-05 05:55:13,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:13,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018311451] [2021-06-05 05:55:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:13,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:13,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018311451] [2021-06-05 05:55:13,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018311451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:13,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644985121] [2021-06-05 05:55:13,656 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 [2021-06-05 05:55:13,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:55:13,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:14,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644985121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:14,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:14,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:55:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983832600] [2021-06-05 05:55:14,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:55:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:55:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:14,288 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 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) [2021-06-05 05:55:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:15,313 INFO L93 Difference]: Finished difference Result 10155 states and 33589 transitions. [2021-06-05 05:55:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:55:15,314 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 [2021-06-05 05:55:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:15,331 INFO L225 Difference]: With dead ends: 10155 [2021-06-05 05:55:15,331 INFO L226 Difference]: Without dead ends: 10075 [2021-06-05 05:55:15,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1141.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:55:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-06-05 05:55:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 7685. [2021-06-05 05:55:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 05:55:15,480 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 05:55:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:15,480 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 05:55:15,480 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) [2021-06-05 05:55:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 05:55:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:15,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:15,490 INFO L521 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] [2021-06-05 05:55:15,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 05:55:15,691 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1810559919, now seen corresponding path program 31 times [2021-06-05 05:55:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:15,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695347795] [2021-06-05 05:55:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:15,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:15,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695347795] [2021-06-05 05:55:15,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695347795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:15,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649078957] [2021-06-05 05:55:15,946 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 [2021-06-05 05:55:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:16,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649078957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:16,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:16,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:55:16,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993191681] [2021-06-05 05:55:16,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:16,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:16,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:16,624 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 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) [2021-06-05 05:55:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:17,596 INFO L93 Difference]: Finished difference Result 9851 states and 32529 transitions. [2021-06-05 05:55:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:55:17,597 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 [2021-06-05 05:55:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:17,613 INFO L225 Difference]: With dead ends: 9851 [2021-06-05 05:55:17,613 INFO L226 Difference]: Without dead ends: 9771 [2021-06-05 05:55:17,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1197.1ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:55:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2021-06-05 05:55:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 7685. [2021-06-05 05:55:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-06-05 05:55:17,744 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-06-05 05:55:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:17,744 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-06-05 05:55:17,744 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) [2021-06-05 05:55:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-06-05 05:55:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:17,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:17,753 INFO L521 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] [2021-06-05 05:55:17,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:17,957 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1645184831, now seen corresponding path program 32 times [2021-06-05 05:55:17,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:17,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823091548] [2021-06-05 05:55:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:18,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:18,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823091548] [2021-06-05 05:55:18,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823091548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:18,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992568974] [2021-06-05 05:55:18,276 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 [2021-06-05 05:55:18,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:18,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992568974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:18,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:18,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:55:18,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401108304] [2021-06-05 05:55:18,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:18,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:18,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:18,950 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 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) [2021-06-05 05:55:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:21,724 INFO L93 Difference]: Finished difference Result 12991 states and 42326 transitions. [2021-06-05 05:55:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:55:21,724 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 [2021-06-05 05:55:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:21,748 INFO L225 Difference]: With dead ends: 12991 [2021-06-05 05:55:21,748 INFO L226 Difference]: Without dead ends: 12911 [2021-06-05 05:55:21,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2334.3ms TimeCoverageRelationStatistics Valid=863, Invalid=4539, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:55:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-06-05 05:55:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 7733. [2021-06-05 05:55:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 7732 states have (on average 3.3441541645111226) internal successors, (25857), 7732 states have internal predecessors, (25857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 25857 transitions. [2021-06-05 05:55:21,928 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 25857 transitions. Word has length 34 [2021-06-05 05:55:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 7733 states and 25857 transitions. [2021-06-05 05:55:21,929 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) [2021-06-05 05:55:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 25857 transitions. [2021-06-05 05:55:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:21,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:21,938 INFO L521 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] [2021-06-05 05:55:22,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 05:55:22,139 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:22,139 INFO L82 PathProgramCache]: Analyzing trace with hash -508615657, now seen corresponding path program 33 times [2021-06-05 05:55:22,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:22,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002378153] [2021-06-05 05:55:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:22,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:22,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002378153] [2021-06-05 05:55:22,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002378153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:22,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559194472] [2021-06-05 05:55:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:22,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:22,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:22,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:22,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:22,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559194472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:22,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:22,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:55:22,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468904804] [2021-06-05 05:55:22,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:55:22,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:55:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:22,959 INFO L87 Difference]: Start difference. First operand 7733 states and 25857 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) [2021-06-05 05:55:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:24,536 INFO L93 Difference]: Finished difference Result 10389 states and 33911 transitions. [2021-06-05 05:55:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:55:24,536 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 [2021-06-05 05:55:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:24,551 INFO L225 Difference]: With dead ends: 10389 [2021-06-05 05:55:24,551 INFO L226 Difference]: Without dead ends: 10315 [2021-06-05 05:55:24,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1325.4ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:55:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-06-05 05:55:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 7770. [2021-06-05 05:55:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 7769 states have (on average 3.3457330415754925) internal successors, (25993), 7769 states have internal predecessors, (25993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 25993 transitions. [2021-06-05 05:55:24,701 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 25993 transitions. Word has length 34 [2021-06-05 05:55:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:24,701 INFO L482 AbstractCegarLoop]: Abstraction has 7770 states and 25993 transitions. [2021-06-05 05:55:24,702 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) [2021-06-05 05:55:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 25993 transitions. [2021-06-05 05:55:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:24,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:24,712 INFO L521 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] [2021-06-05 05:55:24,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 05:55:24,913 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash 342976447, now seen corresponding path program 34 times [2021-06-05 05:55:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:24,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815768510] [2021-06-05 05:55:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:25,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815768510] [2021-06-05 05:55:25,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815768510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110886732] [2021-06-05 05:55:25,209 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 [2021-06-05 05:55:25,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:25,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110886732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:25,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:25,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:55:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396752524] [2021-06-05 05:55:25,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:25,931 INFO L87 Difference]: Start difference. First operand 7770 states and 25993 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) [2021-06-05 05:55:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:27,429 INFO L93 Difference]: Finished difference Result 11540 states and 38141 transitions. [2021-06-05 05:55:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:55:27,430 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 [2021-06-05 05:55:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:27,447 INFO L225 Difference]: With dead ends: 11540 [2021-06-05 05:55:27,447 INFO L226 Difference]: Without dead ends: 11460 [2021-06-05 05:55:27,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1398.5ms TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:55:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2021-06-05 05:55:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 7774. [2021-06-05 05:55:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7774 states, 7773 states have (on average 3.3455551267206998) internal successors, (26005), 7773 states have internal predecessors, (26005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7774 states to 7774 states and 26005 transitions. [2021-06-05 05:55:27,587 INFO L78 Accepts]: Start accepts. Automaton has 7774 states and 26005 transitions. Word has length 34 [2021-06-05 05:55:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:27,587 INFO L482 AbstractCegarLoop]: Abstraction has 7774 states and 26005 transitions. [2021-06-05 05:55:27,587 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) [2021-06-05 05:55:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7774 states and 26005 transitions. [2021-06-05 05:55:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:27,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:27,595 INFO L521 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] [2021-06-05 05:55:27,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:27,796 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:27,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1106280827, now seen corresponding path program 35 times [2021-06-05 05:55:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116274775] [2021-06-05 05:55:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:28,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:28,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116274775] [2021-06-05 05:55:28,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116274775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:28,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608326937] [2021-06-05 05:55:28,033 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 [2021-06-05 05:55:28,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:55:28,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:28,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608326937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:28,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:28,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:55:28,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762579394] [2021-06-05 05:55:28,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:55:28,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:55:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:55:28,645 INFO L87 Difference]: Start difference. First operand 7774 states and 26005 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) [2021-06-05 05:55:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:30,532 INFO L93 Difference]: Finished difference Result 11043 states and 35560 transitions. [2021-06-05 05:55:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:55:30,532 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 [2021-06-05 05:55:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:30,548 INFO L225 Difference]: With dead ends: 11043 [2021-06-05 05:55:30,549 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 05:55:30,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1626.8ms TimeCoverageRelationStatistics Valid=597, Invalid=3063, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:55:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 05:55:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7897. [2021-06-05 05:55:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7896 states have (on average 3.3456180344478215) internal successors, (26417), 7896 states have internal predecessors, (26417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 26417 transitions. [2021-06-05 05:55:30,692 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 26417 transitions. Word has length 34 [2021-06-05 05:55:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:30,692 INFO L482 AbstractCegarLoop]: Abstraction has 7897 states and 26417 transitions. [2021-06-05 05:55:30,692 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) [2021-06-05 05:55:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 26417 transitions. [2021-06-05 05:55:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:30,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:30,701 INFO L521 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] [2021-06-05 05:55:30,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 05:55:30,901 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1823848827, now seen corresponding path program 36 times [2021-06-05 05:55:30,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:30,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757967968] [2021-06-05 05:55:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:31,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757967968] [2021-06-05 05:55:31,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757967968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788537057] [2021-06-05 05:55:31,174 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 [2021-06-05 05:55:31,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:55:31,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:31,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788537057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:31,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:31,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:55:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906441654] [2021-06-05 05:55:31,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:31,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:31,796 INFO L87 Difference]: Start difference. First operand 7897 states and 26417 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) [2021-06-05 05:55:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:33,856 INFO L93 Difference]: Finished difference Result 14412 states and 45857 transitions. [2021-06-05 05:55:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:55:33,856 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 [2021-06-05 05:55:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:33,879 INFO L225 Difference]: With dead ends: 14412 [2021-06-05 05:55:33,879 INFO L226 Difference]: Without dead ends: 14234 [2021-06-05 05:55:33,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1952.6ms TimeCoverageRelationStatistics Valid=810, Invalid=3480, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:55:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2021-06-05 05:55:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 7884. [2021-06-05 05:55:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 7883 states have (on average 3.344792591652924) internal successors, (26367), 7883 states have internal predecessors, (26367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 26367 transitions. [2021-06-05 05:55:34,056 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 26367 transitions. Word has length 34 [2021-06-05 05:55:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:34,056 INFO L482 AbstractCegarLoop]: Abstraction has 7884 states and 26367 transitions. [2021-06-05 05:55:34,056 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) [2021-06-05 05:55:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 26367 transitions. [2021-06-05 05:55:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:34,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:34,065 INFO L521 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] [2021-06-05 05:55:34,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:34,266 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:34,266 INFO L82 PathProgramCache]: Analyzing trace with hash 4638911, now seen corresponding path program 37 times [2021-06-05 05:55:34,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:34,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615423888] [2021-06-05 05:55:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:34,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:34,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615423888] [2021-06-05 05:55:34,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615423888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:34,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914184418] [2021-06-05 05:55:34,510 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 [2021-06-05 05:55:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:34,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914184418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:35,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:35,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:55:35,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395673082] [2021-06-05 05:55:35,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:35,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:35,119 INFO L87 Difference]: Start difference. First operand 7884 states and 26367 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) [2021-06-05 05:55:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:36,401 INFO L93 Difference]: Finished difference Result 11462 states and 37893 transitions. [2021-06-05 05:55:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:55:36,401 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 [2021-06-05 05:55:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:36,419 INFO L225 Difference]: With dead ends: 11462 [2021-06-05 05:55:36,420 INFO L226 Difference]: Without dead ends: 11382 [2021-06-05 05:55:36,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1221.5ms TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:55:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2021-06-05 05:55:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 7876. [2021-06-05 05:55:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 3.345142857142857) internal successors, (26343), 7875 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 26343 transitions. [2021-06-05 05:55:36,605 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 26343 transitions. Word has length 34 [2021-06-05 05:55:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:36,605 INFO L482 AbstractCegarLoop]: Abstraction has 7876 states and 26343 transitions. [2021-06-05 05:55:36,605 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) [2021-06-05 05:55:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 26343 transitions. [2021-06-05 05:55:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:36,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:36,614 INFO L521 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] [2021-06-05 05:55:36,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 05:55:36,815 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash 809080239, now seen corresponding path program 38 times [2021-06-05 05:55:36,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:36,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761558592] [2021-06-05 05:55:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:37,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:37,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761558592] [2021-06-05 05:55:37,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761558592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:37,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597508751] [2021-06-05 05:55:37,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:37,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:37,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597508751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:37,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:37,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:55:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88430271] [2021-06-05 05:55:37,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:37,628 INFO L87 Difference]: Start difference. First operand 7876 states and 26343 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) [2021-06-05 05:55:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:40,529 INFO L93 Difference]: Finished difference Result 11431 states and 37218 transitions. [2021-06-05 05:55:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:55:40,530 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 [2021-06-05 05:55:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:40,547 INFO L225 Difference]: With dead ends: 11431 [2021-06-05 05:55:40,547 INFO L226 Difference]: Without dead ends: 11364 [2021-06-05 05:55:40,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2472.0ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:55:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11364 states. [2021-06-05 05:55:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11364 to 8088. [2021-06-05 05:55:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8088 states, 8087 states have (on average 3.344503524174601) internal successors, (27047), 8087 states have internal predecessors, (27047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 27047 transitions. [2021-06-05 05:55:40,704 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 27047 transitions. Word has length 34 [2021-06-05 05:55:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:40,704 INFO L482 AbstractCegarLoop]: Abstraction has 8088 states and 27047 transitions. [2021-06-05 05:55:40,704 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) [2021-06-05 05:55:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 27047 transitions. [2021-06-05 05:55:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:40,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:40,713 INFO L521 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] [2021-06-05 05:55:40,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 05:55:40,914 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:40,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1344720249, now seen corresponding path program 39 times [2021-06-05 05:55:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:40,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010480181] [2021-06-05 05:55:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:41,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:41,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010480181] [2021-06-05 05:55:41,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010480181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:41,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608179776] [2021-06-05 05:55:41,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:41,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:41,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:41,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:41,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608179776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:41,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:41,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:55:41,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311048138] [2021-06-05 05:55:41,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:55:41,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:55:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:41,705 INFO L87 Difference]: Start difference. First operand 8088 states and 27047 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) [2021-06-05 05:55:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:43,892 INFO L93 Difference]: Finished difference Result 11398 states and 37361 transitions. [2021-06-05 05:55:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:55:43,892 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 [2021-06-05 05:55:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:43,909 INFO L225 Difference]: With dead ends: 11398 [2021-06-05 05:55:43,909 INFO L226 Difference]: Without dead ends: 11324 [2021-06-05 05:55:43,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1866.6ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:55:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-06-05 05:55:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 8124. [2021-06-05 05:55:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.345931306167672) internal successors, (27179), 8123 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 27179 transitions. [2021-06-05 05:55:44,070 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 27179 transitions. Word has length 34 [2021-06-05 05:55:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:44,070 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 27179 transitions. [2021-06-05 05:55:44,070 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) [2021-06-05 05:55:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 27179 transitions. [2021-06-05 05:55:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:44,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:44,081 INFO L521 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] [2021-06-05 05:55:44,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:44,281 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:44,282 INFO L82 PathProgramCache]: Analyzing trace with hash -493128145, now seen corresponding path program 40 times [2021-06-05 05:55:44,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:44,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612794995] [2021-06-05 05:55:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:44,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:44,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612794995] [2021-06-05 05:55:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612794995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:44,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353561991] [2021-06-05 05:55:44,556 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 [2021-06-05 05:55:44,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:44,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:45,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353561991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:45,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:45,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:55:45,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636901045] [2021-06-05 05:55:45,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:45,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:45,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:45,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:45,127 INFO L87 Difference]: Start difference. First operand 8124 states and 27179 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) [2021-06-05 05:55:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:46,556 INFO L93 Difference]: Finished difference Result 12758 states and 41655 transitions. [2021-06-05 05:55:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:55:46,556 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 [2021-06-05 05:55:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:46,580 INFO L225 Difference]: With dead ends: 12758 [2021-06-05 05:55:46,580 INFO L226 Difference]: Without dead ends: 12678 [2021-06-05 05:55:46,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1389.7ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:55:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-06-05 05:55:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 8126. [2021-06-05 05:55:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8126 states, 8125 states have (on average 3.345846153846154) internal successors, (27185), 8125 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8126 states to 8126 states and 27185 transitions. [2021-06-05 05:55:46,748 INFO L78 Accepts]: Start accepts. Automaton has 8126 states and 27185 transitions. Word has length 34 [2021-06-05 05:55:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:46,748 INFO L482 AbstractCegarLoop]: Abstraction has 8126 states and 27185 transitions. [2021-06-05 05:55:46,749 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) [2021-06-05 05:55:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 8126 states and 27185 transitions. [2021-06-05 05:55:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:46,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:46,759 INFO L521 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] [2021-06-05 05:55:46,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 05:55:46,959 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash 270176235, now seen corresponding path program 41 times [2021-06-05 05:55:46,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:46,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572209524] [2021-06-05 05:55:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:47,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:47,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572209524] [2021-06-05 05:55:47,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572209524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:47,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856035361] [2021-06-05 05:55:47,328 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 [2021-06-05 05:55:47,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:55:47,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:47,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:48,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856035361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:48,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:48,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:55:48,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694945596] [2021-06-05 05:55:48,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:55:48,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:55:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:55:48,004 INFO L87 Difference]: Start difference. First operand 8126 states and 27185 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) [2021-06-05 05:55:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:50,704 INFO L93 Difference]: Finished difference Result 13402 states and 43284 transitions. [2021-06-05 05:55:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:55:50,711 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 [2021-06-05 05:55:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:50,733 INFO L225 Difference]: With dead ends: 13402 [2021-06-05 05:55:50,733 INFO L226 Difference]: Without dead ends: 13334 [2021-06-05 05:55:50,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2356.0ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:55:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2021-06-05 05:55:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 8624. [2021-06-05 05:55:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.339325060883683) internal successors, (28795), 8623 states have internal predecessors, (28795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 28795 transitions. [2021-06-05 05:55:50,942 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 28795 transitions. Word has length 34 [2021-06-05 05:55:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:50,942 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 28795 transitions. [2021-06-05 05:55:50,942 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) [2021-06-05 05:55:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 28795 transitions. [2021-06-05 05:55:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:50,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:50,952 INFO L521 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] [2021-06-05 05:55:51,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:51,153 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash 987744235, now seen corresponding path program 42 times [2021-06-05 05:55:51,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:51,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549296152] [2021-06-05 05:55:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:51,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:51,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549296152] [2021-06-05 05:55:51,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549296152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:51,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351235031] [2021-06-05 05:55:51,453 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 [2021-06-05 05:55:51,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:55:51,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:51,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:52,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351235031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:52,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:52,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:55:52,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700615398] [2021-06-05 05:55:52,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:52,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:52,025 INFO L87 Difference]: Start difference. First operand 8624 states and 28795 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) [2021-06-05 05:55:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:53,784 INFO L93 Difference]: Finished difference Result 16986 states and 55205 transitions. [2021-06-05 05:55:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:55:53,785 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 [2021-06-05 05:55:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:53,813 INFO L225 Difference]: With dead ends: 16986 [2021-06-05 05:55:53,813 INFO L226 Difference]: Without dead ends: 16888 [2021-06-05 05:55:53,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:55:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16888 states. [2021-06-05 05:55:54,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16888 to 8622. [2021-06-05 05:55:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.3391717898155666) internal successors, (28787), 8621 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 28787 transitions. [2021-06-05 05:55:54,030 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 28787 transitions. Word has length 34 [2021-06-05 05:55:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:54,030 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 28787 transitions. [2021-06-05 05:55:54,030 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) [2021-06-05 05:55:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 28787 transitions. [2021-06-05 05:55:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:54,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:54,041 INFO L521 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] [2021-06-05 05:55:54,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 05:55:54,241 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash -831465681, now seen corresponding path program 43 times [2021-06-05 05:55:54,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:54,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628815725] [2021-06-05 05:55:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:54,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628815725] [2021-06-05 05:55:54,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628815725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:54,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318844989] [2021-06-05 05:55:54,549 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 [2021-06-05 05:55:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:55:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318844989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:55,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:55,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:55:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80982240] [2021-06-05 05:55:55,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:55:55,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:55:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:55:55,105 INFO L87 Difference]: Start difference. First operand 8622 states and 28787 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) [2021-06-05 05:55:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:56,662 INFO L93 Difference]: Finished difference Result 14190 states and 46183 transitions. [2021-06-05 05:55:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:55:56,662 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 [2021-06-05 05:55:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:56,684 INFO L225 Difference]: With dead ends: 14190 [2021-06-05 05:55:56,685 INFO L226 Difference]: Without dead ends: 14110 [2021-06-05 05:55:56,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1453.2ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:55:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14110 states. [2021-06-05 05:55:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14110 to 8630. [2021-06-05 05:55:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 3.3388573415227722) internal successors, (28811), 8629 states have internal predecessors, (28811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 28811 transitions. [2021-06-05 05:55:56,857 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 28811 transitions. Word has length 34 [2021-06-05 05:55:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:56,858 INFO L482 AbstractCegarLoop]: Abstraction has 8630 states and 28811 transitions. [2021-06-05 05:55:56,858 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) [2021-06-05 05:55:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 28811 transitions. [2021-06-05 05:55:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:56,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:56,867 INFO L521 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] [2021-06-05 05:55:57,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:57,068 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash -743901889, now seen corresponding path program 44 times [2021-06-05 05:55:57,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:57,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031687839] [2021-06-05 05:55:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:57,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031687839] [2021-06-05 05:55:57,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031687839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824514656] [2021-06-05 05:55:57,372 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 [2021-06-05 05:55:57,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:57,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:55:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:57,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824514656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:57,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:57,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:55:57,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878974325] [2021-06-05 05:55:57,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:55:57,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:57,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:55:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:57,984 INFO L87 Difference]: Start difference. First operand 8630 states and 28811 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) [2021-06-05 05:56:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:01,053 INFO L93 Difference]: Finished difference Result 15771 states and 50789 transitions. [2021-06-05 05:56:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:56:01,053 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 [2021-06-05 05:56:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:01,078 INFO L225 Difference]: With dead ends: 15771 [2021-06-05 05:56:01,078 INFO L226 Difference]: Without dead ends: 15691 [2021-06-05 05:56:01,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2649.2ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:56:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15691 states. [2021-06-05 05:56:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15691 to 9020. [2021-06-05 05:56:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 9019 states have (on average 3.351036700299368) internal successors, (30223), 9019 states have internal predecessors, (30223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 30223 transitions. [2021-06-05 05:56:01,306 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 30223 transitions. Word has length 34 [2021-06-05 05:56:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:01,307 INFO L482 AbstractCegarLoop]: Abstraction has 9020 states and 30223 transitions. [2021-06-05 05:56:01,307 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) [2021-06-05 05:56:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 30223 transitions. [2021-06-05 05:56:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:01,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:01,317 INFO L521 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] [2021-06-05 05:56:01,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:01,517 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1130059071, now seen corresponding path program 45 times [2021-06-05 05:56:01,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:01,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605499815] [2021-06-05 05:56:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:01,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:01,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605499815] [2021-06-05 05:56:01,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605499815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:01,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513078388] [2021-06-05 05:56:01,786 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 [2021-06-05 05:56:01,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:56:01,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513078388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:02,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:02,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:56:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235752823] [2021-06-05 05:56:02,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:56:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:56:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:56:02,410 INFO L87 Difference]: Start difference. First operand 9020 states and 30223 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) [2021-06-05 05:56:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:04,533 INFO L93 Difference]: Finished difference Result 15861 states and 52080 transitions. [2021-06-05 05:56:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:56:04,534 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 [2021-06-05 05:56:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:04,559 INFO L225 Difference]: With dead ends: 15861 [2021-06-05 05:56:04,559 INFO L226 Difference]: Without dead ends: 15781 [2021-06-05 05:56:04,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1784.3ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:56:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2021-06-05 05:56:04,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 9108. [2021-06-05 05:56:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 3.3542330075765894) internal successors, (30547), 9107 states have internal predecessors, (30547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 30547 transitions. [2021-06-05 05:56:04,815 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 30547 transitions. Word has length 34 [2021-06-05 05:56:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:04,815 INFO L482 AbstractCegarLoop]: Abstraction has 9108 states and 30547 transitions. [2021-06-05 05:56:04,815 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) [2021-06-05 05:56:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 30547 transitions. [2021-06-05 05:56:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:04,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:04,828 INFO L521 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] [2021-06-05 05:56:05,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 05:56:05,029 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 306804211, now seen corresponding path program 46 times [2021-06-05 05:56:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:05,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468428418] [2021-06-05 05:56:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:05,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468428418] [2021-06-05 05:56:05,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468428418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935932164] [2021-06-05 05:56:05,264 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 [2021-06-05 05:56:05,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:05,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:05,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:56:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935932164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:05,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:05,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:56:05,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136389661] [2021-06-05 05:56:05,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:56:05,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:56:05,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:56:05,941 INFO L87 Difference]: Start difference. First operand 9108 states and 30547 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) [2021-06-05 05:56:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:07,266 INFO L93 Difference]: Finished difference Result 14291 states and 46571 transitions. [2021-06-05 05:56:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:56:07,267 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 [2021-06-05 05:56:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:07,289 INFO L225 Difference]: With dead ends: 14291 [2021-06-05 05:56:07,289 INFO L226 Difference]: Without dead ends: 14230 [2021-06-05 05:56:07,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1375.1ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:56:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2021-06-05 05:56:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 9186. [2021-06-05 05:56:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 3.3555797495917257) internal successors, (30821), 9185 states have internal predecessors, (30821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 30821 transitions. [2021-06-05 05:56:07,468 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 30821 transitions. Word has length 34 [2021-06-05 05:56:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:07,468 INFO L482 AbstractCegarLoop]: Abstraction has 9186 states and 30821 transitions. [2021-06-05 05:56:07,468 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) [2021-06-05 05:56:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 30821 transitions. [2021-06-05 05:56:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:07,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:07,479 INFO L521 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] [2021-06-05 05:56:07,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:07,679 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:07,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1720441613, now seen corresponding path program 47 times [2021-06-05 05:56:07,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:07,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822312538] [2021-06-05 05:56:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:07,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:07,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822312538] [2021-06-05 05:56:07,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822312538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:07,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55835175] [2021-06-05 05:56:07,919 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 [2021-06-05 05:56:07,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:56:07,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:07,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:56:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:08,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55835175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:08,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:08,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 05:56:08,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533641227] [2021-06-05 05:56:08,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:56:08,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:56:08,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:56:08,560 INFO L87 Difference]: Start difference. First operand 9186 states and 30821 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) [2021-06-05 05:56:11,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:11,291 INFO L93 Difference]: Finished difference Result 19194 states and 63283 transitions. [2021-06-05 05:56:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:56:11,291 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 [2021-06-05 05:56:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:11,322 INFO L225 Difference]: With dead ends: 19194 [2021-06-05 05:56:11,322 INFO L226 Difference]: Without dead ends: 19114 [2021-06-05 05:56:11,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2186.7ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:56:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19114 states. [2021-06-05 05:56:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19114 to 9171. [2021-06-05 05:56:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.353435114503817) internal successors, (30751), 9170 states have internal predecessors, (30751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 30751 transitions. [2021-06-05 05:56:11,582 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 30751 transitions. Word has length 34 [2021-06-05 05:56:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:11,582 INFO L482 AbstractCegarLoop]: Abstraction has 9171 states and 30751 transitions. [2021-06-05 05:56:11,582 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) [2021-06-05 05:56:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 30751 transitions. [2021-06-05 05:56:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:11,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:11,594 INFO L521 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] [2021-06-05 05:56:11,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 05:56:11,794 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:11,795 INFO L82 PathProgramCache]: Analyzing trace with hash -995404173, now seen corresponding path program 48 times [2021-06-05 05:56:11,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:11,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840115830] [2021-06-05 05:56:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:12,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:12,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840115830] [2021-06-05 05:56:12,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840115830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:12,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104947918] [2021-06-05 05:56:12,024 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 [2021-06-05 05:56:12,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:56:12,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104947918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:12,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:12,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:56:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874907192] [2021-06-05 05:56:12,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:56:12,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:56:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:56:12,567 INFO L87 Difference]: Start difference. First operand 9171 states and 30751 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) [2021-06-05 05:56:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:13,951 INFO L93 Difference]: Finished difference Result 12967 states and 43188 transitions. [2021-06-05 05:56:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:56:13,951 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 [2021-06-05 05:56:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:13,975 INFO L225 Difference]: With dead ends: 12967 [2021-06-05 05:56:13,975 INFO L226 Difference]: Without dead ends: 12887 [2021-06-05 05:56:13,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1191.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:56:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12887 states. [2021-06-05 05:56:14,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12887 to 9179. [2021-06-05 05:56:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9179 states, 9178 states have (on average 3.3531270429287425) internal successors, (30775), 9178 states have internal predecessors, (30775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9179 states to 9179 states and 30775 transitions. [2021-06-05 05:56:14,148 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 30775 transitions. Word has length 34 [2021-06-05 05:56:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:14,148 INFO L482 AbstractCegarLoop]: Abstraction has 9179 states and 30775 transitions. [2021-06-05 05:56:14,148 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) [2021-06-05 05:56:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 30775 transitions. [2021-06-05 05:56:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:14,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:14,158 INFO L521 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] [2021-06-05 05:56:14,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:14,359 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:14,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1333741709, now seen corresponding path program 49 times [2021-06-05 05:56:14,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:14,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085509572] [2021-06-05 05:56:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085509572] [2021-06-05 05:56:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085509572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357840163] [2021-06-05 05:56:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:15,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357840163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:15,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:15,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:56:15,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261352167] [2021-06-05 05:56:15,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:15,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:15,332 INFO L87 Difference]: Start difference. First operand 9179 states and 30775 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) [2021-06-05 05:56:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:16,762 INFO L93 Difference]: Finished difference Result 12929 states and 43085 transitions. [2021-06-05 05:56:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:56:16,762 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 [2021-06-05 05:56:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:16,784 INFO L225 Difference]: With dead ends: 12929 [2021-06-05 05:56:16,784 INFO L226 Difference]: Without dead ends: 12849 [2021-06-05 05:56:16,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1423.1ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:56:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12849 states. [2021-06-05 05:56:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12849 to 9181. [2021-06-05 05:56:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9180 states have (on average 3.353050108932462) internal successors, (30781), 9180 states have internal predecessors, (30781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 30781 transitions. [2021-06-05 05:56:16,958 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 30781 transitions. Word has length 34 [2021-06-05 05:56:16,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:16,958 INFO L482 AbstractCegarLoop]: Abstraction has 9181 states and 30781 transitions. [2021-06-05 05:56:16,958 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) [2021-06-05 05:56:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 30781 transitions. [2021-06-05 05:56:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:16,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:16,969 INFO L521 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] [2021-06-05 05:56:17,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 05:56:17,169 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash -58599309, now seen corresponding path program 50 times [2021-06-05 05:56:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:17,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256503784] [2021-06-05 05:56:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:17,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:17,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256503784] [2021-06-05 05:56:17,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256503784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:17,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976567304] [2021-06-05 05:56:17,381 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 [2021-06-05 05:56:17,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:17,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:17,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:17,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976567304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:17,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:17,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:56:17,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034677822] [2021-06-05 05:56:17,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:56:17,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:56:17,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:56:17,961 INFO L87 Difference]: Start difference. First operand 9181 states and 30781 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) [2021-06-05 05:56:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:19,429 INFO L93 Difference]: Finished difference Result 12817 states and 42681 transitions. [2021-06-05 05:56:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:56:19,429 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 [2021-06-05 05:56:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:19,453 INFO L225 Difference]: With dead ends: 12817 [2021-06-05 05:56:19,454 INFO L226 Difference]: Without dead ends: 12737 [2021-06-05 05:56:19,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:56:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12737 states. [2021-06-05 05:56:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12737 to 9109. [2021-06-05 05:56:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9109 states, 9108 states have (on average 3.352986385595081) internal successors, (30539), 9108 states have internal predecessors, (30539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9109 states to 9109 states and 30539 transitions. [2021-06-05 05:56:19,655 INFO L78 Accepts]: Start accepts. Automaton has 9109 states and 30539 transitions. Word has length 34 [2021-06-05 05:56:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:19,655 INFO L482 AbstractCegarLoop]: Abstraction has 9109 states and 30539 transitions. [2021-06-05 05:56:19,655 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) [2021-06-05 05:56:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9109 states and 30539 transitions. [2021-06-05 05:56:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:19,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:19,666 INFO L521 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] [2021-06-05 05:56:19,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 05:56:19,869 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1116590339, now seen corresponding path program 51 times [2021-06-05 05:56:19,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:19,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408110726] [2021-06-05 05:56:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:20,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:20,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408110726] [2021-06-05 05:56:20,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408110726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:20,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077627028] [2021-06-05 05:56:20,094 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 [2021-06-05 05:56:20,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:56:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:56:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077627028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:20,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:20,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:56:20,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507192290] [2021-06-05 05:56:20,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:20,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:20,690 INFO L87 Difference]: Start difference. First operand 9109 states and 30539 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) [2021-06-05 05:56:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:22,707 INFO L93 Difference]: Finished difference Result 16652 states and 54193 transitions. [2021-06-05 05:56:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:56:22,707 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 [2021-06-05 05:56:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:22,733 INFO L225 Difference]: With dead ends: 16652 [2021-06-05 05:56:22,733 INFO L226 Difference]: Without dead ends: 16578 [2021-06-05 05:56:22,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1561.1ms TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:56:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16578 states. [2021-06-05 05:56:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16578 to 9297. [2021-06-05 05:56:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 3.3570352839931155) internal successors, (31207), 9296 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 31207 transitions. [2021-06-05 05:56:22,999 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 31207 transitions. Word has length 34 [2021-06-05 05:56:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:22,999 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 31207 transitions. [2021-06-05 05:56:22,999 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) [2021-06-05 05:56:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 31207 transitions. [2021-06-05 05:56:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:23,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:23,010 INFO L521 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] [2021-06-05 05:56:23,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:23,211 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:23,211 INFO L82 PathProgramCache]: Analyzing trace with hash -115508009, now seen corresponding path program 52 times [2021-06-05 05:56:23,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:23,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070250556] [2021-06-05 05:56:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:23,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:23,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070250556] [2021-06-05 05:56:23,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070250556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:23,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605667329] [2021-06-05 05:56:23,487 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 [2021-06-05 05:56:23,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:23,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:23,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:24,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605667329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:24,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:24,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:56:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670365621] [2021-06-05 05:56:24,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:24,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:24,186 INFO L87 Difference]: Start difference. First operand 9297 states and 31207 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) [2021-06-05 05:56:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:26,137 INFO L93 Difference]: Finished difference Result 16129 states and 53347 transitions. [2021-06-05 05:56:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:56:26,137 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 [2021-06-05 05:56:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:26,163 INFO L225 Difference]: With dead ends: 16129 [2021-06-05 05:56:26,164 INFO L226 Difference]: Without dead ends: 16049 [2021-06-05 05:56:26,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1607.5ms TimeCoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:56:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16049 states. [2021-06-05 05:56:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16049 to 9301. [2021-06-05 05:56:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-06-05 05:56:26,363 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-06-05 05:56:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:26,363 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-06-05 05:56:26,363 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) [2021-06-05 05:56:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-06-05 05:56:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:26,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:26,375 INFO L521 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] [2021-06-05 05:56:26,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 05:56:26,576 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash -185618045, now seen corresponding path program 53 times [2021-06-05 05:56:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:26,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825917153] [2021-06-05 05:56:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:26,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:26,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825917153] [2021-06-05 05:56:26,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825917153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:26,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821143402] [2021-06-05 05:56:26,789 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 [2021-06-05 05:56:26,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:56:26,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:26,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:27,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821143402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:27,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:27,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:56:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384766534] [2021-06-05 05:56:27,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:27,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:27,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:27,423 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 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) [2021-06-05 05:56:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:28,874 INFO L93 Difference]: Finished difference Result 15319 states and 50920 transitions. [2021-06-05 05:56:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:56:28,874 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 [2021-06-05 05:56:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:28,899 INFO L225 Difference]: With dead ends: 15319 [2021-06-05 05:56:28,899 INFO L226 Difference]: Without dead ends: 15239 [2021-06-05 05:56:28,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1393.4ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:56:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15239 states. [2021-06-05 05:56:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15239 to 9301. [2021-06-05 05:56:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-06-05 05:56:29,075 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-06-05 05:56:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:29,076 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-06-05 05:56:29,076 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) [2021-06-05 05:56:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-06-05 05:56:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:29,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:29,086 INFO L521 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] [2021-06-05 05:56:29,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:29,286 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1295254335, now seen corresponding path program 54 times [2021-06-05 05:56:29,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:29,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380763767] [2021-06-05 05:56:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:29,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:29,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380763767] [2021-06-05 05:56:29,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380763767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:29,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62491968] [2021-06-05 05:56:29,526 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 [2021-06-05 05:56:29,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:56:29,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:56:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:30,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62491968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:30,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:30,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-06-05 05:56:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477564279] [2021-06-05 05:56:30,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:30,089 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 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) [2021-06-05 05:56:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:32,076 INFO L93 Difference]: Finished difference Result 19306 states and 63066 transitions. [2021-06-05 05:56:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:56:32,077 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 [2021-06-05 05:56:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:32,106 INFO L225 Difference]: With dead ends: 19306 [2021-06-05 05:56:32,106 INFO L226 Difference]: Without dead ends: 19208 [2021-06-05 05:56:32,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1627.6ms TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:56:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19208 states. [2021-06-05 05:56:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19208 to 9199. [2021-06-05 05:56:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-06-05 05:56:32,314 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-06-05 05:56:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:32,314 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-06-05 05:56:32,314 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) [2021-06-05 05:56:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-06-05 05:56:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:32,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:32,324 INFO L521 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] [2021-06-05 05:56:32,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 05:56:32,525 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash -523955581, now seen corresponding path program 55 times [2021-06-05 05:56:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:32,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881918392] [2021-06-05 05:56:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:32,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:32,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881918392] [2021-06-05 05:56:32,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881918392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:32,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300777773] [2021-06-05 05:56:32,753 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 [2021-06-05 05:56:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:33,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300777773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:33,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:33,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:56:33,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906997421] [2021-06-05 05:56:33,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:33,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:33,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:33,322 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 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) [2021-06-05 05:56:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:35,024 INFO L93 Difference]: Finished difference Result 14838 states and 49288 transitions. [2021-06-05 05:56:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:56:35,025 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 [2021-06-05 05:56:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:35,049 INFO L225 Difference]: With dead ends: 14838 [2021-06-05 05:56:35,049 INFO L226 Difference]: Without dead ends: 14758 [2021-06-05 05:56:35,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1374.3ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:56:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14758 states. [2021-06-05 05:56:35,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14758 to 9199. [2021-06-05 05:56:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-06-05 05:56:35,250 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-06-05 05:56:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:35,250 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-06-05 05:56:35,250 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) [2021-06-05 05:56:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-06-05 05:56:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:56:35,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:35,261 INFO L521 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] [2021-06-05 05:56:35,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 05:56:35,469 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash -88435649, now seen corresponding path program 56 times [2021-06-05 05:56:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:35,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634649225] [2021-06-05 05:56:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:35,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:35,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634649225] [2021-06-05 05:56:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634649225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:35,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344390119] [2021-06-05 05:56:35,688 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 [2021-06-05 05:56:35,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:35,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:56:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:36,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344390119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:36,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:36,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:56:36,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846940436] [2021-06-05 05:56:36,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:56:36,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:36,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:56:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:56:36,250 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 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) [2021-06-05 05:56:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:38,070 INFO L93 Difference]: Finished difference Result 19992 states and 66552 transitions. [2021-06-05 05:56:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:56:38,070 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 [2021-06-05 05:56:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:38,103 INFO L225 Difference]: With dead ends: 19992 [2021-06-05 05:56:38,103 INFO L226 Difference]: Without dead ends: 19912 [2021-06-05 05:56:38,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1547.8ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:56:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19912 states. [2021-06-05 05:56:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19912 to 9055. [2021-06-05 05:56:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9055 states, 9054 states have (on average 3.3537662911420365) internal successors, (30365), 9054 states have internal predecessors, (30365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9055 states to 9055 states and 30365 transitions. [2021-06-05 05:56:38,349 INFO L78 Accepts]: Start accepts. Automaton has 9055 states and 30365 transitions. Word has length 34 [2021-06-05 05:56:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:38,349 INFO L482 AbstractCegarLoop]: Abstraction has 9055 states and 30365 transitions. [2021-06-05 05:56:38,350 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) [2021-06-05 05:56:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9055 states and 30365 transitions. [2021-06-05 05:56:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:56:38,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:38,360 INFO L521 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] [2021-06-05 05:56:38,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:38,561 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1561626779, now seen corresponding path program 57 times [2021-06-05 05:56:38,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:38,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704545672] [2021-06-05 05:56:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:56:38,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:38,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704545672] [2021-06-05 05:56:38,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704545672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:38,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540883] [2021-06-05 05:56:38,996 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:39,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:56:39,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:56:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:39,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:39,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:39,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:56:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721160550] [2021-06-05 05:56:39,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:56:39,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:56:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:56:39,836 INFO L87 Difference]: Start difference. First operand 9055 states and 30365 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) [2021-06-05 05:56:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:42,189 INFO L93 Difference]: Finished difference Result 12463 states and 40678 transitions. [2021-06-05 05:56:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:56:42,189 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 [2021-06-05 05:56:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:42,209 INFO L225 Difference]: With dead ends: 12463 [2021-06-05 05:56:42,209 INFO L226 Difference]: Without dead ends: 12343 [2021-06-05 05:56:42,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2132.8ms TimeCoverageRelationStatistics Valid=578, Invalid=3082, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:56:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2021-06-05 05:56:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 9161. [2021-06-05 05:56:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9161 states, 9160 states have (on average 3.3498908296943233) internal successors, (30685), 9160 states have internal predecessors, (30685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 30685 transitions. [2021-06-05 05:56:42,370 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 30685 transitions. Word has length 36 [2021-06-05 05:56:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:42,370 INFO L482 AbstractCegarLoop]: Abstraction has 9161 states and 30685 transitions. [2021-06-05 05:56:42,370 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) [2021-06-05 05:56:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 30685 transitions. [2021-06-05 05:56:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:56:42,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:42,381 INFO L521 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] [2021-06-05 05:56:42,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 05:56:42,583 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1895413349, now seen corresponding path program 58 times [2021-06-05 05:56:42,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:42,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265013924] [2021-06-05 05:56:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:56:42,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:42,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265013924] [2021-06-05 05:56:42,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265013924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:42,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337063695] [2021-06-05 05:56:42,945 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 [2021-06-05 05:56:42,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:56:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:43,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337063695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:43,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:43,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:56:43,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784712324] [2021-06-05 05:56:43,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:56:43,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:56:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:56:43,849 INFO L87 Difference]: Start difference. First operand 9161 states and 30685 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) [2021-06-05 05:56:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:45,473 INFO L93 Difference]: Finished difference Result 9978 states and 32867 transitions. [2021-06-05 05:56:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:56:45,478 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 [2021-06-05 05:56:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:45,493 INFO L225 Difference]: With dead ends: 9978 [2021-06-05 05:56:45,493 INFO L226 Difference]: Without dead ends: 9870 [2021-06-05 05:56:45,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1916.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:56:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2021-06-05 05:56:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9245. [2021-06-05 05:56:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9245 states, 9244 states have (on average 3.3443314582431847) internal successors, (30915), 9244 states have internal predecessors, (30915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9245 states to 9245 states and 30915 transitions. [2021-06-05 05:56:45,640 INFO L78 Accepts]: Start accepts. Automaton has 9245 states and 30915 transitions. Word has length 36 [2021-06-05 05:56:45,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:45,640 INFO L482 AbstractCegarLoop]: Abstraction has 9245 states and 30915 transitions. [2021-06-05 05:56:45,641 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) [2021-06-05 05:56:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9245 states and 30915 transitions. [2021-06-05 05:56:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:56:45,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:45,651 INFO L521 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] [2021-06-05 05:56:45,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:45,855 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash 834811493, now seen corresponding path program 59 times [2021-06-05 05:56:45,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:45,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325959426] [2021-06-05 05:56:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:56:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325959426] [2021-06-05 05:56:46,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325959426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:46,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659076413] [2021-06-05 05:56:46,192 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 [2021-06-05 05:56:46,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:56:46,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:46,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:56:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:46,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659076413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:46,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:46,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 05:56:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569731109] [2021-06-05 05:56:46,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:56:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:56:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:56:46,931 INFO L87 Difference]: Start difference. First operand 9245 states and 30915 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) [2021-06-05 05:56:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:48,343 INFO L93 Difference]: Finished difference Result 11017 states and 36070 transitions. [2021-06-05 05:56:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:56:48,343 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 [2021-06-05 05:56:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:48,361 INFO L225 Difference]: With dead ends: 11017 [2021-06-05 05:56:48,361 INFO L226 Difference]: Without dead ends: 10963 [2021-06-05 05:56:48,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1677.9ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:56:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2021-06-05 05:56:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 9313. [2021-06-05 05:56:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9313 states, 9312 states have (on average 3.3385953608247423) internal successors, (31089), 9312 states have internal predecessors, (31089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9313 states to 9313 states and 31089 transitions. [2021-06-05 05:56:48,527 INFO L78 Accepts]: Start accepts. Automaton has 9313 states and 31089 transitions. Word has length 36 [2021-06-05 05:56:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:48,527 INFO L482 AbstractCegarLoop]: Abstraction has 9313 states and 31089 transitions. [2021-06-05 05:56:48,528 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) [2021-06-05 05:56:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9313 states and 31089 transitions. [2021-06-05 05:56:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:56:48,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:48,540 INFO L521 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] [2021-06-05 05:56:48,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 05:56:48,742 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash -3115675, now seen corresponding path program 60 times [2021-06-05 05:56:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010776985] [2021-06-05 05:56:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:56:49,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:49,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010776985] [2021-06-05 05:56:49,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010776985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:49,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011546175] [2021-06-05 05:56:49,002 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 [2021-06-05 05:56:49,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:56:49,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:49,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:56:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:49,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011546175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:49,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:49,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:56:49,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91537294] [2021-06-05 05:56:49,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:56:49,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:49,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:56:49,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:56:49,625 INFO L87 Difference]: Start difference. First operand 9313 states and 31089 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) [2021-06-05 05:56:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:52,036 INFO L93 Difference]: Finished difference Result 10574 states and 34626 transitions. [2021-06-05 05:56:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:56:52,037 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 [2021-06-05 05:56:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:52,052 INFO L225 Difference]: With dead ends: 10574 [2021-06-05 05:56:52,052 INFO L226 Difference]: Without dead ends: 10293 [2021-06-05 05:56:52,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1953.4ms TimeCoverageRelationStatistics Valid=556, Invalid=3604, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:56:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10293 states. [2021-06-05 05:56:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10293 to 9327. [2021-06-05 05:56:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 3.3374437057688184) internal successors, (31125), 9326 states have internal predecessors, (31125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 31125 transitions. [2021-06-05 05:56:52,206 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 31125 transitions. Word has length 36 [2021-06-05 05:56:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:52,206 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 31125 transitions. [2021-06-05 05:56:52,206 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) [2021-06-05 05:56:52,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 31125 transitions. [2021-06-05 05:56:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:56:52,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:52,218 INFO L521 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] [2021-06-05 05:56:52,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:52,418 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1558016609, now seen corresponding path program 61 times [2021-06-05 05:56:52,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:52,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24263597] [2021-06-05 05:56:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:52,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:52,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24263597] [2021-06-05 05:56:52,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24263597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:52,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739910293] [2021-06-05 05:56:52,806 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 [2021-06-05 05:56:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:56:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:53,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739910293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:53,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:53,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:56:53,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715825181] [2021-06-05 05:56:53,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:56:53,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:53,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:56:53,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:56:53,777 INFO L87 Difference]: Start difference. First operand 9327 states and 31125 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) [2021-06-05 05:56:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:55,708 INFO L93 Difference]: Finished difference Result 10820 states and 35312 transitions. [2021-06-05 05:56:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:56:55,708 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 [2021-06-05 05:56:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:55,724 INFO L225 Difference]: With dead ends: 10820 [2021-06-05 05:56:55,724 INFO L226 Difference]: Without dead ends: 10712 [2021-06-05 05:56:55,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2235.6ms TimeCoverageRelationStatistics Valid=755, Invalid=3535, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:56:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2021-06-05 05:56:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 9391. [2021-06-05 05:56:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9391 states, 9390 states have (on average 3.3338658146964857) internal successors, (31305), 9390 states have internal predecessors, (31305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9391 states to 9391 states and 31305 transitions. [2021-06-05 05:56:55,907 INFO L78 Accepts]: Start accepts. Automaton has 9391 states and 31305 transitions. Word has length 36 [2021-06-05 05:56:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:55,907 INFO L482 AbstractCegarLoop]: Abstraction has 9391 states and 31305 transitions. [2021-06-05 05:56:55,907 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) [2021-06-05 05:56:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9391 states and 31305 transitions. [2021-06-05 05:56:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:56:55,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:55,919 INFO L521 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] [2021-06-05 05:56:56,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 05:56:56,119 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1212016539, now seen corresponding path program 62 times [2021-06-05 05:56:56,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:56,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719531160] [2021-06-05 05:56:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:56,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:56,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719531160] [2021-06-05 05:56:56,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719531160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:56,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979002000] [2021-06-05 05:56:56,465 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 [2021-06-05 05:56:56,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:56,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:56:56,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979002000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:57,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:57,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 05:56:57,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990145667] [2021-06-05 05:56:57,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:56:57,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:56:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:56:57,251 INFO L87 Difference]: Start difference. First operand 9391 states and 31305 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) [2021-06-05 05:57:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:01,558 INFO L93 Difference]: Finished difference Result 15459 states and 49301 transitions. [2021-06-05 05:57:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:57:01,558 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 [2021-06-05 05:57:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:01,581 INFO L225 Difference]: With dead ends: 15459 [2021-06-05 05:57:01,581 INFO L226 Difference]: Without dead ends: 15318 [2021-06-05 05:57:01,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 3477.9ms TimeCoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:57:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15318 states. [2021-06-05 05:57:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15318 to 9405. [2021-06-05 05:57:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9405 states, 9404 states have (on average 3.336771586558911) internal successors, (31379), 9404 states have internal predecessors, (31379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9405 states to 9405 states and 31379 transitions. [2021-06-05 05:57:01,754 INFO L78 Accepts]: Start accepts. Automaton has 9405 states and 31379 transitions. Word has length 36 [2021-06-05 05:57:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:01,754 INFO L482 AbstractCegarLoop]: Abstraction has 9405 states and 31379 transitions. [2021-06-05 05:57:01,754 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) [2021-06-05 05:57:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9405 states and 31379 transitions. [2021-06-05 05:57:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:01,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:01,765 INFO L521 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] [2021-06-05 05:57:01,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 05:57:01,966 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1194156385, now seen corresponding path program 63 times [2021-06-05 05:57:01,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:01,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714919088] [2021-06-05 05:57:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:02,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714919088] [2021-06-05 05:57:02,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714919088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:02,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578202468] [2021-06-05 05:57:02,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:02,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:57:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:57:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:03,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578202468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:03,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:03,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:57:03,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231958019] [2021-06-05 05:57:03,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:57:03,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:57:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:57:03,045 INFO L87 Difference]: Start difference. First operand 9405 states and 31379 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) [2021-06-05 05:57:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:06,664 INFO L93 Difference]: Finished difference Result 15173 states and 48503 transitions. [2021-06-05 05:57:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:57:06,664 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 [2021-06-05 05:57:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:06,686 INFO L225 Difference]: With dead ends: 15173 [2021-06-05 05:57:06,686 INFO L226 Difference]: Without dead ends: 15059 [2021-06-05 05:57:06,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2720.8ms TimeCoverageRelationStatistics Valid=822, Invalid=5184, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:57:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15059 states. [2021-06-05 05:57:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15059 to 9471. [2021-06-05 05:57:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9471 states, 9470 states have (on average 3.3367476240760294) internal successors, (31599), 9470 states have internal predecessors, (31599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9471 states to 9471 states and 31599 transitions. [2021-06-05 05:57:06,866 INFO L78 Accepts]: Start accepts. Automaton has 9471 states and 31599 transitions. Word has length 36 [2021-06-05 05:57:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:06,866 INFO L482 AbstractCegarLoop]: Abstraction has 9471 states and 31599 transitions. [2021-06-05 05:57:06,867 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) [2021-06-05 05:57:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9471 states and 31599 transitions. [2021-06-05 05:57:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:06,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:06,878 INFO L521 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] [2021-06-05 05:57:07,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:07,079 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:07,079 INFO L82 PathProgramCache]: Analyzing trace with hash 359968101, now seen corresponding path program 64 times [2021-06-05 05:57:07,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:07,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288260782] [2021-06-05 05:57:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:07,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:07,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288260782] [2021-06-05 05:57:07,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288260782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:07,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497873301] [2021-06-05 05:57:07,366 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 [2021-06-05 05:57:07,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:57:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497873301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:08,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:08,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:57:08,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445526613] [2021-06-05 05:57:08,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:57:08,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:57:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:57:08,039 INFO L87 Difference]: Start difference. First operand 9471 states and 31599 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) [2021-06-05 05:57:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:11,610 INFO L93 Difference]: Finished difference Result 16347 states and 51964 transitions. [2021-06-05 05:57:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:57:11,611 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 [2021-06-05 05:57:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:11,634 INFO L225 Difference]: With dead ends: 16347 [2021-06-05 05:57:11,634 INFO L226 Difference]: Without dead ends: 16075 [2021-06-05 05:57:11,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2910.8ms TimeCoverageRelationStatistics Valid=1131, Invalid=6879, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:57:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16075 states. [2021-06-05 05:57:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16075 to 9481. [2021-06-05 05:57:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9481 states, 9480 states have (on average 3.334704641350211) internal successors, (31613), 9480 states have internal predecessors, (31613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 31613 transitions. [2021-06-05 05:57:11,825 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 31613 transitions. Word has length 36 [2021-06-05 05:57:11,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:11,826 INFO L482 AbstractCegarLoop]: Abstraction has 9481 states and 31613 transitions. [2021-06-05 05:57:11,826 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) [2021-06-05 05:57:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 31613 transitions. [2021-06-05 05:57:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:11,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:11,837 INFO L521 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] [2021-06-05 05:57:12,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:12,038 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:12,038 INFO L82 PathProgramCache]: Analyzing trace with hash 663543393, now seen corresponding path program 65 times [2021-06-05 05:57:12,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:12,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20424829] [2021-06-05 05:57:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:12,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20424829] [2021-06-05 05:57:12,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20424829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138146137] [2021-06-05 05:57:12,314 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 [2021-06-05 05:57:12,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:57:12,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:57:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:13,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138146137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:13,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:13,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:57:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091974608] [2021-06-05 05:57:13,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:57:13,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:57:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:57:13,006 INFO L87 Difference]: Start difference. First operand 9481 states and 31613 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) [2021-06-05 05:57:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:17,361 INFO L93 Difference]: Finished difference Result 17046 states and 54034 transitions. [2021-06-05 05:57:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 05:57:17,362 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 [2021-06-05 05:57:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:17,387 INFO L225 Difference]: With dead ends: 17046 [2021-06-05 05:57:17,387 INFO L226 Difference]: Without dead ends: 16798 [2021-06-05 05:57:17,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 3495.3ms TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 05:57:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-05 05:57:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 9516. [2021-06-05 05:57:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.333893851812927) internal successors, (31722), 9515 states have internal predecessors, (31722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 31722 transitions. [2021-06-05 05:57:17,585 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 31722 transitions. Word has length 36 [2021-06-05 05:57:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:17,585 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 31722 transitions. [2021-06-05 05:57:17,586 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) [2021-06-05 05:57:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 31722 transitions. [2021-06-05 05:57:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:17,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:17,597 INFO L521 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] [2021-06-05 05:57:17,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 05:57:17,798 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:17,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1447477403, now seen corresponding path program 66 times [2021-06-05 05:57:17,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:17,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83908710] [2021-06-05 05:57:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:18,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83908710] [2021-06-05 05:57:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83908710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152371249] [2021-06-05 05:57:18,115 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 [2021-06-05 05:57:18,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:57:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:57:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:18,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152371249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:18,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:18,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 05:57:18,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473438784] [2021-06-05 05:57:18,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:57:18,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:57:18,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:57:18,744 INFO L87 Difference]: Start difference. First operand 9516 states and 31722 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) [2021-06-05 05:57:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:25,207 INFO L93 Difference]: Finished difference Result 18367 states and 57873 transitions. [2021-06-05 05:57:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 05:57:25,207 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 [2021-06-05 05:57:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:25,234 INFO L225 Difference]: With dead ends: 18367 [2021-06-05 05:57:25,234 INFO L226 Difference]: Without dead ends: 18184 [2021-06-05 05:57:25,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4588 ImplicationChecksByTransitivity, 4730.2ms TimeCoverageRelationStatistics Valid=1975, Invalid=11597, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 05:57:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2021-06-05 05:57:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 9510. [2021-06-05 05:57:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.3346303501945527) internal successors, (31709), 9509 states have internal predecessors, (31709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31709 transitions. [2021-06-05 05:57:25,455 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31709 transitions. Word has length 36 [2021-06-05 05:57:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:25,456 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31709 transitions. [2021-06-05 05:57:25,456 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) [2021-06-05 05:57:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31709 transitions. [2021-06-05 05:57:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:25,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:25,467 INFO L521 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] [2021-06-05 05:57:25,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 05:57:25,668 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash -556327835, now seen corresponding path program 67 times [2021-06-05 05:57:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:25,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115375584] [2021-06-05 05:57:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:25,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115375584] [2021-06-05 05:57:25,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115375584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615383410] [2021-06-05 05:57:25,926 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:57:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:26,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615383410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:26,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:26,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:57:26,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575774944] [2021-06-05 05:57:26,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:26,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:26,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:26,635 INFO L87 Difference]: Start difference. First operand 9510 states and 31709 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) [2021-06-05 05:57:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:28,644 INFO L93 Difference]: Finished difference Result 13786 states and 44215 transitions. [2021-06-05 05:57:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:57:28,645 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 [2021-06-05 05:57:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:28,667 INFO L225 Difference]: With dead ends: 13786 [2021-06-05 05:57:28,667 INFO L226 Difference]: Without dead ends: 13622 [2021-06-05 05:57:28,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1998.4ms TimeCoverageRelationStatistics Valid=755, Invalid=3801, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:57:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-05 05:57:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 9502. [2021-06-05 05:57:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.335333122829176) internal successors, (31689), 9501 states have internal predecessors, (31689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 31689 transitions. [2021-06-05 05:57:28,845 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 31689 transitions. Word has length 36 [2021-06-05 05:57:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:28,845 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 31689 transitions. [2021-06-05 05:57:28,845 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) [2021-06-05 05:57:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 31689 transitions. [2021-06-05 05:57:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:28,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:28,857 INFO L521 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] [2021-06-05 05:57:29,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:29,065 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:29,066 INFO L82 PathProgramCache]: Analyzing trace with hash -684298399, now seen corresponding path program 68 times [2021-06-05 05:57:29,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:29,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982764900] [2021-06-05 05:57:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:29,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:29,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982764900] [2021-06-05 05:57:29,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982764900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:29,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737650973] [2021-06-05 05:57:29,380 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 [2021-06-05 05:57:29,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:57:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:30,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737650973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:30,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:30,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 05:57:30,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821389700] [2021-06-05 05:57:30,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:57:30,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:30,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:57:30,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:57:30,009 INFO L87 Difference]: Start difference. First operand 9502 states and 31689 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) [2021-06-05 05:57:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:35,345 INFO L93 Difference]: Finished difference Result 14876 states and 47515 transitions. [2021-06-05 05:57:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 05:57:35,346 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 [2021-06-05 05:57:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:35,369 INFO L225 Difference]: With dead ends: 14876 [2021-06-05 05:57:35,369 INFO L226 Difference]: Without dead ends: 14655 [2021-06-05 05:57:35,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 3828.9ms TimeCoverageRelationStatistics Valid=1075, Invalid=8627, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 05:57:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2021-06-05 05:57:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 9510. [2021-06-05 05:57:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.338416237248922) internal successors, (31745), 9509 states have internal predecessors, (31745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31745 transitions. [2021-06-05 05:57:35,551 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31745 transitions. Word has length 36 [2021-06-05 05:57:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:35,552 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31745 transitions. [2021-06-05 05:57:35,552 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) [2021-06-05 05:57:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31745 transitions. [2021-06-05 05:57:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:35,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:35,563 INFO L521 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] [2021-06-05 05:57:35,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 05:57:35,764 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2051584159, now seen corresponding path program 69 times [2021-06-05 05:57:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:35,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859240361] [2021-06-05 05:57:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:36,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:36,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859240361] [2021-06-05 05:57:36,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859240361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:36,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505553964] [2021-06-05 05:57:36,183 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 [2021-06-05 05:57:36,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:57:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:57:36,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:36,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505553964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:36,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:36,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:57:36,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726638283] [2021-06-05 05:57:36,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:57:36,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:36,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:57:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:57:36,859 INFO L87 Difference]: Start difference. First operand 9510 states and 31745 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) [2021-06-05 05:57:40,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:40,439 INFO L93 Difference]: Finished difference Result 16123 states and 51334 transitions. [2021-06-05 05:57:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:57:40,440 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 [2021-06-05 05:57:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:40,460 INFO L225 Difference]: With dead ends: 16123 [2021-06-05 05:57:40,461 INFO L226 Difference]: Without dead ends: 16003 [2021-06-05 05:57:40,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2987.3ms TimeCoverageRelationStatistics Valid=1070, Invalid=5410, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:57:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16003 states. [2021-06-05 05:57:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16003 to 9524. [2021-06-05 05:57:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-06-05 05:57:40,628 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-06-05 05:57:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:40,628 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-06-05 05:57:40,628 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) [2021-06-05 05:57:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-06-05 05:57:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:40,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:40,639 INFO L521 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] [2021-06-05 05:57:40,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:40,839 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:40,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1744269983, now seen corresponding path program 70 times [2021-06-05 05:57:40,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:40,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278746750] [2021-06-05 05:57:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:57:41,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:41,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278746750] [2021-06-05 05:57:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278746750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:41,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483167651] [2021-06-05 05:57:41,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:41,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:41,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:57:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:41,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483167651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:41,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:41,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:57:41,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647401940] [2021-06-05 05:57:41,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:41,770 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 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) [2021-06-05 05:57:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:46,798 INFO L93 Difference]: Finished difference Result 18630 states and 58802 transitions. [2021-06-05 05:57:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 05:57:46,799 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 [2021-06-05 05:57:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:46,824 INFO L225 Difference]: With dead ends: 18630 [2021-06-05 05:57:46,825 INFO L226 Difference]: Without dead ends: 18458 [2021-06-05 05:57:46,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 3745.3ms TimeCoverageRelationStatistics Valid=1708, Invalid=8392, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 05:57:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2021-06-05 05:57:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 9524. [2021-06-05 05:57:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-06-05 05:57:47,068 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-06-05 05:57:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:47,068 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-06-05 05:57:47,068 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) [2021-06-05 05:57:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-06-05 05:57:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:47,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:47,079 INFO L521 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] [2021-06-05 05:57:47,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 05:57:47,281 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1544243469, now seen corresponding path program 71 times [2021-06-05 05:57:47,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:47,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477959210] [2021-06-05 05:57:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:47,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477959210] [2021-06-05 05:57:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477959210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539336983] [2021-06-05 05:57:47,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:47,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:57:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:57:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:48,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539336983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:48,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:48,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:57:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309971988] [2021-06-05 05:57:48,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:57:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:57:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:57:48,531 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 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) [2021-06-05 05:57:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:49,741 INFO L93 Difference]: Finished difference Result 10252 states and 33744 transitions. [2021-06-05 05:57:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:57:49,742 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 [2021-06-05 05:57:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:49,758 INFO L225 Difference]: With dead ends: 10252 [2021-06-05 05:57:49,758 INFO L226 Difference]: Without dead ends: 10198 [2021-06-05 05:57:49,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1583.2ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:57:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-06-05 05:57:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9524. [2021-06-05 05:57:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3421190801218104) internal successors, (31827), 9523 states have internal predecessors, (31827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31827 transitions. [2021-06-05 05:57:49,917 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31827 transitions. Word has length 36 [2021-06-05 05:57:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:49,917 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31827 transitions. [2021-06-05 05:57:49,917 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) [2021-06-05 05:57:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31827 transitions. [2021-06-05 05:57:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:49,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:49,929 INFO L521 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] [2021-06-05 05:57:50,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 05:57:50,129 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:50,130 INFO L82 PathProgramCache]: Analyzing trace with hash -354285555, now seen corresponding path program 72 times [2021-06-05 05:57:50,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:50,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080353459] [2021-06-05 05:57:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:50,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:50,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080353459] [2021-06-05 05:57:50,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080353459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:50,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428432220] [2021-06-05 05:57:50,475 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 [2021-06-05 05:57:50,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:57:50,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:57:50,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:51,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428432220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:51,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:51,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:57:51,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462618302] [2021-06-05 05:57:51,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:57:51,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:57:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:57:51,171 INFO L87 Difference]: Start difference. First operand 9524 states and 31827 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) [2021-06-05 05:57:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:53,064 INFO L93 Difference]: Finished difference Result 10196 states and 33634 transitions. [2021-06-05 05:57:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:57:53,065 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 [2021-06-05 05:57:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:53,081 INFO L225 Difference]: With dead ends: 10196 [2021-06-05 05:57:53,081 INFO L226 Difference]: Without dead ends: 10082 [2021-06-05 05:57:53,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1601.4ms TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:57:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10082 states. [2021-06-05 05:57:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10082 to 9560. [2021-06-05 05:57:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 3.340830630819123) internal successors, (31935), 9559 states have internal predecessors, (31935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 31935 transitions. [2021-06-05 05:57:53,267 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 31935 transitions. Word has length 36 [2021-06-05 05:57:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:53,268 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 31935 transitions. [2021-06-05 05:57:53,268 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) [2021-06-05 05:57:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 31935 transitions. [2021-06-05 05:57:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:53,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:53,279 INFO L521 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] [2021-06-05 05:57:53,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:53,479 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1192212723, now seen corresponding path program 73 times [2021-06-05 05:57:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:53,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351184703] [2021-06-05 05:57:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:53,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:53,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351184703] [2021-06-05 05:57:53,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351184703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:53,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766807704] [2021-06-05 05:57:53,736 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 [2021-06-05 05:57:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:57:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:54,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766807704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:54,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:54,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:57:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299285693] [2021-06-05 05:57:54,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:54,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:54,430 INFO L87 Difference]: Start difference. First operand 9560 states and 31935 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) [2021-06-05 05:57:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:55,988 INFO L93 Difference]: Finished difference Result 10336 states and 34015 transitions. [2021-06-05 05:57:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:57:55,988 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 [2021-06-05 05:57:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:56,004 INFO L225 Difference]: With dead ends: 10336 [2021-06-05 05:57:56,004 INFO L226 Difference]: Without dead ends: 10156 [2021-06-05 05:57:56,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1512.3ms TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:57:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2021-06-05 05:57:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 9528. [2021-06-05 05:57:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 3.3432350162695497) internal successors, (31851), 9527 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) [2021-06-05 05:57:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 31851 transitions. [2021-06-05 05:57:56,154 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 31851 transitions. Word has length 36 [2021-06-05 05:57:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:56,154 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 31851 transitions. [2021-06-05 05:57:56,155 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) [2021-06-05 05:57:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 31851 transitions. [2021-06-05 05:57:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:57:56,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:56,166 INFO L521 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] [2021-06-05 05:57:56,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:56,366 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:56,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1547403025, now seen corresponding path program 74 times [2021-06-05 05:57:56,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:56,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199161203] [2021-06-05 05:57:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:56,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:56,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199161203] [2021-06-05 05:57:56,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199161203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:56,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042504483] [2021-06-05 05:57:56,744 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 [2021-06-05 05:57:56,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:56,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:57:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:57,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042504483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:57,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:57,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 05:57:57,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519949784] [2021-06-05 05:57:57,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:57:57,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:57:57,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:57:57,609 INFO L87 Difference]: Start difference. First operand 9528 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) [2021-06-05 05:58:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:01,244 INFO L93 Difference]: Finished difference Result 13472 states and 43399 transitions. [2021-06-05 05:58:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:58:01,244 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 [2021-06-05 05:58:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:01,265 INFO L225 Difference]: With dead ends: 13472 [2021-06-05 05:58:01,265 INFO L226 Difference]: Without dead ends: 13358 [2021-06-05 05:58:01,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 2920.6ms TimeCoverageRelationStatistics Valid=799, Invalid=5207, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:58:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13358 states. [2021-06-05 05:58:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13358 to 9512. [2021-06-05 05:58:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.344232993376091) internal successors, (31807), 9511 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 31807 transitions. [2021-06-05 05:58:01,449 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 31807 transitions. Word has length 36 [2021-06-05 05:58:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:01,449 INFO L482 AbstractCegarLoop]: Abstraction has 9512 states and 31807 transitions. [2021-06-05 05:58:01,449 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) [2021-06-05 05:58:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 31807 transitions. [2021-06-05 05:58:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:01,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:01,512 INFO L521 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] [2021-06-05 05:58:01,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:01,712 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1312007693, now seen corresponding path program 75 times [2021-06-05 05:58:01,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:01,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249139257] [2021-06-05 05:58:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:02,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249139257] [2021-06-05 05:58:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249139257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000881606] [2021-06-05 05:58:02,182 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 [2021-06-05 05:58:02,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:58:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:58:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:02,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000881606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:02,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:02,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-06-05 05:58:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374679071] [2021-06-05 05:58:02,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:02,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:02,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:02,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:02,941 INFO L87 Difference]: Start difference. First operand 9512 states and 31807 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) [2021-06-05 05:58:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:07,311 INFO L93 Difference]: Finished difference Result 16362 states and 52136 transitions. [2021-06-05 05:58:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 05:58:07,312 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 [2021-06-05 05:58:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:07,336 INFO L225 Difference]: With dead ends: 16362 [2021-06-05 05:58:07,337 INFO L226 Difference]: Without dead ends: 16221 [2021-06-05 05:58:07,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 3719.2ms TimeCoverageRelationStatistics Valid=1441, Invalid=7489, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:58:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-05 05:58:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 9564. [2021-06-05 05:58:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9563 states have (on average 3.3460211230785317) internal successors, (31998), 9563 states have internal predecessors, (31998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 31998 transitions. [2021-06-05 05:58:07,516 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 31998 transitions. Word has length 36 [2021-06-05 05:58:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:07,516 INFO L482 AbstractCegarLoop]: Abstraction has 9564 states and 31998 transitions. [2021-06-05 05:58:07,516 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) [2021-06-05 05:58:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 31998 transitions. [2021-06-05 05:58:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:07,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:07,527 INFO L521 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] [2021-06-05 05:58:07,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 05:58:07,728 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 776721425, now seen corresponding path program 76 times [2021-06-05 05:58:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302589772] [2021-06-05 05:58:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:07,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:07,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302589772] [2021-06-05 05:58:07,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302589772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:07,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058094837] [2021-06-05 05:58:07,997 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 [2021-06-05 05:58:08,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:08,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:08,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:58:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058094837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:08,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:08,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:58:08,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874725864] [2021-06-05 05:58:08,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:58:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:58:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:58:08,689 INFO L87 Difference]: Start difference. First operand 9564 states and 31998 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) [2021-06-05 05:58:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:10,966 INFO L93 Difference]: Finished difference Result 14020 states and 45032 transitions. [2021-06-05 05:58:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:58:10,966 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 [2021-06-05 05:58:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:10,987 INFO L225 Difference]: With dead ends: 14020 [2021-06-05 05:58:10,987 INFO L226 Difference]: Without dead ends: 13808 [2021-06-05 05:58:10,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 2121.7ms TimeCoverageRelationStatistics Valid=736, Invalid=4520, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:58:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13808 states. [2021-06-05 05:58:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13808 to 9532. [2021-06-05 05:58:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 3.348861609484839) internal successors, (31918), 9531 states have internal predecessors, (31918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 31918 transitions. [2021-06-05 05:58:11,170 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 31918 transitions. Word has length 36 [2021-06-05 05:58:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:11,170 INFO L482 AbstractCegarLoop]: Abstraction has 9532 states and 31918 transitions. [2021-06-05 05:58:11,170 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) [2021-06-05 05:58:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 31918 transitions. [2021-06-05 05:58:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:11,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:11,182 INFO L521 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] [2021-06-05 05:58:11,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 05:58:11,383 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash 454800909, now seen corresponding path program 77 times [2021-06-05 05:58:11,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:11,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048681969] [2021-06-05 05:58:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:11,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048681969] [2021-06-05 05:58:11,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048681969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866824728] [2021-06-05 05:58:11,652 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 [2021-06-05 05:58:11,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:58:11,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:58:11,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:12,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866824728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:12,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:12,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:58:12,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985186168] [2021-06-05 05:58:12,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:58:12,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:12,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:58:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:58:12,323 INFO L87 Difference]: Start difference. First operand 9532 states and 31918 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) [2021-06-05 05:58:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:15,087 INFO L93 Difference]: Finished difference Result 14454 states and 46414 transitions. [2021-06-05 05:58:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:58:15,087 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 [2021-06-05 05:58:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:15,111 INFO L225 Difference]: With dead ends: 14454 [2021-06-05 05:58:15,111 INFO L226 Difference]: Without dead ends: 14270 [2021-06-05 05:58:15,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 2355.2ms TimeCoverageRelationStatistics Valid=874, Invalid=5288, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:58:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2021-06-05 05:58:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 9504. [2021-06-05 05:58:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9504 states, 9503 states have (on average 3.351994107124066) internal successors, (31854), 9503 states have internal predecessors, (31854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9504 states to 9504 states and 31854 transitions. [2021-06-05 05:58:15,299 INFO L78 Accepts]: Start accepts. Automaton has 9504 states and 31854 transitions. Word has length 36 [2021-06-05 05:58:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:15,300 INFO L482 AbstractCegarLoop]: Abstraction has 9504 states and 31854 transitions. [2021-06-05 05:58:15,300 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) [2021-06-05 05:58:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 9504 states and 31854 transitions. [2021-06-05 05:58:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:15,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:15,312 INFO L521 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] [2021-06-05 05:58:15,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:15,512 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1194222865, now seen corresponding path program 78 times [2021-06-05 05:58:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:15,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095343622] [2021-06-05 05:58:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:15,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095343622] [2021-06-05 05:58:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095343622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608058461] [2021-06-05 05:58:15,780 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 [2021-06-05 05:58:15,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:58:15,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:58:15,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:16,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608058461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:16,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:16,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 05:58:16,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106790282] [2021-06-05 05:58:16,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:16,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:16,396 INFO L87 Difference]: Start difference. First operand 9504 states and 31854 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) [2021-06-05 05:58:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:21,764 INFO L93 Difference]: Finished difference Result 16078 states and 51312 transitions. [2021-06-05 05:58:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:58:21,765 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 [2021-06-05 05:58:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:21,791 INFO L225 Difference]: With dead ends: 16078 [2021-06-05 05:58:21,791 INFO L226 Difference]: Without dead ends: 15779 [2021-06-05 05:58:21,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 3983.4ms TimeCoverageRelationStatistics Valid=1235, Invalid=10537, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:58:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15779 states. [2021-06-05 05:58:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15779 to 9476. [2021-06-05 05:58:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.35155672823219) internal successors, (31756), 9475 states have internal predecessors, (31756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31756 transitions. [2021-06-05 05:58:21,996 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31756 transitions. Word has length 36 [2021-06-05 05:58:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:21,996 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31756 transitions. [2021-06-05 05:58:21,997 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) [2021-06-05 05:58:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31756 transitions. [2021-06-05 05:58:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:22,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:22,008 INFO L521 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] [2021-06-05 05:58:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-05 05:58:22,209 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2099893235, now seen corresponding path program 79 times [2021-06-05 05:58:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996674119] [2021-06-05 05:58:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:22,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:22,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996674119] [2021-06-05 05:58:22,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996674119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:22,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384169552] [2021-06-05 05:58:22,531 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 [2021-06-05 05:58:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:58:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:23,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384169552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:23,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:23,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-06-05 05:58:23,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075986465] [2021-06-05 05:58:23,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:58:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:58:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:58:23,243 INFO L87 Difference]: Start difference. First operand 9476 states and 31756 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) [2021-06-05 05:58:27,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:27,690 INFO L93 Difference]: Finished difference Result 16847 states and 53541 transitions. [2021-06-05 05:58:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 05:58:27,690 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 [2021-06-05 05:58:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:27,715 INFO L225 Difference]: With dead ends: 16847 [2021-06-05 05:58:27,716 INFO L226 Difference]: Without dead ends: 16599 [2021-06-05 05:58:27,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 3469.4ms TimeCoverageRelationStatistics Valid=1311, Invalid=8789, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 05:58:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16599 states. [2021-06-05 05:58:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16599 to 9476. [2021-06-05 05:58:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.350817941952507) internal successors, (31749), 9475 states have internal predecessors, (31749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31749 transitions. [2021-06-05 05:58:27,919 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31749 transitions. Word has length 36 [2021-06-05 05:58:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:27,919 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31749 transitions. [2021-06-05 05:58:27,919 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) [2021-06-05 05:58:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31749 transitions. [2021-06-05 05:58:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:27,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:27,931 INFO L521 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] [2021-06-05 05:58:28,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 05:58:28,132 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash 84053265, now seen corresponding path program 80 times [2021-06-05 05:58:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:28,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443840827] [2021-06-05 05:58:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:28,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:28,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443840827] [2021-06-05 05:58:28,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443840827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:28,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811935213] [2021-06-05 05:58:28,469 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 [2021-06-05 05:58:28,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:28,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:28,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:58:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:29,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811935213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:29,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:29,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 05:58:29,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321332375] [2021-06-05 05:58:29,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:29,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:29,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:29,112 INFO L87 Difference]: Start difference. First operand 9476 states and 31749 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) [2021-06-05 05:58:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:35,527 INFO L93 Difference]: Finished difference Result 18120 states and 57307 transitions. [2021-06-05 05:58:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 05:58:35,528 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 [2021-06-05 05:58:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:35,554 INFO L225 Difference]: With dead ends: 18120 [2021-06-05 05:58:35,554 INFO L226 Difference]: Without dead ends: 17937 [2021-06-05 05:58:35,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 4853.9ms TimeCoverageRelationStatistics Valid=1926, Invalid=11880, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 05:58:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17937 states. [2021-06-05 05:58:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17937 to 9447. [2021-06-05 05:58:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 3.34977768367563) internal successors, (31642), 9446 states have internal predecessors, (31642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 31642 transitions. [2021-06-05 05:58:35,765 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 31642 transitions. Word has length 36 [2021-06-05 05:58:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:35,765 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 31642 transitions. [2021-06-05 05:58:35,765 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) [2021-06-05 05:58:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 31642 transitions. [2021-06-05 05:58:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:35,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:35,776 INFO L521 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] [2021-06-05 05:58:35,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:35,988 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash -859968943, now seen corresponding path program 81 times [2021-06-05 05:58:35,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:35,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786565587] [2021-06-05 05:58:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:36,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:36,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786565587] [2021-06-05 05:58:36,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786565587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:36,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926574699] [2021-06-05 05:58:36,383 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 [2021-06-05 05:58:36,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:58:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:36,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:58:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:37,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926574699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:37,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:37,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 05:58:37,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837244061] [2021-06-05 05:58:37,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:58:37,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:58:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:58:37,199 INFO L87 Difference]: Start difference. First operand 9447 states and 31642 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) [2021-06-05 05:58:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:41,182 INFO L93 Difference]: Finished difference Result 18867 states and 60832 transitions. [2021-06-05 05:58:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:58:41,183 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 [2021-06-05 05:58:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:41,213 INFO L225 Difference]: With dead ends: 18867 [2021-06-05 05:58:41,214 INFO L226 Difference]: Without dead ends: 18741 [2021-06-05 05:58:41,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 3509.1ms TimeCoverageRelationStatistics Valid=1200, Invalid=6632, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:58:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18741 states. [2021-06-05 05:58:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18741 to 9611. [2021-06-05 05:58:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9610 states have (on average 3.3521331945889696) internal successors, (32214), 9610 states have internal predecessors, (32214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 32214 transitions. [2021-06-05 05:58:41,509 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 32214 transitions. Word has length 36 [2021-06-05 05:58:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:41,509 INFO L482 AbstractCegarLoop]: Abstraction has 9611 states and 32214 transitions. [2021-06-05 05:58:41,509 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) [2021-06-05 05:58:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 32214 transitions. [2021-06-05 05:58:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:41,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:41,520 INFO L521 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] [2021-06-05 05:58:41,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 05:58:41,721 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1227510575, now seen corresponding path program 82 times [2021-06-05 05:58:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:41,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198476659] [2021-06-05 05:58:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:42,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:42,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198476659] [2021-06-05 05:58:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198476659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:42,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466952156] [2021-06-05 05:58:42,083 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 [2021-06-05 05:58:42,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:58:42,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:42,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466952156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:42,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:42,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:58:42,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92191438] [2021-06-05 05:58:42,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:42,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:42,922 INFO L87 Difference]: Start difference. First operand 9611 states and 32214 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) [2021-06-05 05:58:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:44,446 INFO L93 Difference]: Finished difference Result 12393 states and 40388 transitions. [2021-06-05 05:58:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:58:44,447 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 [2021-06-05 05:58:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:44,469 INFO L225 Difference]: With dead ends: 12393 [2021-06-05 05:58:44,469 INFO L226 Difference]: Without dead ends: 12305 [2021-06-05 05:58:44,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1822.4ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:58:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-06-05 05:58:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 9755. [2021-06-05 05:58:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9755 states, 9754 states have (on average 3.352778347344679) internal successors, (32703), 9754 states have internal predecessors, (32703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9755 states to 9755 states and 32703 transitions. [2021-06-05 05:58:44,643 INFO L78 Accepts]: Start accepts. Automaton has 9755 states and 32703 transitions. Word has length 36 [2021-06-05 05:58:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:44,643 INFO L482 AbstractCegarLoop]: Abstraction has 9755 states and 32703 transitions. [2021-06-05 05:58:44,643 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) [2021-06-05 05:58:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9755 states and 32703 transitions. [2021-06-05 05:58:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:44,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:44,655 INFO L521 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] [2021-06-05 05:58:44,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 05:58:44,856 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1040210897, now seen corresponding path program 83 times [2021-06-05 05:58:44,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:44,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138587704] [2021-06-05 05:58:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:45,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:45,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138587704] [2021-06-05 05:58:45,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138587704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:45,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182889730] [2021-06-05 05:58:45,230 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 [2021-06-05 05:58:45,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:58:45,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:58:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:45,759 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 05:58:46,147 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 05:58:46,434 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 05:58:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:46,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182889730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:46,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:46,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 05:58:46,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372938039] [2021-06-05 05:58:46,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:58:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:58:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:58:46,589 INFO L87 Difference]: Start difference. First operand 9755 states and 32703 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) [2021-06-05 05:58:49,368 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 05:58:49,533 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 05:58:49,727 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 05:58:49,979 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 05:58:50,210 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 05:58:50,548 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 05:58:50,991 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 05:58:51,228 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 05:58:51,793 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-06-05 05:58:52,555 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2021-06-05 05:58:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:52,876 INFO L93 Difference]: Finished difference Result 16091 states and 52051 transitions. [2021-06-05 05:58:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:58:52,876 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 [2021-06-05 05:58:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:52,900 INFO L225 Difference]: With dead ends: 16091 [2021-06-05 05:58:52,900 INFO L226 Difference]: Without dead ends: 16002 [2021-06-05 05:58:52,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 6096.1ms TimeCoverageRelationStatistics Valid=1450, Invalid=8056, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 05:58:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16002 states. [2021-06-05 05:58:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16002 to 9791. [2021-06-05 05:58:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9790 states have (on average 3.354749744637385) internal successors, (32843), 9790 states have internal predecessors, (32843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 32843 transitions. [2021-06-05 05:58:53,089 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 32843 transitions. Word has length 36 [2021-06-05 05:58:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:53,089 INFO L482 AbstractCegarLoop]: Abstraction has 9791 states and 32843 transitions. [2021-06-05 05:58:53,090 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) [2021-06-05 05:58:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 32843 transitions. [2021-06-05 05:58:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:53,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:53,101 INFO L521 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] [2021-06-05 05:58:53,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:53,302 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash 562424665, now seen corresponding path program 84 times [2021-06-05 05:58:53,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:53,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567150776] [2021-06-05 05:58:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:53,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:53,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567150776] [2021-06-05 05:58:53,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567150776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:53,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578943719] [2021-06-05 05:58:53,661 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 [2021-06-05 05:58:53,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:58:53,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:58:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:54,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578943719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:54,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:54,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 05:58:54,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201582051] [2021-06-05 05:58:54,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:58:54,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:58:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:58:54,524 INFO L87 Difference]: Start difference. First operand 9791 states and 32843 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) [2021-06-05 05:58:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:56,428 INFO L93 Difference]: Finished difference Result 12226 states and 40208 transitions. [2021-06-05 05:58:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:58:56,428 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 [2021-06-05 05:58:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:56,448 INFO L225 Difference]: With dead ends: 12226 [2021-06-05 05:58:56,448 INFO L226 Difference]: Without dead ends: 12106 [2021-06-05 05:58:56,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1933.0ms TimeCoverageRelationStatistics Valid=568, Invalid=2854, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:58:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2021-06-05 05:58:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 9799. [2021-06-05 05:58:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9799 states, 9798 states have (on average 3.3548683404776485) internal successors, (32871), 9798 states have internal predecessors, (32871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9799 states to 9799 states and 32871 transitions. [2021-06-05 05:58:56,626 INFO L78 Accepts]: Start accepts. Automaton has 9799 states and 32871 transitions. Word has length 36 [2021-06-05 05:58:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:56,627 INFO L482 AbstractCegarLoop]: Abstraction has 9799 states and 32871 transitions. [2021-06-05 05:58:56,627 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) [2021-06-05 05:58:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9799 states and 32871 transitions. [2021-06-05 05:58:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:56,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:56,639 INFO L521 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] [2021-06-05 05:58:56,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:56,840 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:56,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1835358373, now seen corresponding path program 85 times [2021-06-05 05:58:56,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:56,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762345037] [2021-06-05 05:58:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:57,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:57,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762345037] [2021-06-05 05:58:57,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762345037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:57,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677805417] [2021-06-05 05:58:57,187 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 [2021-06-05 05:58:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:57,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:58:57,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:57,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677805417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:57,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:57,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:58:57,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113995012] [2021-06-05 05:58:57,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:58:57,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:57,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:58:57,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:58:57,956 INFO L87 Difference]: Start difference. First operand 9799 states and 32871 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) [2021-06-05 05:58:59,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:59,558 INFO L93 Difference]: Finished difference Result 11929 states and 39454 transitions. [2021-06-05 05:58:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:58:59,558 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 [2021-06-05 05:58:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:59,576 INFO L225 Difference]: With dead ends: 11929 [2021-06-05 05:58:59,576 INFO L226 Difference]: Without dead ends: 11809 [2021-06-05 05:58:59,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1676.4ms TimeCoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:58:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11809 states. [2021-06-05 05:58:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11809 to 9839. [2021-06-05 05:58:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9839 states, 9838 states have (on average 3.3558650132140677) internal successors, (33015), 9838 states have internal predecessors, (33015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 33015 transitions. [2021-06-05 05:58:59,734 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 33015 transitions. Word has length 36 [2021-06-05 05:58:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:59,734 INFO L482 AbstractCegarLoop]: Abstraction has 9839 states and 33015 transitions. [2021-06-05 05:58:59,734 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) [2021-06-05 05:58:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 33015 transitions. [2021-06-05 05:58:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:58:59,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:59,746 INFO L521 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] [2021-06-05 05:58:59,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable702 [2021-06-05 05:58:59,968 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1765248337, now seen corresponding path program 86 times [2021-06-05 05:58:59,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:59,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064452846] [2021-06-05 05:58:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:00,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:00,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064452846] [2021-06-05 05:59:00,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064452846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:00,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870670610] [2021-06-05 05:59:00,319 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 [2021-06-05 05:59:00,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:00,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:59:00,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870670610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:01,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:01,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 05:59:01,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603244642] [2021-06-05 05:59:01,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:59:01,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:59:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:59:01,029 INFO L87 Difference]: Start difference. First operand 9839 states and 33015 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) [2021-06-05 05:59:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:02,523 INFO L93 Difference]: Finished difference Result 11109 states and 36822 transitions. [2021-06-05 05:59:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:59:02,524 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 [2021-06-05 05:59:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:02,541 INFO L225 Difference]: With dead ends: 11109 [2021-06-05 05:59:02,541 INFO L226 Difference]: Without dead ends: 10989 [2021-06-05 05:59:02,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1563.2ms TimeCoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:59:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10989 states. [2021-06-05 05:59:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10989 to 9847. [2021-06-05 05:59:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9847 states, 9846 states have (on average 3.3555758683729433) internal successors, (33039), 9846 states have internal predecessors, (33039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9847 states to 9847 states and 33039 transitions. [2021-06-05 05:59:02,750 INFO L78 Accepts]: Start accepts. Automaton has 9847 states and 33039 transitions. Word has length 36 [2021-06-05 05:59:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:02,750 INFO L482 AbstractCegarLoop]: Abstraction has 9847 states and 33039 transitions. [2021-06-05 05:59:02,750 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) [2021-06-05 05:59:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9847 states and 33039 transitions. [2021-06-05 05:59:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:02,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:02,763 INFO L521 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] [2021-06-05 05:59:02,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:02,964 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1048846579, now seen corresponding path program 87 times [2021-06-05 05:59:02,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:02,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787644952] [2021-06-05 05:59:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:03,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:03,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787644952] [2021-06-05 05:59:03,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787644952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:03,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311631862] [2021-06-05 05:59:03,313 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 [2021-06-05 05:59:03,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:59:03,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:59:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:04,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311631862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:04,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:04,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:59:04,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723697185] [2021-06-05 05:59:04,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:59:04,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:04,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:59:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:59:04,115 INFO L87 Difference]: Start difference. First operand 9847 states and 33039 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) [2021-06-05 05:59:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:06,724 INFO L93 Difference]: Finished difference Result 15253 states and 49125 transitions. [2021-06-05 05:59:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:59:06,725 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 [2021-06-05 05:59:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:06,749 INFO L225 Difference]: With dead ends: 15253 [2021-06-05 05:59:06,749 INFO L226 Difference]: Without dead ends: 15075 [2021-06-05 05:59:06,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2508.6ms TimeCoverageRelationStatistics Valid=993, Invalid=4119, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:59:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15075 states. [2021-06-05 05:59:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15075 to 9913. [2021-06-05 05:59:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9913 states, 9912 states have (on average 3.355730427764326) internal successors, (33262), 9912 states have internal predecessors, (33262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9913 states to 9913 states and 33262 transitions. [2021-06-05 05:59:06,995 INFO L78 Accepts]: Start accepts. Automaton has 9913 states and 33262 transitions. Word has length 36 [2021-06-05 05:59:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:06,995 INFO L482 AbstractCegarLoop]: Abstraction has 9913 states and 33262 transitions. [2021-06-05 05:59:06,995 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) [2021-06-05 05:59:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 9913 states and 33262 transitions. [2021-06-05 05:59:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:07,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:07,007 INFO L521 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] [2021-06-05 05:59:07,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 05:59:07,208 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1426910801, now seen corresponding path program 88 times [2021-06-05 05:59:07,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:07,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452188008] [2021-06-05 05:59:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452188008] [2021-06-05 05:59:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452188008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414607216] [2021-06-05 05:59:07,566 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 [2021-06-05 05:59:07,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:59:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:59:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:08,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414607216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:08,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:08,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 05:59:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717564133] [2021-06-05 05:59:08,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:59:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:59:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:59:08,327 INFO L87 Difference]: Start difference. First operand 9913 states and 33262 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) [2021-06-05 05:59:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:09,782 INFO L93 Difference]: Finished difference Result 11260 states and 37286 transitions. [2021-06-05 05:59:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:59:09,782 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 [2021-06-05 05:59:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:09,800 INFO L225 Difference]: With dead ends: 11260 [2021-06-05 05:59:09,800 INFO L226 Difference]: Without dead ends: 11140 [2021-06-05 05:59:09,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1597.1ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:59:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2021-06-05 05:59:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9907. [2021-06-05 05:59:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9907 states, 9906 states have (on average 3.354936402180497) internal successors, (33234), 9906 states have internal predecessors, (33234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9907 states to 9907 states and 33234 transitions. [2021-06-05 05:59:09,965 INFO L78 Accepts]: Start accepts. Automaton has 9907 states and 33234 transitions. Word has length 36 [2021-06-05 05:59:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:09,965 INFO L482 AbstractCegarLoop]: Abstraction has 9907 states and 33234 transitions. [2021-06-05 05:59:09,965 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) [2021-06-05 05:59:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9907 states and 33234 transitions. [2021-06-05 05:59:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:09,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:09,977 INFO L521 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] [2021-06-05 05:59:10,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-05 05:59:10,177 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash -442588443, now seen corresponding path program 89 times [2021-06-05 05:59:10,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:10,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978549873] [2021-06-05 05:59:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:10,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:10,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978549873] [2021-06-05 05:59:10,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978549873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:10,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593571374] [2021-06-05 05:59:10,524 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 [2021-06-05 05:59:10,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:59:10,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:59:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593571374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:11,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:11,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:59:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596242532] [2021-06-05 05:59:11,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:59:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:59:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:59:11,245 INFO L87 Difference]: Start difference. First operand 9907 states and 33234 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) [2021-06-05 05:59:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:13,235 INFO L93 Difference]: Finished difference Result 12217 states and 40114 transitions. [2021-06-05 05:59:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:59:13,235 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 [2021-06-05 05:59:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:13,253 INFO L225 Difference]: With dead ends: 12217 [2021-06-05 05:59:13,253 INFO L226 Difference]: Without dead ends: 12163 [2021-06-05 05:59:13,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1918.4ms TimeCoverageRelationStatistics Valid=607, Invalid=3175, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:59:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2021-06-05 05:59:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 10085. [2021-06-05 05:59:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10085 states, 10084 states have (on average 3.347084490281634) internal successors, (33752), 10084 states have internal predecessors, (33752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10085 states to 10085 states and 33752 transitions. [2021-06-05 05:59:13,414 INFO L78 Accepts]: Start accepts. Automaton has 10085 states and 33752 transitions. Word has length 36 [2021-06-05 05:59:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:13,414 INFO L482 AbstractCegarLoop]: Abstraction has 10085 states and 33752 transitions. [2021-06-05 05:59:13,414 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) [2021-06-05 05:59:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 10085 states and 33752 transitions. [2021-06-05 05:59:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:13,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:13,425 INFO L521 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] [2021-06-05 05:59:13,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:13,626 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:13,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1280515611, now seen corresponding path program 90 times [2021-06-05 05:59:13,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:13,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981824231] [2021-06-05 05:59:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:13,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981824231] [2021-06-05 05:59:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981824231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326105336] [2021-06-05 05:59:13,878 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 [2021-06-05 05:59:13,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:59:13,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:59:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:14,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326105336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:14,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:14,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 05:59:14,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331015166] [2021-06-05 05:59:14,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:59:14,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:14,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:59:14,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:59:14,465 INFO L87 Difference]: Start difference. First operand 10085 states and 33752 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) [2021-06-05 05:59:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:17,112 INFO L93 Difference]: Finished difference Result 11554 states and 37757 transitions. [2021-06-05 05:59:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:59:17,113 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 [2021-06-05 05:59:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:17,131 INFO L225 Difference]: With dead ends: 11554 [2021-06-05 05:59:17,131 INFO L226 Difference]: Without dead ends: 11311 [2021-06-05 05:59:17,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2054.5ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:59:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2021-06-05 05:59:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 10087. [2021-06-05 05:59:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 3.3471148126115406) internal successors, (33759), 10086 states have internal predecessors, (33759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 33759 transitions. [2021-06-05 05:59:17,307 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 33759 transitions. Word has length 36 [2021-06-05 05:59:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:17,307 INFO L482 AbstractCegarLoop]: Abstraction has 10087 states and 33759 transitions. [2021-06-05 05:59:17,307 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) [2021-06-05 05:59:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 33759 transitions. [2021-06-05 05:59:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:17,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:17,319 INFO L521 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] [2021-06-05 05:59:17,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:17,520 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash -764508959, now seen corresponding path program 91 times [2021-06-05 05:59:17,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:17,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399443919] [2021-06-05 05:59:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:17,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:17,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399443919] [2021-06-05 05:59:17,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399443919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:17,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231499341] [2021-06-05 05:59:17,863 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 [2021-06-05 05:59:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:59:17,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:18,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231499341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:18,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:18,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:59:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105332316] [2021-06-05 05:59:18,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:59:18,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:59:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:59:18,605 INFO L87 Difference]: Start difference. First operand 10087 states and 33759 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) [2021-06-05 05:59:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:20,653 INFO L93 Difference]: Finished difference Result 12818 states and 41972 transitions. [2021-06-05 05:59:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:59:20,654 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 [2021-06-05 05:59:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:20,674 INFO L225 Difference]: With dead ends: 12818 [2021-06-05 05:59:20,674 INFO L226 Difference]: Without dead ends: 12721 [2021-06-05 05:59:20,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1971.0ms TimeCoverageRelationStatistics Valid=643, Invalid=3263, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:59:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12721 states. [2021-06-05 05:59:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12721 to 10131. [2021-06-05 05:59:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10131 states, 10130 states have (on average 3.3490621915103653) internal successors, (33926), 10130 states have internal predecessors, (33926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10131 states to 10131 states and 33926 transitions. [2021-06-05 05:59:20,844 INFO L78 Accepts]: Start accepts. Automaton has 10131 states and 33926 transitions. Word has length 36 [2021-06-05 05:59:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:20,844 INFO L482 AbstractCegarLoop]: Abstraction has 10131 states and 33926 transitions. [2021-06-05 05:59:20,844 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) [2021-06-05 05:59:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10131 states and 33926 transitions. [2021-06-05 05:59:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:20,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:20,856 INFO L521 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] [2021-06-05 05:59:21,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 05:59:21,056 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2014469349, now seen corresponding path program 92 times [2021-06-05 05:59:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248275829] [2021-06-05 05:59:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:21,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:21,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248275829] [2021-06-05 05:59:21,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248275829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:21,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419894789] [2021-06-05 05:59:21,452 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:21,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:59:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:22,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419894789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:22,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:22,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:59:22,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169042983] [2021-06-05 05:59:22,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:59:22,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:59:22,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:59:22,120 INFO L87 Difference]: Start difference. First operand 10131 states and 33926 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) [2021-06-05 05:59:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:25,679 INFO L93 Difference]: Finished difference Result 16789 states and 53924 transitions. [2021-06-05 05:59:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:59:25,679 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 [2021-06-05 05:59:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:25,704 INFO L225 Difference]: With dead ends: 16789 [2021-06-05 05:59:25,705 INFO L226 Difference]: Without dead ends: 16675 [2021-06-05 05:59:25,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 3092.2ms TimeCoverageRelationStatistics Valid=1240, Invalid=5566, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:59:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16675 states. [2021-06-05 05:59:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16675 to 10145. [2021-06-05 05:59:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.3501577287066246) internal successors, (33984), 10144 states have internal predecessors, (33984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 33984 transitions. [2021-06-05 05:59:25,898 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 33984 transitions. Word has length 36 [2021-06-05 05:59:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:25,898 INFO L482 AbstractCegarLoop]: Abstraction has 10145 states and 33984 transitions. [2021-06-05 05:59:25,898 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) [2021-06-05 05:59:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 33984 transitions. [2021-06-05 05:59:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:25,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:25,910 INFO L521 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] [2021-06-05 05:59:26,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-05 05:59:26,110 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:26,111 INFO L82 PathProgramCache]: Analyzing trace with hash -165738267, now seen corresponding path program 93 times [2021-06-05 05:59:26,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:26,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616097672] [2021-06-05 05:59:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:26,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616097672] [2021-06-05 05:59:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616097672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978849526] [2021-06-05 05:59:26,423 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 [2021-06-05 05:59:26,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:59:26,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:59:26,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:27,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978849526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:27,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:27,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-06-05 05:59:27,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675802271] [2021-06-05 05:59:27,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:27,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:27,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:27,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:27,076 INFO L87 Difference]: Start difference. First operand 10145 states and 33984 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) [2021-06-05 05:59:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:32,871 INFO L93 Difference]: Finished difference Result 15370 states and 49391 transitions. [2021-06-05 05:59:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:59:32,872 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 [2021-06-05 05:59:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:32,895 INFO L225 Difference]: With dead ends: 15370 [2021-06-05 05:59:32,895 INFO L226 Difference]: Without dead ends: 15103 [2021-06-05 05:59:32,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 4068.7ms TimeCoverageRelationStatistics Valid=1310, Invalid=10462, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:59:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-05 05:59:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 10157. [2021-06-05 05:59:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.3509255612445843) internal successors, (34032), 10156 states have internal predecessors, (34032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 34032 transitions. [2021-06-05 05:59:33,086 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 34032 transitions. Word has length 36 [2021-06-05 05:59:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:33,087 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 34032 transitions. [2021-06-05 05:59:33,087 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) [2021-06-05 05:59:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 34032 transitions. [2021-06-05 05:59:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:33,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:33,099 INFO L521 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] [2021-06-05 05:59:33,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:33,299 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2004453517, now seen corresponding path program 94 times [2021-06-05 05:59:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:33,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205717508] [2021-06-05 05:59:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:33,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:33,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205717508] [2021-06-05 05:59:33,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205717508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:33,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198228299] [2021-06-05 05:59:33,656 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 [2021-06-05 05:59:33,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:59:33,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:59:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:34,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198228299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:34,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:34,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:59:34,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202078879] [2021-06-05 05:59:34,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:59:34,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:59:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:59:34,379 INFO L87 Difference]: Start difference. First operand 10157 states and 34032 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) [2021-06-05 05:59:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:36,322 INFO L93 Difference]: Finished difference Result 12794 states and 41988 transitions. [2021-06-05 05:59:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:59:36,323 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 [2021-06-05 05:59:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:36,345 INFO L225 Difference]: With dead ends: 12794 [2021-06-05 05:59:36,345 INFO L226 Difference]: Without dead ends: 12713 [2021-06-05 05:59:36,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1935.5ms TimeCoverageRelationStatistics Valid=597, Invalid=3185, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:59:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12713 states. [2021-06-05 05:59:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12713 to 10237. [2021-06-05 05:59:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10237 states, 10236 states have (on average 3.34779210629152) internal successors, (34268), 10236 states have internal predecessors, (34268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 34268 transitions. [2021-06-05 05:59:36,607 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 34268 transitions. Word has length 36 [2021-06-05 05:59:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:36,607 INFO L482 AbstractCegarLoop]: Abstraction has 10237 states and 34268 transitions. [2021-06-05 05:59:36,607 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) [2021-06-05 05:59:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 34268 transitions. [2021-06-05 05:59:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:36,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:36,620 INFO L521 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] [2021-06-05 05:59:36,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-06-05 05:59:36,820 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1166526349, now seen corresponding path program 95 times [2021-06-05 05:59:36,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:36,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223461755] [2021-06-05 05:59:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:37,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:37,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223461755] [2021-06-05 05:59:37,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223461755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:37,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893785599] [2021-06-05 05:59:37,083 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 [2021-06-05 05:59:37,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:59:37,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:59:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:37,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893785599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:37,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:37,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:59:37,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697326520] [2021-06-05 05:59:37,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:59:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:59:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:59:37,784 INFO L87 Difference]: Start difference. First operand 10237 states and 34268 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) [2021-06-05 05:59:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:39,869 INFO L93 Difference]: Finished difference Result 11288 states and 37070 transitions. [2021-06-05 05:59:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:59:39,870 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 [2021-06-05 05:59:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:39,887 INFO L225 Difference]: With dead ends: 11288 [2021-06-05 05:59:39,887 INFO L226 Difference]: Without dead ends: 11112 [2021-06-05 05:59:39,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2010.5ms TimeCoverageRelationStatistics Valid=767, Invalid=4063, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:59:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11112 states. [2021-06-05 05:59:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11112 to 10185. [2021-06-05 05:59:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10185 states, 10184 states have (on average 3.3521209740769833) internal successors, (34138), 10184 states have internal predecessors, (34138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10185 states to 10185 states and 34138 transitions. [2021-06-05 05:59:40,047 INFO L78 Accepts]: Start accepts. Automaton has 10185 states and 34138 transitions. Word has length 36 [2021-06-05 05:59:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:40,047 INFO L482 AbstractCegarLoop]: Abstraction has 10185 states and 34138 transitions. [2021-06-05 05:59:40,048 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) [2021-06-05 05:59:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 10185 states and 34138 transitions. [2021-06-05 05:59:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:40,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:40,059 INFO L521 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] [2021-06-05 05:59:40,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable782,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:40,260 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash 488464529, now seen corresponding path program 96 times [2021-06-05 05:59:40,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:40,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158282181] [2021-06-05 05:59:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:40,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:40,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158282181] [2021-06-05 05:59:40,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158282181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:40,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694877667] [2021-06-05 05:59:40,645 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:40,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:59:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:59:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:41,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694877667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:41,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:41,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:59:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279703684] [2021-06-05 05:59:41,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:59:41,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:59:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:59:41,360 INFO L87 Difference]: Start difference. First operand 10185 states and 34138 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) [2021-06-05 05:59:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:45,448 INFO L93 Difference]: Finished difference Result 17253 states and 55366 transitions. [2021-06-05 05:59:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:59:45,448 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 [2021-06-05 05:59:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:45,473 INFO L225 Difference]: With dead ends: 17253 [2021-06-05 05:59:45,474 INFO L226 Difference]: Without dead ends: 17139 [2021-06-05 05:59:45,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 3847.8ms TimeCoverageRelationStatistics Valid=1416, Invalid=6774, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:59:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17139 states. [2021-06-05 05:59:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17139 to 10201. [2021-06-05 05:59:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10201 states, 10200 states have (on average 3.3519607843137256) internal successors, (34190), 10200 states have internal predecessors, (34190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10201 states to 10201 states and 34190 transitions. [2021-06-05 05:59:45,667 INFO L78 Accepts]: Start accepts. Automaton has 10201 states and 34190 transitions. Word has length 36 [2021-06-05 05:59:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 10201 states and 34190 transitions. [2021-06-05 05:59:45,667 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) [2021-06-05 05:59:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10201 states and 34190 transitions. [2021-06-05 05:59:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:45,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:45,679 INFO L521 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] [2021-06-05 05:59:45,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:45,880 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:45,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1905948305, now seen corresponding path program 97 times [2021-06-05 05:59:45,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:45,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117204063] [2021-06-05 05:59:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:46,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:46,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117204063] [2021-06-05 05:59:46,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117204063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:46,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233726501] [2021-06-05 05:59:46,155 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 [2021-06-05 05:59:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:59:46,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:46,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233726501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:46,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:46,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 05:59:46,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353195005] [2021-06-05 05:59:46,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:46,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:46,798 INFO L87 Difference]: Start difference. First operand 10201 states and 34190 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) [2021-06-05 05:59:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:50,019 INFO L93 Difference]: Finished difference Result 15169 states and 48868 transitions. [2021-06-05 05:59:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:59:50,019 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 [2021-06-05 05:59:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:50,040 INFO L225 Difference]: With dead ends: 15169 [2021-06-05 05:59:50,040 INFO L226 Difference]: Without dead ends: 14937 [2021-06-05 05:59:50,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2768.1ms TimeCoverageRelationStatistics Valid=1260, Invalid=6930, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:59:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14937 states. [2021-06-05 05:59:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14937 to 10183. [2021-06-05 05:59:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10183 states, 10182 states have (on average 3.350815164014928) internal successors, (34118), 10182 states have internal predecessors, (34118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 34118 transitions. [2021-06-05 05:59:50,213 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 34118 transitions. Word has length 36 [2021-06-05 05:59:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:50,213 INFO L482 AbstractCegarLoop]: Abstraction has 10183 states and 34118 transitions. [2021-06-05 05:59:50,213 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) [2021-06-05 05:59:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 34118 transitions. [2021-06-05 05:59:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:50,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:50,225 INFO L521 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] [2021-06-05 05:59:50,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 05:59:50,425 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1396525427, now seen corresponding path program 98 times [2021-06-05 05:59:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:50,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204519585] [2021-06-05 05:59:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:50,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:50,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204519585] [2021-06-05 05:59:50,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204519585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:50,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268021537] [2021-06-05 05:59:50,693 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 [2021-06-05 05:59:50,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:50,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:59:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:51,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268021537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:51,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:51,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 05:59:51,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173334248] [2021-06-05 05:59:51,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:59:51,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:59:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:59:51,285 INFO L87 Difference]: Start difference. First operand 10183 states and 34118 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) [2021-06-05 05:59:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:56,206 INFO L93 Difference]: Finished difference Result 16161 states and 51778 transitions. [2021-06-05 05:59:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 05:59:56,206 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 [2021-06-05 05:59:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:56,228 INFO L225 Difference]: With dead ends: 16161 [2021-06-05 05:59:56,228 INFO L226 Difference]: Without dead ends: 15902 [2021-06-05 05:59:56,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 3794.6ms TimeCoverageRelationStatistics Valid=1569, Invalid=10203, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:59:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15902 states. [2021-06-05 05:59:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15902 to 10240. [2021-06-05 05:59:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10240 states, 10239 states have (on average 3.352378161929876) internal successors, (34325), 10239 states have internal predecessors, (34325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10240 states to 10240 states and 34325 transitions. [2021-06-05 05:59:56,436 INFO L78 Accepts]: Start accepts. Automaton has 10240 states and 34325 transitions. Word has length 36 [2021-06-05 05:59:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:56,436 INFO L482 AbstractCegarLoop]: Abstraction has 10240 states and 34325 transitions. [2021-06-05 05:59:56,437 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) [2021-06-05 05:59:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10240 states and 34325 transitions. [2021-06-05 05:59:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:59:56,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:56,449 INFO L521 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] [2021-06-05 05:59:56,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-06-05 05:59:56,650 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1908589359, now seen corresponding path program 99 times [2021-06-05 05:59:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:56,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049334263] [2021-06-05 05:59:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:57,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049334263] [2021-06-05 05:59:57,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049334263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132184905] [2021-06-05 05:59:57,031 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 [2021-06-05 05:59:57,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:59:57,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:59:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:57,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132184905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:57,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:57,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 05:59:57,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576547275] [2021-06-05 05:59:57,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:59:57,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:59:57,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:59:57,674 INFO L87 Difference]: Start difference. First operand 10240 states and 34325 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) [2021-06-05 06:00:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:00,839 INFO L93 Difference]: Finished difference Result 19752 states and 64171 transitions. [2021-06-05 06:00:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:00:00,840 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 [2021-06-05 06:00:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:00,871 INFO L225 Difference]: With dead ends: 19752 [2021-06-05 06:00:00,871 INFO L226 Difference]: Without dead ends: 19608 [2021-06-05 06:00:00,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2907.6ms TimeCoverageRelationStatistics Valid=1149, Invalid=4703, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:00:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19608 states. [2021-06-05 06:00:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19608 to 10257. [2021-06-05 06:00:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 3.3517940717628707) internal successors, (34376), 10256 states have internal predecessors, (34376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 34376 transitions. [2021-06-05 06:00:01,085 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 34376 transitions. Word has length 36 [2021-06-05 06:00:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:01,085 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 34376 transitions. [2021-06-05 06:00:01,085 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) [2021-06-05 06:00:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 34376 transitions. [2021-06-05 06:00:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:01,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:01,097 INFO L521 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] [2021-06-05 06:00:01,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:01,298 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1183551919, now seen corresponding path program 100 times [2021-06-05 06:00:01,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:01,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336935563] [2021-06-05 06:00:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:01,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336935563] [2021-06-05 06:00:01,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336935563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:01,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490603077] [2021-06-05 06:00:01,618 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 [2021-06-05 06:00:01,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:00:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:00:01,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:02,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490603077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:02,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:02,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:00:02,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956699750] [2021-06-05 06:00:02,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:00:02,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:00:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:00:02,327 INFO L87 Difference]: Start difference. First operand 10257 states and 34376 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) [2021-06-05 06:00:03,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:03,962 INFO L93 Difference]: Finished difference Result 13308 states and 43782 transitions. [2021-06-05 06:00:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:00:03,963 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 [2021-06-05 06:00:03,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:03,985 INFO L225 Difference]: With dead ends: 13308 [2021-06-05 06:00:03,985 INFO L226 Difference]: Without dead ends: 13188 [2021-06-05 06:00:03,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1639.4ms TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:00:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13188 states. [2021-06-05 06:00:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13188 to 10257. [2021-06-05 06:00:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 3.3517940717628707) internal successors, (34376), 10256 states have internal predecessors, (34376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 34376 transitions. [2021-06-05 06:00:04,178 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 34376 transitions. Word has length 36 [2021-06-05 06:00:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:04,178 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 34376 transitions. [2021-06-05 06:00:04,178 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) [2021-06-05 06:00:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 34376 transitions. [2021-06-05 06:00:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:04,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:04,191 INFO L521 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] [2021-06-05 06:00:04,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 06:00:04,392 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1538494053, now seen corresponding path program 101 times [2021-06-05 06:00:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:04,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773278012] [2021-06-05 06:00:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773278012] [2021-06-05 06:00:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773278012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552693279] [2021-06-05 06:00:04,666 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 [2021-06-05 06:00:04,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:00:04,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:00:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552693279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:05,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:05,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:00:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952213652] [2021-06-05 06:00:05,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:00:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:05,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:00:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:00:05,225 INFO L87 Difference]: Start difference. First operand 10257 states and 34376 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) [2021-06-05 06:00:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:07,593 INFO L93 Difference]: Finished difference Result 12373 states and 40493 transitions. [2021-06-05 06:00:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:00:07,593 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 [2021-06-05 06:00:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:07,611 INFO L225 Difference]: With dead ends: 12373 [2021-06-05 06:00:07,611 INFO L226 Difference]: Without dead ends: 12120 [2021-06-05 06:00:07,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1908.8ms TimeCoverageRelationStatistics Valid=802, Invalid=4028, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:00:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12120 states. [2021-06-05 06:00:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12120 to 10415. [2021-06-05 06:00:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 3.3470328404071443) internal successors, (34856), 10414 states have internal predecessors, (34856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 34856 transitions. [2021-06-05 06:00:07,784 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 34856 transitions. Word has length 36 [2021-06-05 06:00:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:07,785 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 34856 transitions. [2021-06-05 06:00:07,785 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) [2021-06-05 06:00:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 34856 transitions. [2021-06-05 06:00:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:07,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:07,797 INFO L521 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] [2021-06-05 06:00:07,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:07,998 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1968113819, now seen corresponding path program 102 times [2021-06-05 06:00:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:07,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160810215] [2021-06-05 06:00:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:08,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:08,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160810215] [2021-06-05 06:00:08,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160810215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:08,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505786197] [2021-06-05 06:00:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:08,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:00:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:00:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:08,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505786197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:08,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:08,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:00:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879455144] [2021-06-05 06:00:08,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:00:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:00:08,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:00:08,786 INFO L87 Difference]: Start difference. First operand 10415 states and 34856 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) [2021-06-05 06:00:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:12,060 INFO L93 Difference]: Finished difference Result 15169 states and 48898 transitions. [2021-06-05 06:00:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:00:12,060 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 [2021-06-05 06:00:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:12,085 INFO L225 Difference]: With dead ends: 15169 [2021-06-05 06:00:12,085 INFO L226 Difference]: Without dead ends: 14971 [2021-06-05 06:00:12,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 2523.1ms TimeCoverageRelationStatistics Valid=1076, Invalid=5244, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:00:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14971 states. [2021-06-05 06:00:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14971 to 10452. [2021-06-05 06:00:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 3.348579083341307) internal successors, (34996), 10451 states have internal predecessors, (34996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 34996 transitions. [2021-06-05 06:00:12,295 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 34996 transitions. Word has length 36 [2021-06-05 06:00:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:12,295 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 34996 transitions. [2021-06-05 06:00:12,295 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) [2021-06-05 06:00:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 34996 transitions. [2021-06-05 06:00:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:12,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:12,308 INFO L521 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] [2021-06-05 06:00:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 06:00:12,508 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash 297320461, now seen corresponding path program 103 times [2021-06-05 06:00:12,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:12,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519229831] [2021-06-05 06:00:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:12,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:12,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519229831] [2021-06-05 06:00:12,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519229831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:12,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6598838] [2021-06-05 06:00:12,800 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 [2021-06-05 06:00:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:00:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6598838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:13,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:13,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:00:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105178802] [2021-06-05 06:00:13,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:00:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:00:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:00:13,435 INFO L87 Difference]: Start difference. First operand 10452 states and 34996 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) [2021-06-05 06:00:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:16,181 INFO L93 Difference]: Finished difference Result 15726 states and 50688 transitions. [2021-06-05 06:00:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:00:16,182 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 [2021-06-05 06:00:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:16,207 INFO L225 Difference]: With dead ends: 15726 [2021-06-05 06:00:16,207 INFO L226 Difference]: Without dead ends: 15524 [2021-06-05 06:00:16,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2556.8ms TimeCoverageRelationStatistics Valid=1127, Invalid=5035, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:00:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15524 states. [2021-06-05 06:00:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15524 to 10429. [2021-06-05 06:00:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10429 states, 10428 states have (on average 3.3469505178365937) internal successors, (34902), 10428 states have internal predecessors, (34902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10429 states to 10429 states and 34902 transitions. [2021-06-05 06:00:16,421 INFO L78 Accepts]: Start accepts. Automaton has 10429 states and 34902 transitions. Word has length 36 [2021-06-05 06:00:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:16,421 INFO L482 AbstractCegarLoop]: Abstraction has 10429 states and 34902 transitions. [2021-06-05 06:00:16,421 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) [2021-06-05 06:00:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10429 states and 34902 transitions. [2021-06-05 06:00:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:16,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:16,435 INFO L521 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] [2021-06-05 06:00:16,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:16,645 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:16,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1098339159, now seen corresponding path program 104 times [2021-06-05 06:00:16,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:16,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865561858] [2021-06-05 06:00:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:17,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865561858] [2021-06-05 06:00:17,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865561858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296937135] [2021-06-05 06:00:17,000 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 [2021-06-05 06:00:17,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:00:17,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:17,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:00:17,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:17,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296937135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:17,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:17,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:00:17,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029757270] [2021-06-05 06:00:17,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:00:17,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:00:17,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:00:17,551 INFO L87 Difference]: Start difference. First operand 10429 states and 34902 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) [2021-06-05 06:00:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:18,969 INFO L93 Difference]: Finished difference Result 11947 states and 39281 transitions. [2021-06-05 06:00:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:00:18,969 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 [2021-06-05 06:00:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:18,989 INFO L225 Difference]: With dead ends: 11947 [2021-06-05 06:00:18,989 INFO L226 Difference]: Without dead ends: 11754 [2021-06-05 06:00:18,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1526.7ms TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:00:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2021-06-05 06:00:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 10440. [2021-06-05 06:00:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.347830251939841) internal successors, (34948), 10439 states have internal predecessors, (34948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 34948 transitions. [2021-06-05 06:00:19,228 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 34948 transitions. Word has length 36 [2021-06-05 06:00:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:19,228 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 34948 transitions. [2021-06-05 06:00:19,228 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) [2021-06-05 06:00:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 34948 transitions. [2021-06-05 06:00:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:19,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:19,241 INFO L521 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] [2021-06-05 06:00:19,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:19,441 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash -146066803, now seen corresponding path program 105 times [2021-06-05 06:00:19,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:19,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97448268] [2021-06-05 06:00:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:19,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:19,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97448268] [2021-06-05 06:00:19,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97448268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:19,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874140927] [2021-06-05 06:00:19,675 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 [2021-06-05 06:00:19,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:00:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:00:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:20,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874140927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:20,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:20,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:00:20,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878515526] [2021-06-05 06:00:20,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:00:20,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:20,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:00:20,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:00:20,236 INFO L87 Difference]: Start difference. First operand 10440 states and 34948 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) [2021-06-05 06:00:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:21,805 INFO L93 Difference]: Finished difference Result 17451 states and 57222 transitions. [2021-06-05 06:00:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:00:21,806 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 [2021-06-05 06:00:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:21,832 INFO L225 Difference]: With dead ends: 17451 [2021-06-05 06:00:21,832 INFO L226 Difference]: Without dead ends: 17371 [2021-06-05 06:00:21,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1285.5ms TimeCoverageRelationStatistics Valid=543, Invalid=2213, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:00:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2021-06-05 06:00:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 10503. [2021-06-05 06:00:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10503 states, 10502 states have (on average 3.3498381260712247) internal successors, (35180), 10502 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10503 states to 10503 states and 35180 transitions. [2021-06-05 06:00:22,043 INFO L78 Accepts]: Start accepts. Automaton has 10503 states and 35180 transitions. Word has length 36 [2021-06-05 06:00:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:22,043 INFO L482 AbstractCegarLoop]: Abstraction has 10503 states and 35180 transitions. [2021-06-05 06:00:22,043 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) [2021-06-05 06:00:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10503 states and 35180 transitions. [2021-06-05 06:00:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:22,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:22,055 INFO L521 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] [2021-06-05 06:00:22,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-05 06:00:22,256 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash -533222687, now seen corresponding path program 106 times [2021-06-05 06:00:22,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:22,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873761147] [2021-06-05 06:00:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:22,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:22,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873761147] [2021-06-05 06:00:22,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873761147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:22,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751189926] [2021-06-05 06:00:22,499 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 [2021-06-05 06:00:22,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:00:22,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:00:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751189926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:00:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241679620] [2021-06-05 06:00:23,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:00:23,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:23,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:00:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:00:23,209 INFO L87 Difference]: Start difference. First operand 10503 states and 35180 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) [2021-06-05 06:00:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:25,223 INFO L93 Difference]: Finished difference Result 16343 states and 53660 transitions. [2021-06-05 06:00:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:00:25,224 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 [2021-06-05 06:00:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:25,258 INFO L225 Difference]: With dead ends: 16343 [2021-06-05 06:00:25,258 INFO L226 Difference]: Without dead ends: 16263 [2021-06-05 06:00:25,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1752.0ms TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:00:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16263 states. [2021-06-05 06:00:25,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16263 to 10501. [2021-06-05 06:00:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 10500 states have (on average 3.349904761904762) internal successors, (35174), 10500 states have internal predecessors, (35174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 35174 transitions. [2021-06-05 06:00:25,485 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 35174 transitions. Word has length 36 [2021-06-05 06:00:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:25,485 INFO L482 AbstractCegarLoop]: Abstraction has 10501 states and 35174 transitions. [2021-06-05 06:00:25,485 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) [2021-06-05 06:00:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 35174 transitions. [2021-06-05 06:00:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:25,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:25,498 INFO L521 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] [2021-06-05 06:00:25,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:25,700 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1932805219, now seen corresponding path program 107 times [2021-06-05 06:00:25,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:25,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081241971] [2021-06-05 06:00:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:26,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:26,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081241971] [2021-06-05 06:00:26,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081241971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:26,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848956343] [2021-06-05 06:00:26,063 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 [2021-06-05 06:00:26,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:00:26,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:00:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:26,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848956343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:26,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:26,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:00:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207729573] [2021-06-05 06:00:26,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:00:26,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:26,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:00:26,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:00:26,721 INFO L87 Difference]: Start difference. First operand 10501 states and 35174 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) [2021-06-05 06:00:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:30,271 INFO L93 Difference]: Finished difference Result 15923 states and 51600 transitions. [2021-06-05 06:00:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:00:30,272 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 [2021-06-05 06:00:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:30,296 INFO L225 Difference]: With dead ends: 15923 [2021-06-05 06:00:30,296 INFO L226 Difference]: Without dead ends: 15816 [2021-06-05 06:00:30,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 2981.0ms TimeCoverageRelationStatistics Valid=1124, Invalid=5682, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 06:00:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15816 states. [2021-06-05 06:00:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15816 to 10595. [2021-06-05 06:00:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 3.35019822541061) internal successors, (35492), 10594 states have internal predecessors, (35492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 35492 transitions. [2021-06-05 06:00:30,506 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 35492 transitions. Word has length 36 [2021-06-05 06:00:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:30,506 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 35492 transitions. [2021-06-05 06:00:30,506 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) [2021-06-05 06:00:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 35492 transitions. [2021-06-05 06:00:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:30,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:30,519 INFO L521 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] [2021-06-05 06:00:30,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable861,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:30,720 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -648664159, now seen corresponding path program 108 times [2021-06-05 06:00:30,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:30,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26946724] [2021-06-05 06:00:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:30,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:30,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26946724] [2021-06-05 06:00:30,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26946724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:30,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112548961] [2021-06-05 06:00:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:31,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:00:31,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:00:31,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:31,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112548961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:31,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:31,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:00:31,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446080840] [2021-06-05 06:00:31,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:00:31,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:31,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:00:31,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:00:31,638 INFO L87 Difference]: Start difference. First operand 10595 states and 35492 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) [2021-06-05 06:00:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:36,277 INFO L93 Difference]: Finished difference Result 18637 states and 59259 transitions. [2021-06-05 06:00:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 06:00:36,277 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 [2021-06-05 06:00:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:36,303 INFO L225 Difference]: With dead ends: 18637 [2021-06-05 06:00:36,304 INFO L226 Difference]: Without dead ends: 18454 [2021-06-05 06:00:36,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 3574.4ms TimeCoverageRelationStatistics Valid=1482, Invalid=7830, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 06:00:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18454 states. [2021-06-05 06:00:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18454 to 10613. [2021-06-05 06:00:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.3513004146249528) internal successors, (35564), 10612 states have internal predecessors, (35564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 35564 transitions. [2021-06-05 06:00:36,525 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 35564 transitions. Word has length 36 [2021-06-05 06:00:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:36,525 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 35564 transitions. [2021-06-05 06:00:36,525 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) [2021-06-05 06:00:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 35564 transitions. [2021-06-05 06:00:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:36,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:36,538 INFO L521 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] [2021-06-05 06:00:36,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-06-05 06:00:36,739 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1625491043, now seen corresponding path program 109 times [2021-06-05 06:00:36,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:36,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940430842] [2021-06-05 06:00:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:37,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:37,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940430842] [2021-06-05 06:00:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940430842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:37,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509166157] [2021-06-05 06:00:37,076 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 [2021-06-05 06:00:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:00:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:37,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509166157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:37,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:37,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:00:37,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792864401] [2021-06-05 06:00:37,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:37,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:37,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:37,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:37,727 INFO L87 Difference]: Start difference. First operand 10613 states and 35564 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) [2021-06-05 06:00:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:42,610 INFO L93 Difference]: Finished difference Result 18780 states and 59813 transitions. [2021-06-05 06:00:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 06:00:42,611 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 [2021-06-05 06:00:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:42,637 INFO L225 Difference]: With dead ends: 18780 [2021-06-05 06:00:42,637 INFO L226 Difference]: Without dead ends: 18608 [2021-06-05 06:00:42,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 3656.8ms TimeCoverageRelationStatistics Valid=1714, Invalid=8186, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 06:00:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18608 states. [2021-06-05 06:00:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18608 to 10593. [2021-06-05 06:00:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 3.3500755287009065) internal successors, (35484), 10592 states have internal predecessors, (35484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 35484 transitions. [2021-06-05 06:00:42,855 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 35484 transitions. Word has length 36 [2021-06-05 06:00:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:42,855 INFO L482 AbstractCegarLoop]: Abstraction has 10593 states and 35484 transitions. [2021-06-05 06:00:42,855 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) [2021-06-05 06:00:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 35484 transitions. [2021-06-05 06:00:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:42,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:42,868 INFO L521 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] [2021-06-05 06:00:43,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable869,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:43,068 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash 455377993, now seen corresponding path program 110 times [2021-06-05 06:00:43,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:43,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334990852] [2021-06-05 06:00:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:43,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:43,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334990852] [2021-06-05 06:00:43,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334990852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:43,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670164885] [2021-06-05 06:00:43,445 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 [2021-06-05 06:00:43,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:00:43,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:43,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:00:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:44,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670164885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:44,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:44,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:00:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774879647] [2021-06-05 06:00:44,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:00:44,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:00:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:00:44,106 INFO L87 Difference]: Start difference. First operand 10593 states and 35484 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) [2021-06-05 06:00:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:46,827 INFO L93 Difference]: Finished difference Result 15959 states and 51655 transitions. [2021-06-05 06:00:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:00:46,827 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 [2021-06-05 06:00:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:46,851 INFO L225 Difference]: With dead ends: 15959 [2021-06-05 06:00:46,852 INFO L226 Difference]: Without dead ends: 15821 [2021-06-05 06:00:46,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2532.5ms TimeCoverageRelationStatistics Valid=993, Invalid=4557, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:00:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2021-06-05 06:00:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 10619. [2021-06-05 06:00:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 3.351290261819552) internal successors, (35584), 10618 states have internal predecessors, (35584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 35584 transitions. [2021-06-05 06:00:47,043 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 35584 transitions. Word has length 36 [2021-06-05 06:00:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:47,043 INFO L482 AbstractCegarLoop]: Abstraction has 10619 states and 35584 transitions. [2021-06-05 06:00:47,043 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) [2021-06-05 06:00:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 35584 transitions. [2021-06-05 06:00:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:47,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:47,056 INFO L521 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] [2021-06-05 06:00:47,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 06:00:47,256 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1739519053, now seen corresponding path program 111 times [2021-06-05 06:00:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:47,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356417204] [2021-06-05 06:00:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:47,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:47,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356417204] [2021-06-05 06:00:47,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356417204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:47,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449291338] [2021-06-05 06:00:47,544 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 [2021-06-05 06:00:47,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:00:47,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:00:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:48,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449291338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:48,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:48,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:00:48,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871801021] [2021-06-05 06:00:48,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:00:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:00:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:00:48,138 INFO L87 Difference]: Start difference. First operand 10619 states and 35584 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) [2021-06-05 06:00:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:52,849 INFO L93 Difference]: Finished difference Result 18681 states and 59398 transitions. [2021-06-05 06:00:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 06:00:52,850 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 [2021-06-05 06:00:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:52,885 INFO L225 Difference]: With dead ends: 18681 [2021-06-05 06:00:52,885 INFO L226 Difference]: Without dead ends: 18498 [2021-06-05 06:00:52,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 3565.2ms TimeCoverageRelationStatistics Valid=1538, Invalid=8164, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 06:00:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18498 states. [2021-06-05 06:00:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18498 to 10601. [2021-06-05 06:00:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.350188679245283) internal successors, (35512), 10600 states have internal predecessors, (35512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 35512 transitions. [2021-06-05 06:00:53,165 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 35512 transitions. Word has length 36 [2021-06-05 06:00:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:53,165 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 35512 transitions. [2021-06-05 06:00:53,165 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) [2021-06-05 06:00:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 35512 transitions. [2021-06-05 06:00:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:53,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:53,179 INFO L521 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] [2021-06-05 06:00:53,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:53,379 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash 762692169, now seen corresponding path program 112 times [2021-06-05 06:00:53,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:53,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979686629] [2021-06-05 06:00:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:53,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:53,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979686629] [2021-06-05 06:00:53,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979686629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:53,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455719733] [2021-06-05 06:00:53,729 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 [2021-06-05 06:00:53,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:00:53,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:00:53,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:54,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455719733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:54,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:54,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:00:54,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220689920] [2021-06-05 06:00:54,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:54,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:54,391 INFO L87 Difference]: Start difference. First operand 10601 states and 35512 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) [2021-06-05 06:00:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:59,086 INFO L93 Difference]: Finished difference Result 18616 states and 59315 transitions. [2021-06-05 06:00:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 06:00:59,087 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 [2021-06-05 06:00:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:59,117 INFO L225 Difference]: With dead ends: 18616 [2021-06-05 06:00:59,117 INFO L226 Difference]: Without dead ends: 18444 [2021-06-05 06:00:59,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3537 ImplicationChecksByTransitivity, 4003.4ms TimeCoverageRelationStatistics Valid=1882, Invalid=9038, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 06:00:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18444 states. [2021-06-05 06:00:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18444 to 10589. [2021-06-05 06:00:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10589 states, 10588 states have (on average 3.349452210049112) internal successors, (35464), 10588 states have internal predecessors, (35464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 35464 transitions. [2021-06-05 06:00:59,363 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 35464 transitions. Word has length 36 [2021-06-05 06:00:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:59,364 INFO L482 AbstractCegarLoop]: Abstraction has 10589 states and 35464 transitions. [2021-06-05 06:00:59,364 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) [2021-06-05 06:00:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 35464 transitions. [2021-06-05 06:00:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:00:59,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:59,379 INFO L521 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] [2021-06-05 06:00:59,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 06:00:59,580 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2003431283, now seen corresponding path program 113 times [2021-06-05 06:00:59,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:59,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831782720] [2021-06-05 06:00:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:59,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:59,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831782720] [2021-06-05 06:00:59,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831782720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:59,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927052568] [2021-06-05 06:00:59,937 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 [2021-06-05 06:00:59,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:00:59,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:00:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:00,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927052568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:00,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:00,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:01:00,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605473326] [2021-06-05 06:01:00,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:01:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:01:00,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:01:00,585 INFO L87 Difference]: Start difference. First operand 10589 states and 35464 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) [2021-06-05 06:01:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:04,176 INFO L93 Difference]: Finished difference Result 15850 states and 51407 transitions. [2021-06-05 06:01:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:01:04,176 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 [2021-06-05 06:01:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:04,201 INFO L225 Difference]: With dead ends: 15850 [2021-06-05 06:01:04,201 INFO L226 Difference]: Without dead ends: 15743 [2021-06-05 06:01:04,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 3293.0ms TimeCoverageRelationStatistics Valid=1239, Invalid=6593, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:01:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15743 states. [2021-06-05 06:01:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15743 to 10615. [2021-06-05 06:01:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 3.3499152063312607) internal successors, (35556), 10614 states have internal predecessors, (35556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 35556 transitions. [2021-06-05 06:01:04,416 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 35556 transitions. Word has length 36 [2021-06-05 06:01:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:04,416 INFO L482 AbstractCegarLoop]: Abstraction has 10615 states and 35556 transitions. [2021-06-05 06:01:04,416 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) [2021-06-05 06:01:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 35556 transitions. [2021-06-05 06:01:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:04,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:04,429 INFO L521 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] [2021-06-05 06:01:04,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 06:01:04,630 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash -719290223, now seen corresponding path program 114 times [2021-06-05 06:01:04,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:04,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379477274] [2021-06-05 06:01:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:04,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:04,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379477274] [2021-06-05 06:01:04,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379477274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:04,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235253025] [2021-06-05 06:01:04,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:04,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:01:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:01:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:05,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235253025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:05,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:05,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:01:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610953144] [2021-06-05 06:01:05,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:01:05,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:05,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:01:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:01:05,540 INFO L87 Difference]: Start difference. First operand 10615 states and 35556 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) [2021-06-05 06:01:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:10,238 INFO L93 Difference]: Finished difference Result 18195 states and 57913 transitions. [2021-06-05 06:01:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 06:01:10,239 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 [2021-06-05 06:01:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:10,265 INFO L225 Difference]: With dead ends: 18195 [2021-06-05 06:01:10,266 INFO L226 Difference]: Without dead ends: 18012 [2021-06-05 06:01:10,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 3864.0ms TimeCoverageRelationStatistics Valid=1673, Invalid=9039, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 06:01:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-05 06:01:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 10571. [2021-06-05 06:01:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.34720908230842) internal successors, (35380), 10570 states have internal predecessors, (35380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 35380 transitions. [2021-06-05 06:01:10,490 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 35380 transitions. Word has length 36 [2021-06-05 06:01:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:10,490 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 35380 transitions. [2021-06-05 06:01:10,491 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) [2021-06-05 06:01:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 35380 transitions. [2021-06-05 06:01:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:10,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:10,503 INFO L521 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] [2021-06-05 06:01:10,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-06-05 06:01:10,703 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1153774679, now seen corresponding path program 115 times [2021-06-05 06:01:10,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:10,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622695594] [2021-06-05 06:01:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:11,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:11,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622695594] [2021-06-05 06:01:11,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622695594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649441835] [2021-06-05 06:01:11,066 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 [2021-06-05 06:01:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:01:11,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:11,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649441835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:11,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:11,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:01:11,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697378863] [2021-06-05 06:01:11,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:01:11,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:11,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:01:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:01:11,734 INFO L87 Difference]: Start difference. First operand 10571 states and 35380 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) [2021-06-05 06:01:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:13,464 INFO L93 Difference]: Finished difference Result 12516 states and 41213 transitions. [2021-06-05 06:01:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:01:13,464 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 [2021-06-05 06:01:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:13,484 INFO L225 Difference]: With dead ends: 12516 [2021-06-05 06:01:13,484 INFO L226 Difference]: Without dead ends: 12391 [2021-06-05 06:01:13,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1656.0ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:01:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12391 states. [2021-06-05 06:01:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12391 to 10595. [2021-06-05 06:01:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 3.3475552199358125) internal successors, (35464), 10594 states have internal predecessors, (35464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 35464 transitions. [2021-06-05 06:01:13,652 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 35464 transitions. Word has length 36 [2021-06-05 06:01:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:13,652 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 35464 transitions. [2021-06-05 06:01:13,652 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) [2021-06-05 06:01:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 35464 transitions. [2021-06-05 06:01:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:13,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:13,664 INFO L521 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] [2021-06-05 06:01:13,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable896,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:13,866 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:13,866 INFO L82 PathProgramCache]: Analyzing trace with hash -232072539, now seen corresponding path program 116 times [2021-06-05 06:01:13,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:13,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214614898] [2021-06-05 06:01:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:14,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214614898] [2021-06-05 06:01:14,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214614898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287776051] [2021-06-05 06:01:14,168 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 [2021-06-05 06:01:14,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:01:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:01:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287776051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:14,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:14,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:01:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617036411] [2021-06-05 06:01:14,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:01:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:01:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:01:14,806 INFO L87 Difference]: Start difference. First operand 10595 states and 35464 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) [2021-06-05 06:01:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:16,319 INFO L93 Difference]: Finished difference Result 13270 states and 43440 transitions. [2021-06-05 06:01:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:01:16,319 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 [2021-06-05 06:01:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:16,342 INFO L225 Difference]: With dead ends: 13270 [2021-06-05 06:01:16,342 INFO L226 Difference]: Without dead ends: 13138 [2021-06-05 06:01:16,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1420.1ms TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:01:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2021-06-05 06:01:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 10585. [2021-06-05 06:01:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 3.3473167044595615) internal successors, (35428), 10584 states have internal predecessors, (35428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 35428 transitions. [2021-06-05 06:01:16,532 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 35428 transitions. Word has length 36 [2021-06-05 06:01:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 10585 states and 35428 transitions. [2021-06-05 06:01:16,532 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) [2021-06-05 06:01:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 35428 transitions. [2021-06-05 06:01:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:16,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:16,544 INFO L521 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] [2021-06-05 06:01:16,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 06:01:16,749 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1492112215, now seen corresponding path program 117 times [2021-06-05 06:01:16,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:16,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142198104] [2021-06-05 06:01:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:17,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:17,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142198104] [2021-06-05 06:01:17,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142198104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:17,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076801891] [2021-06-05 06:01:17,023 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 [2021-06-05 06:01:17,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:01:17,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:17,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:01:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:17,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076801891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:17,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:17,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:01:17,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536409737] [2021-06-05 06:01:17,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:01:17,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:17,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:01:17,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:01:17,559 INFO L87 Difference]: Start difference. First operand 10585 states and 35428 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) [2021-06-05 06:01:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:19,174 INFO L93 Difference]: Finished difference Result 12032 states and 39573 transitions. [2021-06-05 06:01:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:01:19,175 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 [2021-06-05 06:01:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:19,191 INFO L225 Difference]: With dead ends: 12032 [2021-06-05 06:01:19,191 INFO L226 Difference]: Without dead ends: 11839 [2021-06-05 06:01:19,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1379.5ms TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:01:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-06-05 06:01:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 10585. [2021-06-05 06:01:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 3.3473167044595615) internal successors, (35428), 10584 states have internal predecessors, (35428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 35428 transitions. [2021-06-05 06:01:19,362 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 35428 transitions. Word has length 36 [2021-06-05 06:01:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:19,362 INFO L482 AbstractCegarLoop]: Abstraction has 10585 states and 35428 transitions. [2021-06-05 06:01:19,362 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) [2021-06-05 06:01:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 35428 transitions. [2021-06-05 06:01:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:19,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:19,375 INFO L521 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] [2021-06-05 06:01:19,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:19,576 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1727967773, now seen corresponding path program 118 times [2021-06-05 06:01:19,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:19,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908267026] [2021-06-05 06:01:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:19,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908267026] [2021-06-05 06:01:19,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908267026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953871608] [2021-06-05 06:01:19,943 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 [2021-06-05 06:01:19,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:01:19,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:01:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953871608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:20,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:20,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:01:20,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738306781] [2021-06-05 06:01:20,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:01:20,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:20,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:01:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:01:20,718 INFO L87 Difference]: Start difference. First operand 10585 states and 35428 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) [2021-06-05 06:01:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:24,498 INFO L93 Difference]: Finished difference Result 17457 states and 56009 transitions. [2021-06-05 06:01:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:01:24,498 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 [2021-06-05 06:01:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:24,527 INFO L225 Difference]: With dead ends: 17457 [2021-06-05 06:01:24,528 INFO L226 Difference]: Without dead ends: 17331 [2021-06-05 06:01:24,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 3285.4ms TimeCoverageRelationStatistics Valid=1040, Invalid=6270, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 06:01:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17331 states. [2021-06-05 06:01:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17331 to 10578. [2021-06-05 06:01:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10578 states, 10577 states have (on average 3.346222936560461) internal successors, (35393), 10577 states have internal predecessors, (35393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10578 states to 10578 states and 35393 transitions. [2021-06-05 06:01:24,763 INFO L78 Accepts]: Start accepts. Automaton has 10578 states and 35393 transitions. Word has length 36 [2021-06-05 06:01:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:24,763 INFO L482 AbstractCegarLoop]: Abstraction has 10578 states and 35393 transitions. [2021-06-05 06:01:24,763 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) [2021-06-05 06:01:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 10578 states and 35393 transitions. [2021-06-05 06:01:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:24,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:24,777 INFO L521 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] [2021-06-05 06:01:24,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:24,977 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1692290787, now seen corresponding path program 119 times [2021-06-05 06:01:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:24,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361804093] [2021-06-05 06:01:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:25,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361804093] [2021-06-05 06:01:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361804093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919557164] [2021-06-05 06:01:25,332 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 [2021-06-05 06:01:25,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:01:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:01:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:25,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919557164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:25,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:25,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:01:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571335260] [2021-06-05 06:01:25,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:01:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:01:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:01:25,996 INFO L87 Difference]: Start difference. First operand 10578 states and 35393 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) [2021-06-05 06:01:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:29,575 INFO L93 Difference]: Finished difference Result 16840 states and 54057 transitions. [2021-06-05 06:01:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:01:29,575 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 [2021-06-05 06:01:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:29,603 INFO L225 Difference]: With dead ends: 16840 [2021-06-05 06:01:29,603 INFO L226 Difference]: Without dead ends: 16751 [2021-06-05 06:01:29,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2977.8ms TimeCoverageRelationStatistics Valid=885, Invalid=5757, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 06:01:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16751 states. [2021-06-05 06:01:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16751 to 10636. [2021-06-05 06:01:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 10635 states have (on average 3.3441466854724964) internal successors, (35565), 10635 states have internal predecessors, (35565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 35565 transitions. [2021-06-05 06:01:29,814 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 35565 transitions. Word has length 36 [2021-06-05 06:01:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:29,814 INFO L482 AbstractCegarLoop]: Abstraction has 10636 states and 35565 transitions. [2021-06-05 06:01:29,814 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) [2021-06-05 06:01:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 35565 transitions. [2021-06-05 06:01:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:29,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:29,826 INFO L521 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] [2021-06-05 06:01:30,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable929 [2021-06-05 06:01:30,027 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:30,027 INFO L82 PathProgramCache]: Analyzing trace with hash -204015587, now seen corresponding path program 120 times [2021-06-05 06:01:30,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:30,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454690483] [2021-06-05 06:01:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:30,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:30,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454690483] [2021-06-05 06:01:30,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454690483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:30,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073790133] [2021-06-05 06:01:30,276 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 [2021-06-05 06:01:30,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:01:30,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:30,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:01:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:30,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073790133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:30,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:30,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:01:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521641752] [2021-06-05 06:01:30,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:01:30,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:01:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:01:30,882 INFO L87 Difference]: Start difference. First operand 10636 states and 35565 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) [2021-06-05 06:01:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:36,536 INFO L93 Difference]: Finished difference Result 18038 states and 57489 transitions. [2021-06-05 06:01:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 06:01:36,536 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 [2021-06-05 06:01:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:36,563 INFO L225 Difference]: With dead ends: 18038 [2021-06-05 06:01:36,563 INFO L226 Difference]: Without dead ends: 17807 [2021-06-05 06:01:36,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4193 ImplicationChecksByTransitivity, 4078.7ms TimeCoverageRelationStatistics Valid=1396, Invalid=10814, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 06:01:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-06-05 06:01:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 10618. [2021-06-05 06:01:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10618 states, 10617 states have (on average 3.34265800131864) internal successors, (35489), 10617 states have internal predecessors, (35489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10618 states to 10618 states and 35489 transitions. [2021-06-05 06:01:36,819 INFO L78 Accepts]: Start accepts. Automaton has 10618 states and 35489 transitions. Word has length 36 [2021-06-05 06:01:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:36,820 INFO L482 AbstractCegarLoop]: Abstraction has 10618 states and 35489 transitions. [2021-06-05 06:01:36,820 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) [2021-06-05 06:01:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 10618 states and 35489 transitions. [2021-06-05 06:01:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:36,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:36,833 INFO L521 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] [2021-06-05 06:01:37,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:37,034 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1384976611, now seen corresponding path program 121 times [2021-06-05 06:01:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:37,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968924427] [2021-06-05 06:01:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:01:37,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968924427] [2021-06-05 06:01:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968924427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190400863] [2021-06-05 06:01:37,346 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 [2021-06-05 06:01:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:01:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190400863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:38,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:38,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:01:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328884479] [2021-06-05 06:01:38,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:01:38,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:38,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:01:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:01:38,017 INFO L87 Difference]: Start difference. First operand 10618 states and 35489 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) [2021-06-05 06:01:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:44,228 INFO L93 Difference]: Finished difference Result 20257 states and 64198 transitions. [2021-06-05 06:01:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 06:01:44,229 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 [2021-06-05 06:01:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:44,260 INFO L225 Difference]: With dead ends: 20257 [2021-06-05 06:01:44,260 INFO L226 Difference]: Without dead ends: 20085 [2021-06-05 06:01:44,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 4507.0ms TimeCoverageRelationStatistics Valid=1962, Invalid=10920, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 06:01:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20085 states. [2021-06-05 06:01:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20085 to 10608. [2021-06-05 06:01:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 3.342038276609786) internal successors, (35449), 10607 states have internal predecessors, (35449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 35449 transitions. [2021-06-05 06:01:44,523 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 35449 transitions. Word has length 36 [2021-06-05 06:01:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:44,523 INFO L482 AbstractCegarLoop]: Abstraction has 10608 states and 35449 transitions. [2021-06-05 06:01:44,523 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) [2021-06-05 06:01:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 35449 transitions. [2021-06-05 06:01:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:44,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:44,536 INFO L521 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] [2021-06-05 06:01:44,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:44,737 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1831718969, now seen corresponding path program 122 times [2021-06-05 06:01:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:44,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307196770] [2021-06-05 06:01:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:45,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307196770] [2021-06-05 06:01:45,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307196770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977931138] [2021-06-05 06:01:45,101 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 [2021-06-05 06:01:45,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:01:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:01:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:45,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977931138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:45,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:45,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:01:45,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851289215] [2021-06-05 06:01:45,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:01:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:01:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:01:45,934 INFO L87 Difference]: Start difference. First operand 10608 states and 35449 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) [2021-06-05 06:01:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:47,894 INFO L93 Difference]: Finished difference Result 12348 states and 40169 transitions. [2021-06-05 06:01:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:01:47,894 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 [2021-06-05 06:01:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:47,913 INFO L225 Difference]: With dead ends: 12348 [2021-06-05 06:01:47,913 INFO L226 Difference]: Without dead ends: 12234 [2021-06-05 06:01:47,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1936.0ms TimeCoverageRelationStatistics Valid=417, Invalid=2775, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:01:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12234 states. [2021-06-05 06:01:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12234 to 10814. [2021-06-05 06:01:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10814 states, 10813 states have (on average 3.3427355960418015) internal successors, (36145), 10813 states have internal predecessors, (36145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10814 states to 10814 states and 36145 transitions. [2021-06-05 06:01:48,115 INFO L78 Accepts]: Start accepts. Automaton has 10814 states and 36145 transitions. Word has length 36 [2021-06-05 06:01:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:48,115 INFO L482 AbstractCegarLoop]: Abstraction has 10814 states and 36145 transitions. [2021-06-05 06:01:48,115 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) [2021-06-05 06:01:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 10814 states and 36145 transitions. [2021-06-05 06:01:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:48,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:48,129 INFO L521 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] [2021-06-05 06:01:48,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 06:01:48,330 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1596323637, now seen corresponding path program 123 times [2021-06-05 06:01:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:48,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971136776] [2021-06-05 06:01:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:48,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:48,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971136776] [2021-06-05 06:01:48,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971136776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:48,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74573467] [2021-06-05 06:01:48,690 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 [2021-06-05 06:01:48,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:01:48,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:01:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:49,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74573467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:49,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:49,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 06:01:49,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592512025] [2021-06-05 06:01:49,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:01:49,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:01:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:01:49,527 INFO L87 Difference]: Start difference. First operand 10814 states and 36145 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) [2021-06-05 06:01:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:53,831 INFO L93 Difference]: Finished difference Result 17464 states and 55985 transitions. [2021-06-05 06:01:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:01:53,831 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 [2021-06-05 06:01:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:53,858 INFO L225 Difference]: With dead ends: 17464 [2021-06-05 06:01:53,859 INFO L226 Difference]: Without dead ends: 17317 [2021-06-05 06:01:53,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 3805.9ms TimeCoverageRelationStatistics Valid=1345, Invalid=7211, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 06:01:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-06-05 06:01:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 10979. [2021-06-05 06:01:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.344962652577883) internal successors, (36721), 10978 states have internal predecessors, (36721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 36721 transitions. [2021-06-05 06:01:54,102 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 36721 transitions. Word has length 36 [2021-06-05 06:01:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:54,102 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 36721 transitions. [2021-06-05 06:01:54,102 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) [2021-06-05 06:01:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 36721 transitions. [2021-06-05 06:01:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:54,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:54,115 INFO L521 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] [2021-06-05 06:01:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable950,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:54,316 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 676724705, now seen corresponding path program 124 times [2021-06-05 06:01:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564751974] [2021-06-05 06:01:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:54,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:54,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564751974] [2021-06-05 06:01:54,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564751974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:54,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308959448] [2021-06-05 06:01:54,666 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 [2021-06-05 06:01:54,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:01:54,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:01:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308959448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:55,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:55,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:01:55,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846150156] [2021-06-05 06:01:55,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:01:55,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:55,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:01:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:01:55,532 INFO L87 Difference]: Start difference. First operand 10979 states and 36721 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) [2021-06-05 06:01:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:57,112 INFO L93 Difference]: Finished difference Result 13498 states and 43973 transitions. [2021-06-05 06:01:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:01:57,112 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 [2021-06-05 06:01:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:57,134 INFO L225 Difference]: With dead ends: 13498 [2021-06-05 06:01:57,134 INFO L226 Difference]: Without dead ends: 13410 [2021-06-05 06:01:57,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1817.9ms TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:01:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13410 states. [2021-06-05 06:01:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13410 to 11003. [2021-06-05 06:01:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11003 states, 11002 states have (on average 3.3449372841301583) internal successors, (36801), 11002 states have internal predecessors, (36801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11003 states to 11003 states and 36801 transitions. [2021-06-05 06:01:57,315 INFO L78 Accepts]: Start accepts. Automaton has 11003 states and 36801 transitions. Word has length 36 [2021-06-05 06:01:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:57,315 INFO L482 AbstractCegarLoop]: Abstraction has 11003 states and 36801 transitions. [2021-06-05 06:01:57,315 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) [2021-06-05 06:01:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 11003 states and 36801 transitions. [2021-06-05 06:01:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:01:57,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:57,329 INFO L521 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] [2021-06-05 06:01:57,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 06:01:57,533 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1350521119, now seen corresponding path program 125 times [2021-06-05 06:01:57,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:57,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739902953] [2021-06-05 06:01:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:01:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:57,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:01:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739902953] [2021-06-05 06:01:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739902953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962798213] [2021-06-05 06:01:57,973 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 [2021-06-05 06:01:58,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:01:58,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:01:58,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:01:58,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:01:58,438 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 06:01:59,066 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 06:01:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:01:59,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962798213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:01:59,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:01:59,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:01:59,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404627020] [2021-06-05 06:01:59,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:01:59,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:01:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:01:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:01:59,226 INFO L87 Difference]: Start difference. First operand 11003 states and 36801 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) [2021-06-05 06:02:01,797 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 06:02:02,113 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 06:02:02,373 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 06:02:02,530 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 06:02:02,731 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 06:02:02,969 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 06:02:03,172 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-06-05 06:02:03,385 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 06:02:03,641 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-06-05 06:02:03,933 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 06:02:04,186 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-05 06:02:04,438 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 06:02:04,816 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 06:02:04,965 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2021-06-05 06:02:05,130 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-06-05 06:02:05,421 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-06-05 06:02:05,638 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-06-05 06:02:05,831 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-06-05 06:02:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:06,144 INFO L93 Difference]: Finished difference Result 17246 states and 55714 transitions. [2021-06-05 06:02:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:02:06,144 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 [2021-06-05 06:02:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:06,171 INFO L225 Difference]: With dead ends: 17246 [2021-06-05 06:02:06,172 INFO L226 Difference]: Without dead ends: 17157 [2021-06-05 06:02:06,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 6788.5ms TimeCoverageRelationStatistics Valid=1239, Invalid=7881, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 06:02:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17157 states. [2021-06-05 06:02:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17157 to 11047. [2021-06-05 06:02:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 3.3455549520188304) internal successors, (36955), 11046 states have internal predecessors, (36955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 36955 transitions. [2021-06-05 06:02:06,470 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 36955 transitions. Word has length 36 [2021-06-05 06:02:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:06,470 INFO L482 AbstractCegarLoop]: Abstraction has 11047 states and 36955 transitions. [2021-06-05 06:02:06,471 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) [2021-06-05 06:02:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 36955 transitions. [2021-06-05 06:02:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:06,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:06,484 INFO L521 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] [2021-06-05 06:02:06,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 06:02:06,685 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1828307351, now seen corresponding path program 126 times [2021-06-05 06:02:06,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:06,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612836343] [2021-06-05 06:02:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:07,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:07,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612836343] [2021-06-05 06:02:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612836343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:07,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262322931] [2021-06-05 06:02:07,033 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 [2021-06-05 06:02:07,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:02:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:07,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:02:07,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:07,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262322931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:07,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:07,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:02:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950230329] [2021-06-05 06:02:07,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:02:07,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:07,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:02:07,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:02:07,769 INFO L87 Difference]: Start difference. First operand 11047 states and 36955 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) [2021-06-05 06:02:09,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:09,824 INFO L93 Difference]: Finished difference Result 13682 states and 44967 transitions. [2021-06-05 06:02:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:02:09,825 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 [2021-06-05 06:02:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:09,847 INFO L225 Difference]: With dead ends: 13682 [2021-06-05 06:02:09,848 INFO L226 Difference]: Without dead ends: 13562 [2021-06-05 06:02:09,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1894.6ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:02:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13562 states. [2021-06-05 06:02:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13562 to 11055. [2021-06-05 06:02:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 3.345847656956758) internal successors, (36985), 11054 states have internal predecessors, (36985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 36985 transitions. [2021-06-05 06:02:10,032 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 36985 transitions. Word has length 36 [2021-06-05 06:02:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:10,032 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 36985 transitions. [2021-06-05 06:02:10,032 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) [2021-06-05 06:02:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 36985 transitions. [2021-06-05 06:02:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:10,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:10,046 INFO L521 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] [2021-06-05 06:02:10,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-06-05 06:02:10,246 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash -555373643, now seen corresponding path program 127 times [2021-06-05 06:02:10,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:10,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652461031] [2021-06-05 06:02:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:10,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:10,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652461031] [2021-06-05 06:02:10,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652461031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:10,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933682780] [2021-06-05 06:02:10,659 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 [2021-06-05 06:02:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:10,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:02:10,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:11,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933682780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:11,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:11,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:02:11,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535092152] [2021-06-05 06:02:11,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:02:11,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:11,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:02:11,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:02:11,509 INFO L87 Difference]: Start difference. First operand 11055 states and 36985 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) [2021-06-05 06:02:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:13,478 INFO L93 Difference]: Finished difference Result 12746 states and 42062 transitions. [2021-06-05 06:02:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:02:13,479 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 [2021-06-05 06:02:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:13,500 INFO L225 Difference]: With dead ends: 12746 [2021-06-05 06:02:13,500 INFO L226 Difference]: Without dead ends: 12626 [2021-06-05 06:02:13,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1809.3ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:02:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12626 states. [2021-06-05 06:02:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 11067. [2021-06-05 06:02:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11067 states, 11066 states have (on average 3.345653352611603) internal successors, (37023), 11066 states have internal predecessors, (37023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 37023 transitions. [2021-06-05 06:02:13,697 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 37023 transitions. Word has length 36 [2021-06-05 06:02:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:13,697 INFO L482 AbstractCegarLoop]: Abstraction has 11067 states and 37023 transitions. [2021-06-05 06:02:13,697 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) [2021-06-05 06:02:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 37023 transitions. [2021-06-05 06:02:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:13,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:13,710 INFO L521 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] [2021-06-05 06:02:13,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-05 06:02:13,911 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash -625483679, now seen corresponding path program 128 times [2021-06-05 06:02:13,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:13,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704701248] [2021-06-05 06:02:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:14,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704701248] [2021-06-05 06:02:14,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704701248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614683908] [2021-06-05 06:02:14,263 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 [2021-06-05 06:02:14,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:02:14,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:02:14,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614683908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:15,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:15,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:02:15,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472536270] [2021-06-05 06:02:15,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:02:15,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:15,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:02:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:02:15,051 INFO L87 Difference]: Start difference. First operand 11067 states and 37023 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) [2021-06-05 06:02:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:16,379 INFO L93 Difference]: Finished difference Result 12421 states and 41125 transitions. [2021-06-05 06:02:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:02:16,379 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 [2021-06-05 06:02:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:16,402 INFO L225 Difference]: With dead ends: 12421 [2021-06-05 06:02:16,402 INFO L226 Difference]: Without dead ends: 12301 [2021-06-05 06:02:16,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1579.9ms TimeCoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:02:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2021-06-05 06:02:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 11071. [2021-06-05 06:02:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 11070 states have (on average 3.345528455284553) internal successors, (37035), 11070 states have internal predecessors, (37035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 37035 transitions. [2021-06-05 06:02:16,593 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 37035 transitions. Word has length 36 [2021-06-05 06:02:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:16,594 INFO L482 AbstractCegarLoop]: Abstraction has 11071 states and 37035 transitions. [2021-06-05 06:02:16,594 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) [2021-06-05 06:02:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 37035 transitions. [2021-06-05 06:02:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:16,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:16,607 INFO L521 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] [2021-06-05 06:02:16,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 06:02:16,807 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1410045579, now seen corresponding path program 129 times [2021-06-05 06:02:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:16,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747161374] [2021-06-05 06:02:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:17,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:17,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747161374] [2021-06-05 06:02:17,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747161374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:17,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111878242] [2021-06-05 06:02:17,136 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 [2021-06-05 06:02:17,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:02:17,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:02:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:17,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111878242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:17,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:17,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:02:17,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445093140] [2021-06-05 06:02:17,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:02:17,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:17,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:02:17,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:02:17,877 INFO L87 Difference]: Start difference. First operand 11071 states and 37035 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) [2021-06-05 06:02:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:20,839 INFO L93 Difference]: Finished difference Result 16445 states and 53005 transitions. [2021-06-05 06:02:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:02:20,839 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 [2021-06-05 06:02:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:20,864 INFO L225 Difference]: With dead ends: 16445 [2021-06-05 06:02:20,864 INFO L226 Difference]: Without dead ends: 16277 [2021-06-05 06:02:20,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2730.4ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:02:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2021-06-05 06:02:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 11152. [2021-06-05 06:02:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11152 states, 11151 states have (on average 3.347861178369653) internal successors, (37332), 11151 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11152 states to 11152 states and 37332 transitions. [2021-06-05 06:02:21,087 INFO L78 Accepts]: Start accepts. Automaton has 11152 states and 37332 transitions. Word has length 36 [2021-06-05 06:02:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:21,087 INFO L482 AbstractCegarLoop]: Abstraction has 11152 states and 37332 transitions. [2021-06-05 06:02:21,087 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) [2021-06-05 06:02:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 11152 states and 37332 transitions. [2021-06-05 06:02:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:21,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:21,100 INFO L521 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] [2021-06-05 06:02:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-05 06:02:21,301 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash 855388701, now seen corresponding path program 130 times [2021-06-05 06:02:21,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:21,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398880167] [2021-06-05 06:02:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:21,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398880167] [2021-06-05 06:02:21,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398880167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097663196] [2021-06-05 06:02:21,660 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 [2021-06-05 06:02:21,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:02:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:02:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:22,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097663196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:22,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:22,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:02:22,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011721305] [2021-06-05 06:02:22,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:02:22,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:02:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:02:22,439 INFO L87 Difference]: Start difference. First operand 11152 states and 37332 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) [2021-06-05 06:02:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:25,444 INFO L93 Difference]: Finished difference Result 16705 states and 53815 transitions. [2021-06-05 06:02:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:02:25,444 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 [2021-06-05 06:02:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:25,470 INFO L225 Difference]: With dead ends: 16705 [2021-06-05 06:02:25,470 INFO L226 Difference]: Without dead ends: 16527 [2021-06-05 06:02:25,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2683.1ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:02:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16527 states. [2021-06-05 06:02:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16527 to 11192. [2021-06-05 06:02:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11192 states, 11191 states have (on average 3.348136895719775) internal successors, (37469), 11191 states have internal predecessors, (37469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11192 states to 11192 states and 37469 transitions. [2021-06-05 06:02:25,694 INFO L78 Accepts]: Start accepts. Automaton has 11192 states and 37469 transitions. Word has length 36 [2021-06-05 06:02:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:25,694 INFO L482 AbstractCegarLoop]: Abstraction has 11192 states and 37469 transitions. [2021-06-05 06:02:25,694 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) [2021-06-05 06:02:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11192 states and 37469 transitions. [2021-06-05 06:02:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:25,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:25,707 INFO L521 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] [2021-06-05 06:02:25,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 06:02:25,907 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash -963821215, now seen corresponding path program 131 times [2021-06-05 06:02:25,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:25,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399402854] [2021-06-05 06:02:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:26,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399402854] [2021-06-05 06:02:26,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399402854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647707250] [2021-06-05 06:02:26,256 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 [2021-06-05 06:02:26,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:02:26,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:02:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:27,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647707250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:27,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:27,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:02:27,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040676093] [2021-06-05 06:02:27,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:02:27,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:02:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:02:27,035 INFO L87 Difference]: Start difference. First operand 11192 states and 37469 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) [2021-06-05 06:02:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:28,352 INFO L93 Difference]: Finished difference Result 12536 states and 41555 transitions. [2021-06-05 06:02:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:02:28,353 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 [2021-06-05 06:02:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:28,375 INFO L225 Difference]: With dead ends: 12536 [2021-06-05 06:02:28,375 INFO L226 Difference]: Without dead ends: 12456 [2021-06-05 06:02:28,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1444.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:02:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12456 states. [2021-06-05 06:02:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12456 to 11180. [2021-06-05 06:02:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 3.3479738795956706) internal successors, (37427), 11179 states have internal predecessors, (37427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 37427 transitions. [2021-06-05 06:02:28,571 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 37427 transitions. Word has length 36 [2021-06-05 06:02:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:28,571 INFO L482 AbstractCegarLoop]: Abstraction has 11180 states and 37427 transitions. [2021-06-05 06:02:28,571 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) [2021-06-05 06:02:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 37427 transitions. [2021-06-05 06:02:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:28,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:28,585 INFO L521 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] [2021-06-05 06:02:28,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1045,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:28,786 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1461646837, now seen corresponding path program 132 times [2021-06-05 06:02:28,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:28,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789740064] [2021-06-05 06:02:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:29,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:29,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789740064] [2021-06-05 06:02:29,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789740064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:29,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340601378] [2021-06-05 06:02:29,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:29,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:02:29,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:02:29,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:29,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340601378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:29,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:29,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:02:29,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811992037] [2021-06-05 06:02:29,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:02:29,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:29,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:02:29,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:02:29,802 INFO L87 Difference]: Start difference. First operand 11180 states and 37427 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) [2021-06-05 06:02:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:32,320 INFO L93 Difference]: Finished difference Result 14457 states and 47364 transitions. [2021-06-05 06:02:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:02:32,320 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 [2021-06-05 06:02:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:32,342 INFO L225 Difference]: With dead ends: 14457 [2021-06-05 06:02:32,342 INFO L226 Difference]: Without dead ends: 14337 [2021-06-05 06:02:32,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2027.1ms TimeCoverageRelationStatistics Valid=529, Invalid=3377, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:02:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14337 states. [2021-06-05 06:02:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14337 to 11250. [2021-06-05 06:02:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.345808516312561) internal successors, (37637), 11249 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 37637 transitions. [2021-06-05 06:02:32,529 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 37637 transitions. Word has length 36 [2021-06-05 06:02:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:32,529 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 37637 transitions. [2021-06-05 06:02:32,529 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) [2021-06-05 06:02:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 37637 transitions. [2021-06-05 06:02:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:32,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:32,543 INFO L521 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] [2021-06-05 06:02:32,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:32,744 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:32,744 INFO L82 PathProgramCache]: Analyzing trace with hash 623719669, now seen corresponding path program 133 times [2021-06-05 06:02:32,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:32,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105238454] [2021-06-05 06:02:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:33,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:33,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105238454] [2021-06-05 06:02:33,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105238454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525431463] [2021-06-05 06:02:33,006 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 [2021-06-05 06:02:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:02:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:33,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525431463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:33,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:33,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:02:33,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927325310] [2021-06-05 06:02:33,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:02:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:02:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:02:33,636 INFO L87 Difference]: Start difference. First operand 11250 states and 37637 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) [2021-06-05 06:02:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:35,584 INFO L93 Difference]: Finished difference Result 12509 states and 40981 transitions. [2021-06-05 06:02:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:02:35,585 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 [2021-06-05 06:02:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:35,604 INFO L225 Difference]: With dead ends: 12509 [2021-06-05 06:02:35,604 INFO L226 Difference]: Without dead ends: 12309 [2021-06-05 06:02:35,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1675.9ms TimeCoverageRelationStatistics Valid=601, Invalid=3431, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:02:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12309 states. [2021-06-05 06:02:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12309 to 11218. [2021-06-05 06:02:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11218 states, 11217 states have (on average 3.3482214495854508) internal successors, (37557), 11217 states have internal predecessors, (37557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11218 states to 11218 states and 37557 transitions. [2021-06-05 06:02:35,801 INFO L78 Accepts]: Start accepts. Automaton has 11218 states and 37557 transitions. Word has length 36 [2021-06-05 06:02:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:35,801 INFO L482 AbstractCegarLoop]: Abstraction has 11218 states and 37557 transitions. [2021-06-05 06:02:35,801 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) [2021-06-05 06:02:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11218 states and 37557 transitions. [2021-06-05 06:02:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:35,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:35,816 INFO L521 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] [2021-06-05 06:02:36,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1060 [2021-06-05 06:02:36,017 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 301799153, now seen corresponding path program 134 times [2021-06-05 06:02:36,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:36,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485463796] [2021-06-05 06:02:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:36,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:36,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485463796] [2021-06-05 06:02:36,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485463796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063985700] [2021-06-05 06:02:36,267 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 [2021-06-05 06:02:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:02:36,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:02:36,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:36,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063985700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:36,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:36,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:02:36,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394196712] [2021-06-05 06:02:36,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:02:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:02:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:02:36,875 INFO L87 Difference]: Start difference. First operand 11218 states and 37557 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) [2021-06-05 06:02:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:39,748 INFO L93 Difference]: Finished difference Result 12941 states and 42368 transitions. [2021-06-05 06:02:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:02:39,749 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 [2021-06-05 06:02:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:39,768 INFO L225 Difference]: With dead ends: 12941 [2021-06-05 06:02:39,768 INFO L226 Difference]: Without dead ends: 12710 [2021-06-05 06:02:39,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2160.9ms TimeCoverageRelationStatistics Valid=718, Invalid=4832, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:02:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-06-05 06:02:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 11268. [2021-06-05 06:02:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 11267 states have (on average 3.3473861720067455) internal successors, (37715), 11267 states have internal predecessors, (37715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 37715 transitions. [2021-06-05 06:02:39,955 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 37715 transitions. Word has length 36 [2021-06-05 06:02:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:39,955 INFO L482 AbstractCegarLoop]: Abstraction has 11268 states and 37715 transitions. [2021-06-05 06:02:39,955 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) [2021-06-05 06:02:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 37715 transitions. [2021-06-05 06:02:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:39,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:39,969 INFO L521 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] [2021-06-05 06:02:40,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:40,170 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1738497013, now seen corresponding path program 135 times [2021-06-05 06:02:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:40,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949034560] [2021-06-05 06:02:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:40,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:40,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949034560] [2021-06-05 06:02:40,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949034560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:40,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035634413] [2021-06-05 06:02:40,467 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 [2021-06-05 06:02:40,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:02:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:02:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:41,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035634413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:41,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:41,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-06-05 06:02:41,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836638166] [2021-06-05 06:02:41,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:02:41,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:02:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:02:41,114 INFO L87 Difference]: Start difference. First operand 11268 states and 37715 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) [2021-06-05 06:02:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:46,391 INFO L93 Difference]: Finished difference Result 16947 states and 54511 transitions. [2021-06-05 06:02:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 06:02:46,392 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 [2021-06-05 06:02:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:46,417 INFO L225 Difference]: With dead ends: 16947 [2021-06-05 06:02:46,418 INFO L226 Difference]: Without dead ends: 16668 [2021-06-05 06:02:46,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4075 ImplicationChecksByTransitivity, 4109.8ms TimeCoverageRelationStatistics Valid=1293, Invalid=11139, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 06:02:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16668 states. [2021-06-05 06:02:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16668 to 11286. [2021-06-05 06:02:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11286 states, 11285 states have (on average 3.347718210013292) internal successors, (37779), 11285 states have internal predecessors, (37779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11286 states to 11286 states and 37779 transitions. [2021-06-05 06:02:46,641 INFO L78 Accepts]: Start accepts. Automaton has 11286 states and 37779 transitions. Word has length 36 [2021-06-05 06:02:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:46,641 INFO L482 AbstractCegarLoop]: Abstraction has 11286 states and 37779 transitions. [2021-06-05 06:02:46,641 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) [2021-06-05 06:02:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 11286 states and 37779 transitions. [2021-06-05 06:02:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:46,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:46,656 INFO L521 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] [2021-06-05 06:02:46,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 06:02:46,856 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:46,856 INFO L82 PathProgramCache]: Analyzing trace with hash -386278499, now seen corresponding path program 136 times [2021-06-05 06:02:46,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:46,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203179571] [2021-06-05 06:02:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203179571] [2021-06-05 06:02:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203179571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112537547] [2021-06-05 06:02:47,200 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 [2021-06-05 06:02:47,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:02:47,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:02:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:47,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112537547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:47,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:47,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:02:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688132929] [2021-06-05 06:02:47,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:02:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:02:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:02:47,938 INFO L87 Difference]: Start difference. First operand 11286 states and 37779 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) [2021-06-05 06:02:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:49,811 INFO L93 Difference]: Finished difference Result 14432 states and 47377 transitions. [2021-06-05 06:02:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:02:49,811 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 [2021-06-05 06:02:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:49,833 INFO L225 Difference]: With dead ends: 14432 [2021-06-05 06:02:49,834 INFO L226 Difference]: Without dead ends: 14343 [2021-06-05 06:02:49,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1985.0ms TimeCoverageRelationStatistics Valid=581, Invalid=3451, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:02:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2021-06-05 06:02:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 11334. [2021-06-05 06:02:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11334 states, 11333 states have (on average 3.3490690902673608) internal successors, (37955), 11333 states have internal predecessors, (37955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11334 states to 11334 states and 37955 transitions. [2021-06-05 06:02:50,018 INFO L78 Accepts]: Start accepts. Automaton has 11334 states and 37955 transitions. Word has length 36 [2021-06-05 06:02:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:50,018 INFO L482 AbstractCegarLoop]: Abstraction has 11334 states and 37955 transitions. [2021-06-05 06:02:50,019 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) [2021-06-05 06:02:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 11334 states and 37955 transitions. [2021-06-05 06:02:50,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:50,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:50,032 INFO L521 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] [2021-06-05 06:02:50,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 06:02:50,232 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1224205667, now seen corresponding path program 137 times [2021-06-05 06:02:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:50,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986937361] [2021-06-05 06:02:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:50,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:50,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986937361] [2021-06-05 06:02:50,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986937361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:50,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70113923] [2021-06-05 06:02:50,479 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 [2021-06-05 06:02:50,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:02:50,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:02:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70113923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:51,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:51,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:02:51,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425098984] [2021-06-05 06:02:51,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:02:51,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:02:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:02:51,102 INFO L87 Difference]: Start difference. First operand 11334 states and 37955 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) [2021-06-05 06:02:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:53,334 INFO L93 Difference]: Finished difference Result 12417 states and 40850 transitions. [2021-06-05 06:02:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:02:53,335 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 [2021-06-05 06:02:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:53,354 INFO L225 Difference]: With dead ends: 12417 [2021-06-05 06:02:53,355 INFO L226 Difference]: Without dead ends: 12241 [2021-06-05 06:02:53,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2007.6ms TimeCoverageRelationStatistics Valid=790, Invalid=4322, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:02:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-06-05 06:02:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11288. [2021-06-05 06:02:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11288 states, 11287 states have (on average 3.3512004961460087) internal successors, (37825), 11287 states have internal predecessors, (37825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11288 states to 11288 states and 37825 transitions. [2021-06-05 06:02:53,547 INFO L78 Accepts]: Start accepts. Automaton has 11288 states and 37825 transitions. Word has length 36 [2021-06-05 06:02:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:53,547 INFO L482 AbstractCegarLoop]: Abstraction has 11288 states and 37825 transitions. [2021-06-05 06:02:53,547 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) [2021-06-05 06:02:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 11288 states and 37825 transitions. [2021-06-05 06:02:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:53,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:53,561 INFO L521 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] [2021-06-05 06:02:53,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 06:02:53,761 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1902267487, now seen corresponding path program 138 times [2021-06-05 06:02:53,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:53,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522110095] [2021-06-05 06:02:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:54,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:54,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522110095] [2021-06-05 06:02:54,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522110095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:54,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036272156] [2021-06-05 06:02:54,132 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:54,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:02:54,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:02:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:54,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036272156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:54,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:54,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:02:54,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533699441] [2021-06-05 06:02:54,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:02:54,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:02:54,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:02:54,788 INFO L87 Difference]: Start difference. First operand 11288 states and 37825 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) [2021-06-05 06:02:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:58,971 INFO L93 Difference]: Finished difference Result 19538 states and 62921 transitions. [2021-06-05 06:02:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:02:58,972 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 [2021-06-05 06:02:58,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:59,004 INFO L225 Difference]: With dead ends: 19538 [2021-06-05 06:02:59,004 INFO L226 Difference]: Without dead ends: 19424 [2021-06-05 06:02:59,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 3681.4ms TimeCoverageRelationStatistics Valid=1306, Invalid=6884, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 06:02:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19424 states. [2021-06-05 06:02:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19424 to 11369. [2021-06-05 06:02:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 3.3516889514426462) internal successors, (38102), 11368 states have internal predecessors, (38102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 38102 transitions. [2021-06-05 06:02:59,247 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 38102 transitions. Word has length 36 [2021-06-05 06:02:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:59,247 INFO L482 AbstractCegarLoop]: Abstraction has 11369 states and 38102 transitions. [2021-06-05 06:02:59,247 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) [2021-06-05 06:02:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 38102 transitions. [2021-06-05 06:02:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:02:59,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:59,261 INFO L521 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] [2021-06-05 06:02:59,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 06:02:59,461 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash -484783711, now seen corresponding path program 139 times [2021-06-05 06:02:59,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:59,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727942525] [2021-06-05 06:02:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:59,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:59,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727942525] [2021-06-05 06:02:59,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727942525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:59,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188740003] [2021-06-05 06:02:59,729 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 [2021-06-05 06:02:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:02:59,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:00,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188740003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:00,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:00,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:03:00,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80929054] [2021-06-05 06:03:00,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:03:00,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:03:00,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:03:00,357 INFO L87 Difference]: Start difference. First operand 11369 states and 38102 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) [2021-06-05 06:03:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:03,347 INFO L93 Difference]: Finished difference Result 16547 states and 53487 transitions. [2021-06-05 06:03:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 06:03:03,347 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 [2021-06-05 06:03:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:03,372 INFO L225 Difference]: With dead ends: 16547 [2021-06-05 06:03:03,372 INFO L226 Difference]: Without dead ends: 16315 [2021-06-05 06:03:03,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2566 ImplicationChecksByTransitivity, 2702.8ms TimeCoverageRelationStatistics Valid=1155, Invalid=6855, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 06:03:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16315 states. [2021-06-05 06:03:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16315 to 11361. [2021-06-05 06:03:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11361 states, 11360 states have (on average 3.351232394366197) internal successors, (38070), 11360 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11361 states to 11361 states and 38070 transitions. [2021-06-05 06:03:03,619 INFO L78 Accepts]: Start accepts. Automaton has 11361 states and 38070 transitions. Word has length 36 [2021-06-05 06:03:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:03,619 INFO L482 AbstractCegarLoop]: Abstraction has 11361 states and 38070 transitions. [2021-06-05 06:03:03,619 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) [2021-06-05 06:03:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11361 states and 38070 transitions. [2021-06-05 06:03:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:03,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:03,633 INFO L521 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] [2021-06-05 06:03:03,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:03,834 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash 507709853, now seen corresponding path program 140 times [2021-06-05 06:03:03,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:03,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050030312] [2021-06-05 06:03:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:04,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050030312] [2021-06-05 06:03:04,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050030312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706657462] [2021-06-05 06:03:04,107 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 [2021-06-05 06:03:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:03:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:03:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:04,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706657462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:04,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:04,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:03:04,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434739408] [2021-06-05 06:03:04,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:03:04,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:04,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:03:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:03:04,703 INFO L87 Difference]: Start difference. First operand 11361 states and 38070 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) [2021-06-05 06:03:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:09,791 INFO L93 Difference]: Finished difference Result 17575 states and 56464 transitions. [2021-06-05 06:03:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 06:03:09,792 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 [2021-06-05 06:03:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:09,816 INFO L225 Difference]: With dead ends: 17575 [2021-06-05 06:03:09,816 INFO L226 Difference]: Without dead ends: 17288 [2021-06-05 06:03:09,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 3864.7ms TimeCoverageRelationStatistics Valid=1462, Invalid=10094, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 06:03:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17288 states. [2021-06-05 06:03:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17288 to 11297. [2021-06-05 06:03:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11297 states, 11296 states have (on average 3.3473796033994336) internal successors, (37812), 11296 states have internal predecessors, (37812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11297 states to 11297 states and 37812 transitions. [2021-06-05 06:03:10,022 INFO L78 Accepts]: Start accepts. Automaton has 11297 states and 37812 transitions. Word has length 36 [2021-06-05 06:03:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:10,022 INFO L482 AbstractCegarLoop]: Abstraction has 11297 states and 37812 transitions. [2021-06-05 06:03:10,022 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) [2021-06-05 06:03:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 11297 states and 37812 transitions. [2021-06-05 06:03:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:10,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:10,036 INFO L521 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] [2021-06-05 06:03:10,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:10,236 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash -4354079, now seen corresponding path program 141 times [2021-06-05 06:03:10,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:10,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765041362] [2021-06-05 06:03:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:10,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765041362] [2021-06-05 06:03:10,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765041362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919081787] [2021-06-05 06:03:10,628 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 [2021-06-05 06:03:10,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:03:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:03:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:11,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919081787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:11,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:11,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:03:11,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482072417] [2021-06-05 06:03:11,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:03:11,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:03:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:03:11,280 INFO L87 Difference]: Start difference. First operand 11297 states and 37812 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) [2021-06-05 06:03:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:14,331 INFO L93 Difference]: Finished difference Result 20632 states and 67023 transitions. [2021-06-05 06:03:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:03:14,331 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 [2021-06-05 06:03:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:14,363 INFO L225 Difference]: With dead ends: 20632 [2021-06-05 06:03:14,363 INFO L226 Difference]: Without dead ends: 20488 [2021-06-05 06:03:14,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2876.1ms TimeCoverageRelationStatistics Valid=1043, Invalid=4809, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:03:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20488 states. [2021-06-05 06:03:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20488 to 11271. [2021-06-05 06:03:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11271 states, 11270 states have (on average 3.345785270629991) internal successors, (37707), 11270 states have internal predecessors, (37707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 37707 transitions. [2021-06-05 06:03:14,595 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 37707 transitions. Word has length 36 [2021-06-05 06:03:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:14,595 INFO L482 AbstractCegarLoop]: Abstraction has 11271 states and 37707 transitions. [2021-06-05 06:03:14,595 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) [2021-06-05 06:03:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 37707 transitions. [2021-06-05 06:03:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:14,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:14,608 INFO L521 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] [2021-06-05 06:03:14,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1101,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:14,809 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:14,809 INFO L82 PathProgramCache]: Analyzing trace with hash 720683361, now seen corresponding path program 142 times [2021-06-05 06:03:14,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:14,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002158049] [2021-06-05 06:03:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:15,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:15,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002158049] [2021-06-05 06:03:15,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002158049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:15,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943604047] [2021-06-05 06:03:15,115 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 [2021-06-05 06:03:15,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:03:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:03:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943604047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:15,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:15,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:03:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824312252] [2021-06-05 06:03:15,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:03:15,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:03:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:03:15,773 INFO L87 Difference]: Start difference. First operand 11271 states and 37707 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) [2021-06-05 06:03:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:17,545 INFO L93 Difference]: Finished difference Result 15161 states and 49899 transitions. [2021-06-05 06:03:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:03:17,546 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 [2021-06-05 06:03:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:17,569 INFO L225 Difference]: With dead ends: 15161 [2021-06-05 06:03:17,569 INFO L226 Difference]: Without dead ends: 15041 [2021-06-05 06:03:17,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1585.4ms TimeCoverageRelationStatistics Valid=516, Invalid=2346, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:03:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15041 states. [2021-06-05 06:03:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15041 to 11267. [2021-06-05 06:03:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 11266 states have (on average 3.3459080418959704) internal successors, (37695), 11266 states have internal predecessors, (37695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 37695 transitions. [2021-06-05 06:03:17,805 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 37695 transitions. Word has length 36 [2021-06-05 06:03:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:17,805 INFO L482 AbstractCegarLoop]: Abstraction has 11267 states and 37695 transitions. [2021-06-05 06:03:17,805 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) [2021-06-05 06:03:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 37695 transitions. [2021-06-05 06:03:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:17,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:17,818 INFO L521 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] [2021-06-05 06:03:18,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-05 06:03:18,018 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash -852237963, now seen corresponding path program 143 times [2021-06-05 06:03:18,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:18,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480505676] [2021-06-05 06:03:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:18,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480505676] [2021-06-05 06:03:18,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480505676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073511654] [2021-06-05 06:03:18,259 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 [2021-06-05 06:03:18,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:03:18,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:03:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:19,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073511654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:19,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:19,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:03:19,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708112475] [2021-06-05 06:03:19,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:03:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:03:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:03:19,028 INFO L87 Difference]: Start difference. First operand 11267 states and 37695 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) [2021-06-05 06:03:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:21,526 INFO L93 Difference]: Finished difference Result 13598 states and 44373 transitions. [2021-06-05 06:03:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:03:21,526 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 [2021-06-05 06:03:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:21,547 INFO L225 Difference]: With dead ends: 13598 [2021-06-05 06:03:21,547 INFO L226 Difference]: Without dead ends: 13285 [2021-06-05 06:03:21,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 2210.9ms TimeCoverageRelationStatistics Valid=849, Invalid=4553, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:03:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13285 states. [2021-06-05 06:03:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13285 to 11259. [2021-06-05 06:03:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11259 states, 11258 states have (on average 3.346686800497424) internal successors, (37677), 11258 states have internal predecessors, (37677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11259 states to 11259 states and 37677 transitions. [2021-06-05 06:03:21,791 INFO L78 Accepts]: Start accepts. Automaton has 11259 states and 37677 transitions. Word has length 36 [2021-06-05 06:03:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:21,791 INFO L482 AbstractCegarLoop]: Abstraction has 11259 states and 37677 transitions. [2021-06-05 06:03:21,791 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) [2021-06-05 06:03:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 11259 states and 37677 transitions. [2021-06-05 06:03:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:21,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:21,804 INFO L521 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] [2021-06-05 06:03:22,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1118 [2021-06-05 06:03:22,005 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash -63878539, now seen corresponding path program 144 times [2021-06-05 06:03:22,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:22,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843973145] [2021-06-05 06:03:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:22,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:22,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843973145] [2021-06-05 06:03:22,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843973145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:22,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927437229] [2021-06-05 06:03:22,247 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 [2021-06-05 06:03:22,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:03:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:22,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:03:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:22,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927437229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:22,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:22,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:03:22,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704592239] [2021-06-05 06:03:22,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:03:22,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:03:22,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:03:22,799 INFO L87 Difference]: Start difference. First operand 11259 states and 37677 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) [2021-06-05 06:03:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:25,812 INFO L93 Difference]: Finished difference Result 16239 states and 52443 transitions. [2021-06-05 06:03:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:03:25,812 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 [2021-06-05 06:03:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:25,838 INFO L225 Difference]: With dead ends: 16239 [2021-06-05 06:03:25,838 INFO L226 Difference]: Without dead ends: 16041 [2021-06-05 06:03:25,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2465.3ms TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:03:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16041 states. [2021-06-05 06:03:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16041 to 11281. [2021-06-05 06:03:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11281 states, 11280 states have (on average 3.3474290780141844) internal successors, (37759), 11280 states have internal predecessors, (37759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11281 states to 11281 states and 37759 transitions. [2021-06-05 06:03:26,100 INFO L78 Accepts]: Start accepts. Automaton has 11281 states and 37759 transitions. Word has length 36 [2021-06-05 06:03:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:26,100 INFO L482 AbstractCegarLoop]: Abstraction has 11281 states and 37759 transitions. [2021-06-05 06:03:26,101 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) [2021-06-05 06:03:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 11281 states and 37759 transitions. [2021-06-05 06:03:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:26,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:26,117 INFO L521 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] [2021-06-05 06:03:26,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-05 06:03:26,321 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2093411555, now seen corresponding path program 145 times [2021-06-05 06:03:26,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:26,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219281959] [2021-06-05 06:03:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:26,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:26,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219281959] [2021-06-05 06:03:26,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219281959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:26,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550475626] [2021-06-05 06:03:26,569 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 [2021-06-05 06:03:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:26,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:03:26,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:27,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550475626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:27,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:27,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:03:27,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669271198] [2021-06-05 06:03:27,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:03:27,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:27,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:03:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:03:27,170 INFO L87 Difference]: Start difference. First operand 11281 states and 37759 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) [2021-06-05 06:03:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:29,897 INFO L93 Difference]: Finished difference Result 16777 states and 54183 transitions. [2021-06-05 06:03:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:03:29,897 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 [2021-06-05 06:03:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:29,923 INFO L225 Difference]: With dead ends: 16777 [2021-06-05 06:03:29,923 INFO L226 Difference]: Without dead ends: 16575 [2021-06-05 06:03:29,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2461.5ms TimeCoverageRelationStatistics Valid=1047, Invalid=4959, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:03:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-06-05 06:03:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 11178. [2021-06-05 06:03:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 11177 states have (on average 3.34633622617876) internal successors, (37402), 11177 states have internal predecessors, (37402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 37402 transitions. [2021-06-05 06:03:30,191 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 37402 transitions. Word has length 36 [2021-06-05 06:03:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:30,191 INFO L482 AbstractCegarLoop]: Abstraction has 11178 states and 37402 transitions. [2021-06-05 06:03:30,191 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) [2021-06-05 06:03:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 37402 transitions. [2021-06-05 06:03:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:30,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:30,204 INFO L521 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] [2021-06-05 06:03:30,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-06-05 06:03:30,405 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:30,405 INFO L82 PathProgramCache]: Analyzing trace with hash 851216925, now seen corresponding path program 146 times [2021-06-05 06:03:30,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:30,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730758377] [2021-06-05 06:03:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:30,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:30,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730758377] [2021-06-05 06:03:30,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730758377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:30,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369649885] [2021-06-05 06:03:30,670 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 [2021-06-05 06:03:30,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:03:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:03:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:31,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369649885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:31,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:31,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:03:31,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462524438] [2021-06-05 06:03:31,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:03:31,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:31,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:03:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:03:31,223 INFO L87 Difference]: Start difference. First operand 11178 states and 37402 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) [2021-06-05 06:03:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:32,607 INFO L93 Difference]: Finished difference Result 17045 states and 56033 transitions. [2021-06-05 06:03:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:03:32,607 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 [2021-06-05 06:03:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:32,634 INFO L225 Difference]: With dead ends: 17045 [2021-06-05 06:03:32,635 INFO L226 Difference]: Without dead ends: 16965 [2021-06-05 06:03:32,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1287.7ms TimeCoverageRelationStatistics Valid=499, Invalid=2257, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:03:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16965 states. [2021-06-05 06:03:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16965 to 11135. [2021-06-05 06:03:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 3.34560804742231) internal successors, (37250), 11134 states have internal predecessors, (37250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 37250 transitions. [2021-06-05 06:03:32,864 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 37250 transitions. Word has length 36 [2021-06-05 06:03:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:32,864 INFO L482 AbstractCegarLoop]: Abstraction has 11135 states and 37250 transitions. [2021-06-05 06:03:32,864 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) [2021-06-05 06:03:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 37250 transitions. [2021-06-05 06:03:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:32,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:32,877 INFO L521 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] [2021-06-05 06:03:33,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:33,077 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash 805896121, now seen corresponding path program 147 times [2021-06-05 06:03:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:33,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615372651] [2021-06-05 06:03:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:33,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:33,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615372651] [2021-06-05 06:03:33,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615372651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:33,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615313650] [2021-06-05 06:03:33,380 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 [2021-06-05 06:03:33,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:03:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:03:33,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615313650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:33,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:33,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:03:33,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379357151] [2021-06-05 06:03:33,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:03:33,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:33,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:03:33,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:03:33,987 INFO L87 Difference]: Start difference. First operand 11135 states and 37250 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) [2021-06-05 06:03:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:35,502 INFO L93 Difference]: Finished difference Result 12630 states and 41581 transitions. [2021-06-05 06:03:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:03:35,502 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 [2021-06-05 06:03:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:35,523 INFO L225 Difference]: With dead ends: 12630 [2021-06-05 06:03:35,523 INFO L226 Difference]: Without dead ends: 12437 [2021-06-05 06:03:35,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1466.9ms TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:03:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2021-06-05 06:03:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 11095. [2021-06-05 06:03:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11095 states, 11094 states have (on average 3.3466738777717686) internal successors, (37128), 11094 states have internal predecessors, (37128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 37128 transitions. [2021-06-05 06:03:35,736 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 37128 transitions. Word has length 36 [2021-06-05 06:03:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:35,737 INFO L482 AbstractCegarLoop]: Abstraction has 11095 states and 37128 transitions. [2021-06-05 06:03:35,737 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) [2021-06-05 06:03:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 37128 transitions. [2021-06-05 06:03:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:35,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:35,751 INFO L521 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] [2021-06-05 06:03:35,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 06:03:35,951 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1758168477, now seen corresponding path program 148 times [2021-06-05 06:03:35,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:35,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285130157] [2021-06-05 06:03:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:36,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:36,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285130157] [2021-06-05 06:03:36,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285130157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:36,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662580310] [2021-06-05 06:03:36,187 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 [2021-06-05 06:03:36,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:03:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:03:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:36,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662580310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:36,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:36,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:03:36,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584171251] [2021-06-05 06:03:36,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:03:36,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:03:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:03:36,864 INFO L87 Difference]: Start difference. First operand 11095 states and 37128 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) [2021-06-05 06:03:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:38,673 INFO L93 Difference]: Finished difference Result 18660 states and 61077 transitions. [2021-06-05 06:03:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:03:38,673 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 [2021-06-05 06:03:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:38,704 INFO L225 Difference]: With dead ends: 18660 [2021-06-05 06:03:38,704 INFO L226 Difference]: Without dead ends: 18580 [2021-06-05 06:03:38,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1459.5ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:03:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18580 states. [2021-06-05 06:03:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18580 to 11219. [2021-06-05 06:03:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 3.345872704581922) internal successors, (37534), 11218 states have internal predecessors, (37534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 37534 transitions. [2021-06-05 06:03:38,956 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 37534 transitions. Word has length 36 [2021-06-05 06:03:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:38,956 INFO L482 AbstractCegarLoop]: Abstraction has 11219 states and 37534 transitions. [2021-06-05 06:03:38,956 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) [2021-06-05 06:03:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 37534 transitions. [2021-06-05 06:03:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:38,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:38,970 INFO L521 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] [2021-06-05 06:03:39,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:39,171 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1371012593, now seen corresponding path program 149 times [2021-06-05 06:03:39,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:39,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893727884] [2021-06-05 06:03:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:39,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893727884] [2021-06-05 06:03:39,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893727884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:39,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296298474] [2021-06-05 06:03:39,414 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 [2021-06-05 06:03:39,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:03:39,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:03:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:40,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296298474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:40,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:40,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:03:40,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596887400] [2021-06-05 06:03:40,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:03:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:03:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:03:40,046 INFO L87 Difference]: Start difference. First operand 11219 states and 37534 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) [2021-06-05 06:03:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:42,348 INFO L93 Difference]: Finished difference Result 19190 states and 62860 transitions. [2021-06-05 06:03:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:03:42,348 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 [2021-06-05 06:03:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:42,378 INFO L225 Difference]: With dead ends: 19190 [2021-06-05 06:03:42,379 INFO L226 Difference]: Without dead ends: 19110 [2021-06-05 06:03:42,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1853.4ms TimeCoverageRelationStatistics Valid=707, Invalid=3715, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:03:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19110 states. [2021-06-05 06:03:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19110 to 11293. [2021-06-05 06:03:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11293 states, 11292 states have (on average 3.34643995749203) internal successors, (37788), 11292 states have internal predecessors, (37788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11293 states to 11293 states and 37788 transitions. [2021-06-05 06:03:42,641 INFO L78 Accepts]: Start accepts. Automaton has 11293 states and 37788 transitions. Word has length 36 [2021-06-05 06:03:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:42,642 INFO L482 AbstractCegarLoop]: Abstraction has 11293 states and 37788 transitions. [2021-06-05 06:03:42,642 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) [2021-06-05 06:03:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 11293 states and 37788 transitions. [2021-06-05 06:03:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:42,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:42,656 INFO L521 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] [2021-06-05 06:03:42,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:42,856 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:42,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1839999759, now seen corresponding path program 150 times [2021-06-05 06:03:42,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:42,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492147595] [2021-06-05 06:03:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:43,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:43,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492147595] [2021-06-05 06:03:43,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492147595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:43,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299759698] [2021-06-05 06:03:43,140 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 [2021-06-05 06:03:43,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:03:43,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:03:43,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:43,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299759698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:43,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:43,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:03:43,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739839760] [2021-06-05 06:03:43,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:03:43,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:43,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:03:43,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:03:43,873 INFO L87 Difference]: Start difference. First operand 11293 states and 37788 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) [2021-06-05 06:03:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:46,641 INFO L93 Difference]: Finished difference Result 21695 states and 69593 transitions. [2021-06-05 06:03:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:03:46,641 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 [2021-06-05 06:03:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:46,675 INFO L225 Difference]: With dead ends: 21695 [2021-06-05 06:03:46,675 INFO L226 Difference]: Without dead ends: 21551 [2021-06-05 06:03:46,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 2492.1ms TimeCoverageRelationStatistics Valid=1057, Invalid=4493, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:03:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21551 states. [2021-06-05 06:03:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21551 to 11339. [2021-06-05 06:03:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11339 states, 11338 states have (on average 3.347062974069501) internal successors, (37949), 11338 states have internal predecessors, (37949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11339 states to 11339 states and 37949 transitions. [2021-06-05 06:03:46,940 INFO L78 Accepts]: Start accepts. Automaton has 11339 states and 37949 transitions. Word has length 36 [2021-06-05 06:03:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:46,940 INFO L482 AbstractCegarLoop]: Abstraction has 11339 states and 37949 transitions. [2021-06-05 06:03:46,940 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) [2021-06-05 06:03:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11339 states and 37949 transitions. [2021-06-05 06:03:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:46,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:46,954 INFO L521 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] [2021-06-05 06:03:47,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 06:03:47,155 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash -555858699, now seen corresponding path program 151 times [2021-06-05 06:03:47,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:47,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175100010] [2021-06-05 06:03:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:47,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175100010] [2021-06-05 06:03:47,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175100010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207007666] [2021-06-05 06:03:47,486 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 [2021-06-05 06:03:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:03:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:48,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207007666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:48,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:48,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:03:48,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588820522] [2021-06-05 06:03:48,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:03:48,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:03:48,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:03:48,382 INFO L87 Difference]: Start difference. First operand 11339 states and 37949 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) [2021-06-05 06:03:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:53,059 INFO L93 Difference]: Finished difference Result 21691 states and 69332 transitions. [2021-06-05 06:03:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 06:03:53,060 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 [2021-06-05 06:03:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:53,097 INFO L225 Difference]: With dead ends: 21691 [2021-06-05 06:03:53,097 INFO L226 Difference]: Without dead ends: 21551 [2021-06-05 06:03:53,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4122.8ms TimeCoverageRelationStatistics Valid=1867, Invalid=9475, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 06:03:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21551 states. [2021-06-05 06:03:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21551 to 11261. [2021-06-05 06:03:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11261 states, 11260 states have (on average 3.3429840142095917) internal successors, (37642), 11260 states have internal predecessors, (37642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11261 states to 11261 states and 37642 transitions. [2021-06-05 06:03:53,386 INFO L78 Accepts]: Start accepts. Automaton has 11261 states and 37642 transitions. Word has length 36 [2021-06-05 06:03:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:53,386 INFO L482 AbstractCegarLoop]: Abstraction has 11261 states and 37642 transitions. [2021-06-05 06:03:53,386 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) [2021-06-05 06:03:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 11261 states and 37642 transitions. [2021-06-05 06:03:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:03:53,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:53,400 INFO L521 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] [2021-06-05 06:03:53,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-06-05 06:03:53,601 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 365843441, now seen corresponding path program 152 times [2021-06-05 06:03:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:53,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349324575] [2021-06-05 06:03:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:53,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349324575] [2021-06-05 06:03:53,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349324575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:53,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893742707] [2021-06-05 06:03:53,920 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 [2021-06-05 06:03:53,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:03:53,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:53,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:03:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:54,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893742707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:54,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:54,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 06:03:54,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962505420] [2021-06-05 06:03:54,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:03:54,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:03:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:03:54,782 INFO L87 Difference]: Start difference. First operand 11261 states and 37642 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) [2021-06-05 06:03:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:59,739 INFO L93 Difference]: Finished difference Result 22170 states and 70997 transitions. [2021-06-05 06:03:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 06:03:59,740 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 [2021-06-05 06:03:59,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:59,772 INFO L225 Difference]: With dead ends: 22170 [2021-06-05 06:03:59,772 INFO L226 Difference]: Without dead ends: 22023 [2021-06-05 06:03:59,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 4326.1ms TimeCoverageRelationStatistics Valid=1849, Invalid=9707, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 06:03:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-06-05 06:03:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 11059. [2021-06-05 06:04:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11059 states, 11058 states have (on average 3.3411105082293364) internal successors, (36946), 11058 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11059 states to 11059 states and 36946 transitions. [2021-06-05 06:04:00,032 INFO L78 Accepts]: Start accepts. Automaton has 11059 states and 36946 transitions. Word has length 36 [2021-06-05 06:04:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:00,032 INFO L482 AbstractCegarLoop]: Abstraction has 11059 states and 36946 transitions. [2021-06-05 06:04:00,032 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) [2021-06-05 06:04:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11059 states and 36946 transitions. [2021-06-05 06:04:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:00,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:00,045 INFO L521 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] [2021-06-05 06:04:00,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1201 [2021-06-05 06:04:00,246 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash 160293389, now seen corresponding path program 153 times [2021-06-05 06:04:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:00,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457532346] [2021-06-05 06:04:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:00,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:00,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457532346] [2021-06-05 06:04:00,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457532346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:00,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213794493] [2021-06-05 06:04:00,536 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 [2021-06-05 06:04:00,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:04:00,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:00,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:04:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:01,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213794493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:01,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:01,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:04:01,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289386440] [2021-06-05 06:04:01,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:01,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:01,258 INFO L87 Difference]: Start difference. First operand 11059 states and 36946 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) [2021-06-05 06:04:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:03,947 INFO L93 Difference]: Finished difference Result 21001 states and 67476 transitions. [2021-06-05 06:04:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:04:03,947 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 [2021-06-05 06:04:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:03,981 INFO L225 Difference]: With dead ends: 21001 [2021-06-05 06:04:03,981 INFO L226 Difference]: Without dead ends: 20857 [2021-06-05 06:04:03,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2459.4ms TimeCoverageRelationStatistics Valid=1042, Invalid=4360, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:04:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-06-05 06:04:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 11071. [2021-06-05 06:04:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 11070 states have (on average 3.3383920505871725) internal successors, (36956), 11070 states have internal predecessors, (36956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 36956 transitions. [2021-06-05 06:04:04,235 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 36956 transitions. Word has length 36 [2021-06-05 06:04:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:04,235 INFO L482 AbstractCegarLoop]: Abstraction has 11071 states and 36956 transitions. [2021-06-05 06:04:04,235 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) [2021-06-05 06:04:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 36956 transitions. [2021-06-05 06:04:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:04,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:04,249 INFO L521 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] [2021-06-05 06:04:04,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-06-05 06:04:04,450 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash 33738725, now seen corresponding path program 154 times [2021-06-05 06:04:04,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:04,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661041932] [2021-06-05 06:04:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:04,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:04,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661041932] [2021-06-05 06:04:04,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661041932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:04,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931027144] [2021-06-05 06:04:04,708 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 [2021-06-05 06:04:04,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:04:04,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:04:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931027144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:05,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:04:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991989534] [2021-06-05 06:04:05,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:05,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:05,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:05,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:05,468 INFO L87 Difference]: Start difference. First operand 11071 states and 36956 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) [2021-06-05 06:04:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:08,216 INFO L93 Difference]: Finished difference Result 16954 states and 55580 transitions. [2021-06-05 06:04:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:04:08,216 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 [2021-06-05 06:04:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:08,244 INFO L225 Difference]: With dead ends: 16954 [2021-06-05 06:04:08,244 INFO L226 Difference]: Without dead ends: 16859 [2021-06-05 06:04:08,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2224.6ms TimeCoverageRelationStatistics Valid=677, Invalid=3879, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:04:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2021-06-05 06:04:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 11161. [2021-06-05 06:04:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11161 states, 11160 states have (on average 3.338172043010753) internal successors, (37254), 11160 states have internal predecessors, (37254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37254 transitions. [2021-06-05 06:04:08,460 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37254 transitions. Word has length 36 [2021-06-05 06:04:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:08,460 INFO L482 AbstractCegarLoop]: Abstraction has 11161 states and 37254 transitions. [2021-06-05 06:04:08,460 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) [2021-06-05 06:04:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37254 transitions. [2021-06-05 06:04:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:08,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:08,474 INFO L521 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] [2021-06-05 06:04:08,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1225,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:08,674 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash 955440865, now seen corresponding path program 155 times [2021-06-05 06:04:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:08,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309502241] [2021-06-05 06:04:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:08,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309502241] [2021-06-05 06:04:08,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309502241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382605578] [2021-06-05 06:04:08,946 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 [2021-06-05 06:04:08,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:04:08,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:04:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:09,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382605578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:09,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:09,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:04:09,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595112628] [2021-06-05 06:04:09,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:09,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:09,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:09,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:09,667 INFO L87 Difference]: Start difference. First operand 11161 states and 37254 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) [2021-06-05 06:04:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:11,495 INFO L93 Difference]: Finished difference Result 18115 states and 58822 transitions. [2021-06-05 06:04:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:04:11,495 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 [2021-06-05 06:04:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:11,523 INFO L225 Difference]: With dead ends: 18115 [2021-06-05 06:04:11,523 INFO L226 Difference]: Without dead ends: 17995 [2021-06-05 06:04:11,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1530.4ms TimeCoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:04:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17995 states. [2021-06-05 06:04:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17995 to 11155. [2021-06-05 06:04:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 3.3381746458669537) internal successors, (37234), 11154 states have internal predecessors, (37234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 37234 transitions. [2021-06-05 06:04:11,744 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 37234 transitions. Word has length 36 [2021-06-05 06:04:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:11,744 INFO L482 AbstractCegarLoop]: Abstraction has 11155 states and 37234 transitions. [2021-06-05 06:04:11,744 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) [2021-06-05 06:04:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 37234 transitions. [2021-06-05 06:04:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:11,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:11,757 INFO L521 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] [2021-06-05 06:04:11,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 06:04:11,958 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:11,958 INFO L82 PathProgramCache]: Analyzing trace with hash 885330829, now seen corresponding path program 156 times [2021-06-05 06:04:11,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:11,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034756861] [2021-06-05 06:04:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:12,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:12,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034756861] [2021-06-05 06:04:12,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034756861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:12,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52353425] [2021-06-05 06:04:12,213 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:12,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:04:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:04:12,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:12,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52353425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:12,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:12,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:04:12,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451047379] [2021-06-05 06:04:12,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:04:12,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:04:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:04:12,920 INFO L87 Difference]: Start difference. First operand 11155 states and 37234 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) [2021-06-05 06:04:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:14,822 INFO L93 Difference]: Finished difference Result 19686 states and 64539 transitions. [2021-06-05 06:04:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:04:14,823 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 [2021-06-05 06:04:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:14,860 INFO L225 Difference]: With dead ends: 19686 [2021-06-05 06:04:14,860 INFO L226 Difference]: Without dead ends: 19566 [2021-06-05 06:04:14,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1776.8ms TimeCoverageRelationStatistics Valid=562, Invalid=2630, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:04:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19566 states. [2021-06-05 06:04:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19566 to 11147. [2021-06-05 06:04:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11147 states, 11146 states have (on average 3.3384173694598958) internal successors, (37210), 11146 states have internal predecessors, (37210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 37210 transitions. [2021-06-05 06:04:15,094 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 37210 transitions. Word has length 36 [2021-06-05 06:04:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:15,094 INFO L482 AbstractCegarLoop]: Abstraction has 11147 states and 37210 transitions. [2021-06-05 06:04:15,094 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) [2021-06-05 06:04:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 37210 transitions. [2021-06-05 06:04:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:15,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:15,107 INFO L521 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] [2021-06-05 06:04:15,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1244,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:15,308 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:15,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1648635209, now seen corresponding path program 157 times [2021-06-05 06:04:15,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:15,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46562615] [2021-06-05 06:04:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:15,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:15,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46562615] [2021-06-05 06:04:15,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46562615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:15,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134052428] [2021-06-05 06:04:15,585 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:15,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:04:15,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134052428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:16,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:16,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 06:04:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803486520] [2021-06-05 06:04:16,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:04:16,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:16,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:04:16,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:04:16,424 INFO L87 Difference]: Start difference. First operand 11147 states and 37210 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) [2021-06-05 06:04:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:18,349 INFO L93 Difference]: Finished difference Result 18416 states and 60517 transitions. [2021-06-05 06:04:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:04:18,350 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 [2021-06-05 06:04:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:18,385 INFO L225 Difference]: With dead ends: 18416 [2021-06-05 06:04:18,385 INFO L226 Difference]: Without dead ends: 18321 [2021-06-05 06:04:18,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1850.1ms TimeCoverageRelationStatistics Valid=615, Invalid=3417, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:04:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18321 states. [2021-06-05 06:04:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18321 to 11183. [2021-06-05 06:04:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11183 states, 11182 states have (on average 3.338579860490073) internal successors, (37332), 11182 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11183 states to 11183 states and 37332 transitions. [2021-06-05 06:04:18,689 INFO L78 Accepts]: Start accepts. Automaton has 11183 states and 37332 transitions. Word has length 36 [2021-06-05 06:04:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:18,689 INFO L482 AbstractCegarLoop]: Abstraction has 11183 states and 37332 transitions. [2021-06-05 06:04:18,689 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) [2021-06-05 06:04:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 11183 states and 37332 transitions. [2021-06-05 06:04:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:18,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:18,702 INFO L521 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] [2021-06-05 06:04:18,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 06:04:18,902 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764087, now seen corresponding path program 158 times [2021-06-05 06:04:18,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:18,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691360298] [2021-06-05 06:04:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:19,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:19,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691360298] [2021-06-05 06:04:19,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691360298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:19,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624969873] [2021-06-05 06:04:19,193 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 [2021-06-05 06:04:19,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:04:19,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:19,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:04:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624969873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:19,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:19,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:04:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746287361] [2021-06-05 06:04:19,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:19,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:19,935 INFO L87 Difference]: Start difference. First operand 11183 states and 37332 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) [2021-06-05 06:04:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:22,350 INFO L93 Difference]: Finished difference Result 22457 states and 73215 transitions. [2021-06-05 06:04:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:04:22,351 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 [2021-06-05 06:04:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:22,391 INFO L225 Difference]: With dead ends: 22457 [2021-06-05 06:04:22,391 INFO L226 Difference]: Without dead ends: 22313 [2021-06-05 06:04:22,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2146.4ms TimeCoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:04:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22313 states. [2021-06-05 06:04:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22313 to 11051. [2021-06-05 06:04:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11051 states, 11050 states have (on average 3.3337556561085973) internal successors, (36838), 11050 states have internal predecessors, (36838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11051 states to 11051 states and 36838 transitions. [2021-06-05 06:04:22,687 INFO L78 Accepts]: Start accepts. Automaton has 11051 states and 36838 transitions. Word has length 36 [2021-06-05 06:04:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:22,687 INFO L482 AbstractCegarLoop]: Abstraction has 11051 states and 36838 transitions. [2021-06-05 06:04:22,687 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) [2021-06-05 06:04:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11051 states and 36838 transitions. [2021-06-05 06:04:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:22,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:22,700 INFO L521 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] [2021-06-05 06:04:22,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1268 [2021-06-05 06:04:22,900 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash 546993293, now seen corresponding path program 159 times [2021-06-05 06:04:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:22,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197898589] [2021-06-05 06:04:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:23,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:23,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197898589] [2021-06-05 06:04:23,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197898589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:23,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459828051] [2021-06-05 06:04:23,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:23,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:04:23,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:04:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:23,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459828051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:23,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:23,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:04:23,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335357652] [2021-06-05 06:04:23,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:04:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:04:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:04:23,904 INFO L87 Difference]: Start difference. First operand 11051 states and 36838 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) [2021-06-05 06:04:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:25,909 INFO L93 Difference]: Finished difference Result 17392 states and 57477 transitions. [2021-06-05 06:04:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:04:25,909 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 [2021-06-05 06:04:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:25,937 INFO L225 Difference]: With dead ends: 17392 [2021-06-05 06:04:25,937 INFO L226 Difference]: Without dead ends: 17272 [2021-06-05 06:04:25,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1759.0ms TimeCoverageRelationStatistics Valid=529, Invalid=3131, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:04:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2021-06-05 06:04:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 11043. [2021-06-05 06:04:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 3.333997464227495) internal successors, (36814), 11042 states have internal predecessors, (36814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 36814 transitions. [2021-06-05 06:04:26,218 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 36814 transitions. Word has length 36 [2021-06-05 06:04:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:26,218 INFO L482 AbstractCegarLoop]: Abstraction has 11043 states and 36814 transitions. [2021-06-05 06:04:26,219 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) [2021-06-05 06:04:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 36814 transitions. [2021-06-05 06:04:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:26,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:26,231 INFO L521 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] [2021-06-05 06:04:26,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-06-05 06:04:26,432 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1786449251, now seen corresponding path program 160 times [2021-06-05 06:04:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:26,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289294347] [2021-06-05 06:04:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:26,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289294347] [2021-06-05 06:04:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289294347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568468919] [2021-06-05 06:04:26,708 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 [2021-06-05 06:04:26,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:04:26,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:04:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:27,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568468919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:27,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:27,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:04:27,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165583300] [2021-06-05 06:04:27,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:27,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:27,482 INFO L87 Difference]: Start difference. First operand 11043 states and 36814 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) [2021-06-05 06:04:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:30,229 INFO L93 Difference]: Finished difference Result 18424 states and 60727 transitions. [2021-06-05 06:04:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:04:30,229 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 [2021-06-05 06:04:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:30,259 INFO L225 Difference]: With dead ends: 18424 [2021-06-05 06:04:30,259 INFO L226 Difference]: Without dead ends: 18304 [2021-06-05 06:04:30,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 2322.4ms TimeCoverageRelationStatistics Valid=695, Invalid=3465, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:04:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-06-05 06:04:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 11191. [2021-06-05 06:04:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11191 states, 11190 states have (on average 3.3335120643431635) internal successors, (37302), 11190 states have internal predecessors, (37302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11191 states to 11191 states and 37302 transitions. [2021-06-05 06:04:30,547 INFO L78 Accepts]: Start accepts. Automaton has 11191 states and 37302 transitions. Word has length 36 [2021-06-05 06:04:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:30,547 INFO L482 AbstractCegarLoop]: Abstraction has 11191 states and 37302 transitions. [2021-06-05 06:04:30,547 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) [2021-06-05 06:04:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 11191 states and 37302 transitions. [2021-06-05 06:04:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:30,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:30,560 INFO L521 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] [2021-06-05 06:04:30,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1292,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:30,760 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash 207810913, now seen corresponding path program 161 times [2021-06-05 06:04:30,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:30,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762323462] [2021-06-05 06:04:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:31,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:31,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762323462] [2021-06-05 06:04:31,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762323462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:31,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378941349] [2021-06-05 06:04:31,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:31,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:04:31,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:04:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:31,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378941349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:31,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:31,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:04:31,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125960782] [2021-06-05 06:04:31,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:31,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:31,752 INFO L87 Difference]: Start difference. First operand 11191 states and 37302 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) [2021-06-05 06:04:34,781 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 06:04:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:34,996 INFO L93 Difference]: Finished difference Result 20352 states and 64972 transitions. [2021-06-05 06:04:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:04:34,997 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 [2021-06-05 06:04:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:35,027 INFO L225 Difference]: With dead ends: 20352 [2021-06-05 06:04:35,027 INFO L226 Difference]: Without dead ends: 20245 [2021-06-05 06:04:35,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 2895.1ms TimeCoverageRelationStatistics Valid=1011, Invalid=4841, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:04:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20245 states. [2021-06-05 06:04:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20245 to 11371. [2021-06-05 06:04:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11371 states, 11370 states have (on average 3.3333333333333335) internal successors, (37900), 11370 states have internal predecessors, (37900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11371 states to 11371 states and 37900 transitions. [2021-06-05 06:04:35,263 INFO L78 Accepts]: Start accepts. Automaton has 11371 states and 37900 transitions. Word has length 36 [2021-06-05 06:04:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:35,263 INFO L482 AbstractCegarLoop]: Abstraction has 11371 states and 37900 transitions. [2021-06-05 06:04:35,263 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) [2021-06-05 06:04:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 11371 states and 37900 transitions. [2021-06-05 06:04:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:35,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:35,276 INFO L521 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] [2021-06-05 06:04:35,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1304 [2021-06-05 06:04:35,477 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1491951973, now seen corresponding path program 162 times [2021-06-05 06:04:35,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:35,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748017936] [2021-06-05 06:04:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:35,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:35,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748017936] [2021-06-05 06:04:35,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748017936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:35,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603071980] [2021-06-05 06:04:35,780 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 [2021-06-05 06:04:35,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:04:35,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:35,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:04:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603071980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:36,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:36,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:04:36,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009482398] [2021-06-05 06:04:36,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:04:36,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:36,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:04:36,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:04:36,358 INFO L87 Difference]: Start difference. First operand 11371 states and 37900 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) [2021-06-05 06:04:41,480 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 06:04:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:42,481 INFO L93 Difference]: Finished difference Result 21226 states and 67124 transitions. [2021-06-05 06:04:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 06:04:42,482 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 [2021-06-05 06:04:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:42,514 INFO L225 Difference]: With dead ends: 21226 [2021-06-05 06:04:42,514 INFO L226 Difference]: Without dead ends: 20979 [2021-06-05 06:04:42,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 4998.0ms TimeCoverageRelationStatistics Valid=1866, Invalid=11706, Unknown=0, NotChecked=0, Total=13572 [2021-06-05 06:04:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2021-06-05 06:04:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 11396. [2021-06-05 06:04:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11396 states, 11395 states have (on average 3.334971478718736) internal successors, (38002), 11395 states have internal predecessors, (38002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11396 states to 11396 states and 38002 transitions. [2021-06-05 06:04:42,776 INFO L78 Accepts]: Start accepts. Automaton has 11396 states and 38002 transitions. Word has length 36 [2021-06-05 06:04:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:42,776 INFO L482 AbstractCegarLoop]: Abstraction has 11396 states and 38002 transitions. [2021-06-05 06:04:42,776 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) [2021-06-05 06:04:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 11396 states and 38002 transitions. [2021-06-05 06:04:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:42,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:42,789 INFO L521 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] [2021-06-05 06:04:42,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1308,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:42,990 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -406577051, now seen corresponding path program 163 times [2021-06-05 06:04:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:42,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785882235] [2021-06-05 06:04:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:43,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:43,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785882235] [2021-06-05 06:04:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785882235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:43,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568274568] [2021-06-05 06:04:43,363 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 [2021-06-05 06:04:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:04:43,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:44,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568274568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:44,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:44,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:04:44,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901617263] [2021-06-05 06:04:44,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:04:44,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:04:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:04:44,003 INFO L87 Difference]: Start difference. First operand 11396 states and 38002 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) [2021-06-05 06:04:48,612 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 06:04:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:49,229 INFO L93 Difference]: Finished difference Result 21113 states and 66892 transitions. [2021-06-05 06:04:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 06:04:49,229 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 [2021-06-05 06:04:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:49,260 INFO L225 Difference]: With dead ends: 21113 [2021-06-05 06:04:49,260 INFO L226 Difference]: Without dead ends: 20928 [2021-06-05 06:04:49,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3909 ImplicationChecksByTransitivity, 4498.5ms TimeCoverageRelationStatistics Valid=1899, Invalid=9657, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 06:04:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20928 states. [2021-06-05 06:04:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20928 to 11436. [2021-06-05 06:04:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11436 states, 11435 states have (on average 3.336073458679493) internal successors, (38148), 11435 states have internal predecessors, (38148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11436 states to 11436 states and 38148 transitions. [2021-06-05 06:04:49,532 INFO L78 Accepts]: Start accepts. Automaton has 11436 states and 38148 transitions. Word has length 36 [2021-06-05 06:04:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:49,532 INFO L482 AbstractCegarLoop]: Abstraction has 11436 states and 38148 transitions. [2021-06-05 06:04:49,533 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) [2021-06-05 06:04:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 11436 states and 38148 transitions. [2021-06-05 06:04:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:49,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:49,547 INFO L521 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] [2021-06-05 06:04:49,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-06-05 06:04:49,748 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash 515125089, now seen corresponding path program 164 times [2021-06-05 06:04:49,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:49,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110827168] [2021-06-05 06:04:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:50,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:50,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110827168] [2021-06-05 06:04:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110827168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:50,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318732822] [2021-06-05 06:04:50,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:04:50,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:04:50,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:04:50,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:50,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318732822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:50,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:50,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:04:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302544664] [2021-06-05 06:04:50,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:04:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:04:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:04:50,669 INFO L87 Difference]: Start difference. First operand 11436 states and 38148 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) [2021-06-05 06:04:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:04:56,288 INFO L93 Difference]: Finished difference Result 21255 states and 67401 transitions. [2021-06-05 06:04:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 06:04:56,289 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 [2021-06-05 06:04:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:04:56,322 INFO L225 Difference]: With dead ends: 21255 [2021-06-05 06:04:56,322 INFO L226 Difference]: Without dead ends: 20974 [2021-06-05 06:04:56,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 4729.7ms TimeCoverageRelationStatistics Valid=2087, Invalid=10123, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 06:04:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20974 states. [2021-06-05 06:04:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20974 to 11438. [2021-06-05 06:04:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11438 states, 11437 states have (on average 3.3360146891667397) internal successors, (38154), 11437 states have internal predecessors, (38154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:04:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11438 states to 11438 states and 38154 transitions. [2021-06-05 06:04:56,604 INFO L78 Accepts]: Start accepts. Automaton has 11438 states and 38154 transitions. Word has length 36 [2021-06-05 06:04:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:04:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 11438 states and 38154 transitions. [2021-06-05 06:04:56,604 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) [2021-06-05 06:04:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11438 states and 38154 transitions. [2021-06-05 06:04:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:04:56,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:04:56,618 INFO L521 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] [2021-06-05 06:04:56,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-06-05 06:04:56,818 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:04:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:04:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1318193907, now seen corresponding path program 165 times [2021-06-05 06:04:56,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:04:56,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537376998] [2021-06-05 06:04:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:04:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:04:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:57,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:04:57,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537376998] [2021-06-05 06:04:57,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537376998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:57,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093113739] [2021-06-05 06:04:57,191 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 [2021-06-05 06:04:57,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:04:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:04:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:04:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:04:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:04:57,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093113739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:04:57,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:04:57,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:04:57,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811644651] [2021-06-05 06:04:57,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:04:57,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:04:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:04:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:04:57,823 INFO L87 Difference]: Start difference. First operand 11438 states and 38154 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) [2021-06-05 06:05:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:01,254 INFO L93 Difference]: Finished difference Result 21744 states and 69783 transitions. [2021-06-05 06:05:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:05:01,255 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 [2021-06-05 06:05:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:01,292 INFO L225 Difference]: With dead ends: 21744 [2021-06-05 06:05:01,292 INFO L226 Difference]: Without dead ends: 21600 [2021-06-05 06:05:01,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 3105.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=5341, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 06:05:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21600 states. [2021-06-05 06:05:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21600 to 11488. [2021-06-05 06:05:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11488 states, 11487 states have (on average 3.3368155305998086) internal successors, (38330), 11487 states have internal predecessors, (38330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11488 states to 11488 states and 38330 transitions. [2021-06-05 06:05:01,549 INFO L78 Accepts]: Start accepts. Automaton has 11488 states and 38330 transitions. Word has length 36 [2021-06-05 06:05:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:01,549 INFO L482 AbstractCegarLoop]: Abstraction has 11488 states and 38330 transitions. [2021-06-05 06:05:01,549 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) [2021-06-05 06:05:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11488 states and 38330 transitions. [2021-06-05 06:05:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:01,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:01,562 INFO L521 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] [2021-06-05 06:05:01,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-06-05 06:05:01,764 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -34052847, now seen corresponding path program 166 times [2021-06-05 06:05:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:01,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515174654] [2021-06-05 06:05:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:02,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:02,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515174654] [2021-06-05 06:05:02,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515174654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:02,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401328452] [2021-06-05 06:05:02,089 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 [2021-06-05 06:05:02,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:05:02,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:05:02,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401328452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:05:02,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834768469] [2021-06-05 06:05:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:05:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:05:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:05:02,754 INFO L87 Difference]: Start difference. First operand 11488 states and 38330 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) [2021-06-05 06:05:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:08,240 INFO L93 Difference]: Finished difference Result 22452 states and 70987 transitions. [2021-06-05 06:05:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 06:05:08,240 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 [2021-06-05 06:05:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:08,275 INFO L225 Difference]: With dead ends: 22452 [2021-06-05 06:05:08,275 INFO L226 Difference]: Without dead ends: 22279 [2021-06-05 06:05:08,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 4686.5ms TimeCoverageRelationStatistics Valid=1874, Invalid=10558, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 06:05:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22279 states. [2021-06-05 06:05:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22279 to 11506. [2021-06-05 06:05:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.3364624076488485) internal successors, (38386), 11505 states have internal predecessors, (38386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 38386 transitions. [2021-06-05 06:05:08,557 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 38386 transitions. Word has length 36 [2021-06-05 06:05:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:08,557 INFO L482 AbstractCegarLoop]: Abstraction has 11506 states and 38386 transitions. [2021-06-05 06:05:08,558 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) [2021-06-05 06:05:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 38386 transitions. [2021-06-05 06:05:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:08,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:08,572 INFO L521 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] [2021-06-05 06:05:08,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:05:08,772 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:08,772 INFO L82 PathProgramCache]: Analyzing trace with hash 887649293, now seen corresponding path program 167 times [2021-06-05 06:05:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:08,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725433894] [2021-06-05 06:05:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:09,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725433894] [2021-06-05 06:05:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725433894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214187312] [2021-06-05 06:05:09,158 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 [2021-06-05 06:05:09,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:05:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:05:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:09,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214187312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:09,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:09,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:05:09,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818298789] [2021-06-05 06:05:09,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:05:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:05:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:05:09,798 INFO L87 Difference]: Start difference. First operand 11506 states and 38386 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) [2021-06-05 06:05:15,018 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 06:05:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:15,896 INFO L93 Difference]: Finished difference Result 23227 states and 73376 transitions. [2021-06-05 06:05:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 06:05:15,897 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 [2021-06-05 06:05:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:15,931 INFO L225 Difference]: With dead ends: 23227 [2021-06-05 06:05:15,931 INFO L226 Difference]: Without dead ends: 22979 [2021-06-05 06:05:15,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4641 ImplicationChecksByTransitivity, 5138.6ms TimeCoverageRelationStatistics Valid=2062, Invalid=11278, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 06:05:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22979 states. [2021-06-05 06:05:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22979 to 11503. [2021-06-05 06:05:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.3362893409841767) internal successors, (38374), 11502 states have internal predecessors, (38374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 38374 transitions. [2021-06-05 06:05:16,221 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 38374 transitions. Word has length 36 [2021-06-05 06:05:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:16,221 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 38374 transitions. [2021-06-05 06:05:16,221 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) [2021-06-05 06:05:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 38374 transitions. [2021-06-05 06:05:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:16,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:16,234 INFO L521 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] [2021-06-05 06:05:16,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 06:05:16,435 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash -468537303, now seen corresponding path program 168 times [2021-06-05 06:05:16,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:16,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981320369] [2021-06-05 06:05:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:16,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:16,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981320369] [2021-06-05 06:05:16,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981320369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:16,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188407571] [2021-06-05 06:05:16,781 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 [2021-06-05 06:05:16,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:05:16,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:05:16,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:17,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188407571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:17,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:17,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:05:17,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65317792] [2021-06-05 06:05:17,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:05:17,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:17,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:05:17,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:05:17,421 INFO L87 Difference]: Start difference. First operand 11503 states and 38374 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) [2021-06-05 06:05:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:19,446 INFO L93 Difference]: Finished difference Result 13637 states and 44686 transitions. [2021-06-05 06:05:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:05:19,447 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 [2021-06-05 06:05:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:19,469 INFO L225 Difference]: With dead ends: 13637 [2021-06-05 06:05:19,470 INFO L226 Difference]: Without dead ends: 13523 [2021-06-05 06:05:19,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1700.9ms TimeCoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:05:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13523 states. [2021-06-05 06:05:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13523 to 11535. [2021-06-05 06:05:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11534 states have (on average 3.336916941217271) internal successors, (38488), 11534 states have internal predecessors, (38488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 38488 transitions. [2021-06-05 06:05:19,673 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 38488 transitions. Word has length 36 [2021-06-05 06:05:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:19,673 INFO L482 AbstractCegarLoop]: Abstraction has 11535 states and 38488 transitions. [2021-06-05 06:05:19,673 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) [2021-06-05 06:05:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 38488 transitions. [2021-06-05 06:05:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:19,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:19,687 INFO L521 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] [2021-06-05 06:05:19,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:05:19,888 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash 383054801, now seen corresponding path program 169 times [2021-06-05 06:05:19,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:19,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96114326] [2021-06-05 06:05:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:20,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96114326] [2021-06-05 06:05:20,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96114326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:20,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28078668] [2021-06-05 06:05:20,248 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 [2021-06-05 06:05:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:05:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:20,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28078668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:20,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:20,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:05:20,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510682803] [2021-06-05 06:05:20,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:05:20,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:05:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:05:20,933 INFO L87 Difference]: Start difference. First operand 11535 states and 38488 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) [2021-06-05 06:05:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:22,555 INFO L93 Difference]: Finished difference Result 16714 states and 54896 transitions. [2021-06-05 06:05:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:05:22,555 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 [2021-06-05 06:05:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:22,587 INFO L225 Difference]: With dead ends: 16714 [2021-06-05 06:05:22,587 INFO L226 Difference]: Without dead ends: 16594 [2021-06-05 06:05:22,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1639.6ms TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:05:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16594 states. [2021-06-05 06:05:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16594 to 11539. [2021-06-05 06:05:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11539 states, 11538 states have (on average 3.3368001386722135) internal successors, (38500), 11538 states have internal predecessors, (38500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11539 states to 11539 states and 38500 transitions. [2021-06-05 06:05:22,808 INFO L78 Accepts]: Start accepts. Automaton has 11539 states and 38500 transitions. Word has length 36 [2021-06-05 06:05:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:22,808 INFO L482 AbstractCegarLoop]: Abstraction has 11539 states and 38500 transitions. [2021-06-05 06:05:22,808 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) [2021-06-05 06:05:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11539 states and 38500 transitions. [2021-06-05 06:05:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:22,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:22,821 INFO L521 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] [2021-06-05 06:05:23,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-06-05 06:05:23,022 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1189866523, now seen corresponding path program 170 times [2021-06-05 06:05:23,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:23,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208228778] [2021-06-05 06:05:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:23,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208228778] [2021-06-05 06:05:23,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208228778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287557141] [2021-06-05 06:05:23,319 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 [2021-06-05 06:05:23,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:05:23,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:05:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:23,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287557141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:23,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:23,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:05:23,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099125992] [2021-06-05 06:05:23,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:05:23,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:05:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:05:23,901 INFO L87 Difference]: Start difference. First operand 11539 states and 38500 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) [2021-06-05 06:05:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:27,552 INFO L93 Difference]: Finished difference Result 13195 states and 43100 transitions. [2021-06-05 06:05:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 06:05:27,553 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 [2021-06-05 06:05:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:27,573 INFO L225 Difference]: With dead ends: 13195 [2021-06-05 06:05:27,574 INFO L226 Difference]: Without dead ends: 12999 [2021-06-05 06:05:27,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 2825.9ms TimeCoverageRelationStatistics Valid=746, Invalid=5574, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:05:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12999 states. [2021-06-05 06:05:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12999 to 11593. [2021-06-05 06:05:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11593 states, 11592 states have (on average 3.3358350586611456) internal successors, (38669), 11592 states have internal predecessors, (38669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11593 states to 11593 states and 38669 transitions. [2021-06-05 06:05:27,767 INFO L78 Accepts]: Start accepts. Automaton has 11593 states and 38669 transitions. Word has length 36 [2021-06-05 06:05:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:27,767 INFO L482 AbstractCegarLoop]: Abstraction has 11593 states and 38669 transitions. [2021-06-05 06:05:27,767 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) [2021-06-05 06:05:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 11593 states and 38669 transitions. [2021-06-05 06:05:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:27,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:27,780 INFO L521 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] [2021-06-05 06:05:27,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-06-05 06:05:27,981 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1146359181, now seen corresponding path program 171 times [2021-06-05 06:05:27,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:27,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301609865] [2021-06-05 06:05:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:28,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:28,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301609865] [2021-06-05 06:05:28,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301609865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:28,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382281686] [2021-06-05 06:05:28,280 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 [2021-06-05 06:05:28,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:05:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:05:28,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382281686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:28,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:28,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:05:28,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715928096] [2021-06-05 06:05:28,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:05:28,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:05:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:05:28,857 INFO L87 Difference]: Start difference. First operand 11593 states and 38669 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) [2021-06-05 06:05:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:31,879 INFO L93 Difference]: Finished difference Result 14199 states and 46179 transitions. [2021-06-05 06:05:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:05:31,879 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 [2021-06-05 06:05:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:31,906 INFO L225 Difference]: With dead ends: 14199 [2021-06-05 06:05:31,907 INFO L226 Difference]: Without dead ends: 14003 [2021-06-05 06:05:31,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 2447.7ms TimeCoverageRelationStatistics Valid=792, Invalid=5060, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:05:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14003 states. [2021-06-05 06:05:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14003 to 11627. [2021-06-05 06:05:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11627 states, 11626 states have (on average 3.33700326853604) internal successors, (38796), 11626 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11627 states to 11627 states and 38796 transitions. [2021-06-05 06:05:32,128 INFO L78 Accepts]: Start accepts. Automaton has 11627 states and 38796 transitions. Word has length 36 [2021-06-05 06:05:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:32,129 INFO L482 AbstractCegarLoop]: Abstraction has 11627 states and 38796 transitions. [2021-06-05 06:05:32,129 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) [2021-06-05 06:05:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11627 states and 38796 transitions. [2021-06-05 06:05:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:32,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:32,143 INFO L521 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] [2021-06-05 06:05:32,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1359 [2021-06-05 06:05:32,343 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:32,344 INFO L82 PathProgramCache]: Analyzing trace with hash 114827301, now seen corresponding path program 172 times [2021-06-05 06:05:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:32,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487376000] [2021-06-05 06:05:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:32,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:32,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487376000] [2021-06-05 06:05:32,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487376000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:32,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514310896] [2021-06-05 06:05:32,725 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 [2021-06-05 06:05:32,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:05:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:05:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:33,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514310896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:33,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:33,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:05:33,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511177837] [2021-06-05 06:05:33,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:05:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:05:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:05:33,305 INFO L87 Difference]: Start difference. First operand 11627 states and 38796 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) [2021-06-05 06:05:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:35,408 INFO L93 Difference]: Finished difference Result 15890 states and 51993 transitions. [2021-06-05 06:05:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:05:35,409 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 [2021-06-05 06:05:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:35,435 INFO L225 Difference]: With dead ends: 15890 [2021-06-05 06:05:35,435 INFO L226 Difference]: Without dead ends: 15721 [2021-06-05 06:05:35,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2023.2ms TimeCoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:05:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15721 states. [2021-06-05 06:05:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15721 to 11624. [2021-06-05 06:05:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11624 states, 11623 states have (on average 3.3365740342424504) internal successors, (38781), 11623 states have internal predecessors, (38781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11624 states to 11624 states and 38781 transitions. [2021-06-05 06:05:35,651 INFO L78 Accepts]: Start accepts. Automaton has 11624 states and 38781 transitions. Word has length 36 [2021-06-05 06:05:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:35,651 INFO L482 AbstractCegarLoop]: Abstraction has 11624 states and 38781 transitions. [2021-06-05 06:05:35,651 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) [2021-06-05 06:05:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11624 states and 38781 transitions. [2021-06-05 06:05:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:35,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:35,665 INFO L521 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] [2021-06-05 06:05:35,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-05 06:05:35,865 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1397455009, now seen corresponding path program 173 times [2021-06-05 06:05:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044539725] [2021-06-05 06:05:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:36,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:36,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044539725] [2021-06-05 06:05:36,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044539725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:36,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175058741] [2021-06-05 06:05:36,179 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 [2021-06-05 06:05:36,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:05:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:36,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:05:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:36,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175058741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:36,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:36,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:05:36,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379627642] [2021-06-05 06:05:36,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:05:36,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:36,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:05:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:05:36,846 INFO L87 Difference]: Start difference. First operand 11624 states and 38781 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) [2021-06-05 06:05:40,107 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 06:05:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:40,906 INFO L93 Difference]: Finished difference Result 14094 states and 45590 transitions. [2021-06-05 06:05:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:05:40,906 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 [2021-06-05 06:05:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:40,927 INFO L225 Difference]: With dead ends: 14094 [2021-06-05 06:05:40,927 INFO L226 Difference]: Without dead ends: 13879 [2021-06-05 06:05:40,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 3189.8ms TimeCoverageRelationStatistics Valid=878, Invalid=6432, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 06:05:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13879 states. [2021-06-05 06:05:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13879 to 11726. [2021-06-05 06:05:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11726 states, 11725 states have (on average 3.3335607675906185) internal successors, (39086), 11725 states have internal predecessors, (39086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 39086 transitions. [2021-06-05 06:05:41,124 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 39086 transitions. Word has length 36 [2021-06-05 06:05:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:41,124 INFO L482 AbstractCegarLoop]: Abstraction has 11726 states and 39086 transitions. [2021-06-05 06:05:41,124 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) [2021-06-05 06:05:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 39086 transitions. [2021-06-05 06:05:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:41,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:41,138 INFO L521 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] [2021-06-05 06:05:41,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-06-05 06:05:41,339 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1701030301, now seen corresponding path program 174 times [2021-06-05 06:05:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:41,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29985379] [2021-06-05 06:05:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:41,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29985379] [2021-06-05 06:05:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29985379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083236421] [2021-06-05 06:05:41,642 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 [2021-06-05 06:05:41,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:05:41,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:05:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:42,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083236421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:42,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:42,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:05:42,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391209146] [2021-06-05 06:05:42,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:05:42,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:05:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:05:42,268 INFO L87 Difference]: Start difference. First operand 11726 states and 39086 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) [2021-06-05 06:05:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:46,559 INFO L93 Difference]: Finished difference Result 15383 states and 49434 transitions. [2021-06-05 06:05:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:05:46,559 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 [2021-06-05 06:05:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:46,583 INFO L225 Difference]: With dead ends: 15383 [2021-06-05 06:05:46,584 INFO L226 Difference]: Without dead ends: 15107 [2021-06-05 06:05:46,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 3187.9ms TimeCoverageRelationStatistics Valid=963, Invalid=6869, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:05:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-06-05 06:05:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 11778. [2021-06-05 06:05:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11778 states, 11777 states have (on average 3.335399507514647) internal successors, (39281), 11777 states have internal predecessors, (39281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11778 states to 11778 states and 39281 transitions. [2021-06-05 06:05:46,828 INFO L78 Accepts]: Start accepts. Automaton has 11778 states and 39281 transitions. Word has length 36 [2021-06-05 06:05:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:46,828 INFO L482 AbstractCegarLoop]: Abstraction has 11778 states and 39281 transitions. [2021-06-05 06:05:46,828 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) [2021-06-05 06:05:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 11778 states and 39281 transitions. [2021-06-05 06:05:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:46,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:46,842 INFO L521 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] [2021-06-05 06:05:47,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:05:47,043 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 242460745, now seen corresponding path program 175 times [2021-06-05 06:05:47,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:47,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701754619] [2021-06-05 06:05:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:47,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701754619] [2021-06-05 06:05:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701754619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017351431] [2021-06-05 06:05:47,421 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 [2021-06-05 06:05:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:05:47,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:48,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017351431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:48,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:48,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 06:05:48,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454831645] [2021-06-05 06:05:48,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:05:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:05:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:05:48,073 INFO L87 Difference]: Start difference. First operand 11778 states and 39281 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) [2021-06-05 06:05:50,647 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 06:05:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:51,447 INFO L93 Difference]: Finished difference Result 13752 states and 44667 transitions. [2021-06-05 06:05:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 06:05:51,447 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 [2021-06-05 06:05:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:51,471 INFO L225 Difference]: With dead ends: 13752 [2021-06-05 06:05:51,471 INFO L226 Difference]: Without dead ends: 13537 [2021-06-05 06:05:51,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2985.1ms TimeCoverageRelationStatistics Valid=963, Invalid=6009, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:05:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13537 states. [2021-06-05 06:05:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13537 to 11802. [2021-06-05 06:05:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11802 states, 11801 states have (on average 3.334717396830777) internal successors, (39353), 11801 states have internal predecessors, (39353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11802 states to 11802 states and 39353 transitions. [2021-06-05 06:05:51,714 INFO L78 Accepts]: Start accepts. Automaton has 11802 states and 39353 transitions. Word has length 36 [2021-06-05 06:05:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:51,714 INFO L482 AbstractCegarLoop]: Abstraction has 11802 states and 39353 transitions. [2021-06-05 06:05:51,714 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) [2021-06-05 06:05:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11802 states and 39353 transitions. [2021-06-05 06:05:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:51,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:51,728 INFO L521 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] [2021-06-05 06:05:51,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 06:05:51,929 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1664425911, now seen corresponding path program 176 times [2021-06-05 06:05:51,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:51,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309717938] [2021-06-05 06:05:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:52,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309717938] [2021-06-05 06:05:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309717938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998362816] [2021-06-05 06:05:52,293 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 [2021-06-05 06:05:52,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:05:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:05:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:05:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998362816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:52,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:05:52,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-06-05 06:05:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840786134] [2021-06-05 06:05:52,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 06:05:52,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:05:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 06:05:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:05:52,890 INFO L87 Difference]: Start difference. First operand 11802 states and 39353 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) [2021-06-05 06:05:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:05:58,577 INFO L93 Difference]: Finished difference Result 18328 states and 58520 transitions. [2021-06-05 06:05:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 06:05:58,578 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 [2021-06-05 06:05:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:05:58,609 INFO L225 Difference]: With dead ends: 18328 [2021-06-05 06:05:58,610 INFO L226 Difference]: Without dead ends: 18047 [2021-06-05 06:05:58,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 4662.6ms TimeCoverageRelationStatistics Valid=1878, Invalid=11004, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 06:05:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18047 states. [2021-06-05 06:05:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18047 to 11858. [2021-06-05 06:05:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11858 states, 11857 states have (on average 3.3380281690140845) internal successors, (39579), 11857 states have internal predecessors, (39579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:05:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11858 states to 11858 states and 39579 transitions. [2021-06-05 06:05:58,880 INFO L78 Accepts]: Start accepts. Automaton has 11858 states and 39579 transitions. Word has length 36 [2021-06-05 06:05:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:05:58,880 INFO L482 AbstractCegarLoop]: Abstraction has 11858 states and 39579 transitions. [2021-06-05 06:05:58,880 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) [2021-06-05 06:05:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 11858 states and 39579 transitions. [2021-06-05 06:05:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:05:58,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:05:58,895 INFO L521 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] [2021-06-05 06:05:59,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1380 [2021-06-05 06:05:59,096 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:05:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:05:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1873465715, now seen corresponding path program 177 times [2021-06-05 06:05:59,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:05:59,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168032550] [2021-06-05 06:05:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:05:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:05:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:05:59,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:05:59,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168032550] [2021-06-05 06:05:59,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168032550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:05:59,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076932242] [2021-06-05 06:05:59,389 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 [2021-06-05 06:05:59,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:05:59,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:05:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:05:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:00,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076932242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:00,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:00,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:06:00,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375885324] [2021-06-05 06:06:00,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:06:00,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:00,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:06:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:06:00,029 INFO L87 Difference]: Start difference. First operand 11858 states and 39579 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) [2021-06-05 06:06:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:02,896 INFO L93 Difference]: Finished difference Result 14589 states and 47328 transitions. [2021-06-05 06:06:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:06:02,897 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 [2021-06-05 06:06:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:02,920 INFO L225 Difference]: With dead ends: 14589 [2021-06-05 06:06:02,920 INFO L226 Difference]: Without dead ends: 14393 [2021-06-05 06:06:02,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2437.5ms TimeCoverageRelationStatistics Valid=778, Invalid=5228, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:06:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14393 states. [2021-06-05 06:06:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14393 to 11861. [2021-06-05 06:06:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 3.3387015177065766) internal successors, (39597), 11860 states have internal predecessors, (39597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 39597 transitions. [2021-06-05 06:06:03,123 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 39597 transitions. Word has length 36 [2021-06-05 06:06:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:03,124 INFO L482 AbstractCegarLoop]: Abstraction has 11861 states and 39597 transitions. [2021-06-05 06:06:03,124 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) [2021-06-05 06:06:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 39597 transitions. [2021-06-05 06:06:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:06:03,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:03,137 INFO L521 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] [2021-06-05 06:06:03,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:03,341 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1389969701, now seen corresponding path program 178 times [2021-06-05 06:06:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:03,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532570794] [2021-06-05 06:06:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:03,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:03,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532570794] [2021-06-05 06:06:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532570794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896021226] [2021-06-05 06:06:03,719 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 [2021-06-05 06:06:03,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:06:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:04,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896021226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:04,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:04,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:06:04,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777278509] [2021-06-05 06:06:04,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:06:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:06:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:06:04,364 INFO L87 Difference]: Start difference. First operand 11861 states and 39597 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) [2021-06-05 06:06:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:06,638 INFO L93 Difference]: Finished difference Result 15587 states and 51043 transitions. [2021-06-05 06:06:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:06:06,638 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 [2021-06-05 06:06:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:06,664 INFO L225 Difference]: With dead ends: 15587 [2021-06-05 06:06:06,664 INFO L226 Difference]: Without dead ends: 15418 [2021-06-05 06:06:06,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1991.7ms TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:06:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15418 states. [2021-06-05 06:06:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15418 to 11844. [2021-06-05 06:06:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11844 states, 11843 states have (on average 3.3374989445241914) internal successors, (39526), 11843 states have internal predecessors, (39526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11844 states to 11844 states and 39526 transitions. [2021-06-05 06:06:06,887 INFO L78 Accepts]: Start accepts. Automaton has 11844 states and 39526 transitions. Word has length 36 [2021-06-05 06:06:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:06,887 INFO L482 AbstractCegarLoop]: Abstraction has 11844 states and 39526 transitions. [2021-06-05 06:06:06,887 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) [2021-06-05 06:06:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11844 states and 39526 transitions. [2021-06-05 06:06:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:06:06,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:06,902 INFO L521 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] [2021-06-05 06:06:07,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 06:06:07,103 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1420539917, now seen corresponding path program 179 times [2021-06-05 06:06:07,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:07,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34790505] [2021-06-05 06:06:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:07,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:07,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34790505] [2021-06-05 06:06:07,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34790505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:07,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284246114] [2021-06-05 06:06:07,359 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 [2021-06-05 06:06:07,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:06:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:06:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:07,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284246114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:07,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:07,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:06:07,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861793896] [2021-06-05 06:06:07,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:06:07,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:06:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:06:07,979 INFO L87 Difference]: Start difference. First operand 11844 states and 39526 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) [2021-06-05 06:06:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:09,922 INFO L93 Difference]: Finished difference Result 21602 states and 70452 transitions. [2021-06-05 06:06:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:06:09,922 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 [2021-06-05 06:06:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:09,959 INFO L225 Difference]: With dead ends: 21602 [2021-06-05 06:06:09,959 INFO L226 Difference]: Without dead ends: 21522 [2021-06-05 06:06:09,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1605.9ms TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:06:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21522 states. [2021-06-05 06:06:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21522 to 12142. [2021-06-05 06:06:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12142 states, 12141 states have (on average 3.341405156082695) internal successors, (40568), 12141 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12142 states to 12142 states and 40568 transitions. [2021-06-05 06:06:10,232 INFO L78 Accepts]: Start accepts. Automaton has 12142 states and 40568 transitions. Word has length 36 [2021-06-05 06:06:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:10,232 INFO L482 AbstractCegarLoop]: Abstraction has 12142 states and 40568 transitions. [2021-06-05 06:06:10,232 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) [2021-06-05 06:06:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 12142 states and 40568 transitions. [2021-06-05 06:06:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:06:10,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:10,247 INFO L521 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] [2021-06-05 06:06:10,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:10,447 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:10,448 INFO L82 PathProgramCache]: Analyzing trace with hash 467803489, now seen corresponding path program 180 times [2021-06-05 06:06:10,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:10,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571064650] [2021-06-05 06:06:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:10,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:10,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571064650] [2021-06-05 06:06:10,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571064650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:10,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081669167] [2021-06-05 06:06:10,825 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 [2021-06-05 06:06:10,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:06:10,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:06:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081669167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:11,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:11,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-06-05 06:06:11,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189260674] [2021-06-05 06:06:11,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:06:11,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:06:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:06:11,470 INFO L87 Difference]: Start difference. First operand 12142 states and 40568 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) [2021-06-05 06:06:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:14,965 INFO L93 Difference]: Finished difference Result 25038 states and 81053 transitions. [2021-06-05 06:06:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 06:06:14,965 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 [2021-06-05 06:06:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:15,008 INFO L225 Difference]: With dead ends: 25038 [2021-06-05 06:06:15,008 INFO L226 Difference]: Without dead ends: 24894 [2021-06-05 06:06:15,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 3211.3ms TimeCoverageRelationStatistics Valid=1203, Invalid=5603, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 06:06:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-06-05 06:06:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 12144. [2021-06-05 06:06:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12144 states, 12143 states have (on average 3.3383842543028908) internal successors, (40538), 12143 states have internal predecessors, (40538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12144 states to 12144 states and 40538 transitions. [2021-06-05 06:06:15,301 INFO L78 Accepts]: Start accepts. Automaton has 12144 states and 40538 transitions. Word has length 36 [2021-06-05 06:06:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:15,301 INFO L482 AbstractCegarLoop]: Abstraction has 12144 states and 40538 transitions. [2021-06-05 06:06:15,301 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) [2021-06-05 06:06:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 12144 states and 40538 transitions. [2021-06-05 06:06:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:06:15,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:15,316 INFO L521 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] [2021-06-05 06:06:15,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:15,517 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1192840929, now seen corresponding path program 181 times [2021-06-05 06:06:15,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:15,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539833024] [2021-06-05 06:06:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:15,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:15,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539833024] [2021-06-05 06:06:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539833024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:15,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470353787] [2021-06-05 06:06:15,876 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:06:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:16,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470353787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:16,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:16,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 06:06:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48743496] [2021-06-05 06:06:16,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:06:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:06:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:06:16,611 INFO L87 Difference]: Start difference. First operand 12144 states and 40538 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) [2021-06-05 06:06:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:18,792 INFO L93 Difference]: Finished difference Result 20977 states and 68569 transitions. [2021-06-05 06:06:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:06:18,792 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 [2021-06-05 06:06:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:18,827 INFO L225 Difference]: With dead ends: 20977 [2021-06-05 06:06:18,827 INFO L226 Difference]: Without dead ends: 20857 [2021-06-05 06:06:18,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2123.5ms TimeCoverageRelationStatistics Valid=606, Invalid=3054, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:06:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-06-05 06:06:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 12189. [2021-06-05 06:06:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12189 states, 12188 states have (on average 3.338037413849688) internal successors, (40684), 12188 states have internal predecessors, (40684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12189 states to 12189 states and 40684 transitions. [2021-06-05 06:06:19,078 INFO L78 Accepts]: Start accepts. Automaton has 12189 states and 40684 transitions. Word has length 36 [2021-06-05 06:06:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:19,078 INFO L482 AbstractCegarLoop]: Abstraction has 12189 states and 40684 transitions. [2021-06-05 06:06:19,078 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) [2021-06-05 06:06:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 12189 states and 40684 transitions. [2021-06-05 06:06:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 06:06:19,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:19,093 INFO L521 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] [2021-06-05 06:06:19,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-06-05 06:06:19,294 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1184665001, now seen corresponding path program 182 times [2021-06-05 06:06:19,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:19,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644081468] [2021-06-05 06:06:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:19,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:19,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644081468] [2021-06-05 06:06:19,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644081468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:19,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483359448] [2021-06-05 06:06:19,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:19,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:06:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:20,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483359448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:20,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:20,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 06:06:20,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39230162] [2021-06-05 06:06:20,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:06:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:06:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:06:20,202 INFO L87 Difference]: Start difference. First operand 12189 states and 40684 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) Received shutdown request... [2021-06-05 06:06:20,411 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 06:06:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:06:20,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:20,612 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:06:20,613 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:06:20,615 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:06:20,615 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:06:20 BasicIcfg [2021-06-05 06:06:20,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:06:20,615 INFO L168 Benchmark]: Toolchain (without parser) took 744916.25 ms. Allocated memory was 339.7 MB in the beginning and 1.9 GB in the end (delta: 1.5 GB). Free memory was 318.9 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 131.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:06:20,616 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 339.7 MB. Free memory was 320.1 MB in the beginning and 320.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:06:20,616 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.00 ms. Allocated memory is still 339.7 MB. Free memory was 318.8 MB in the beginning and 317.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:06:20,616 INFO L168 Benchmark]: Boogie Preprocessor took 24.06 ms. Allocated memory is still 339.7 MB. Free memory was 317.4 MB in the beginning and 316.4 MB in the end (delta: 983.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:06:20,616 INFO L168 Benchmark]: RCFGBuilder took 411.41 ms. Allocated memory is still 339.7 MB. Free memory was 316.3 MB in the beginning and 302.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:06:20,616 INFO L168 Benchmark]: TraceAbstraction took 744443.77 ms. Allocated memory was 339.7 MB in the beginning and 1.9 GB in the end (delta: 1.5 GB). Free memory was 301.5 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 114.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:06:20,616 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 0.16 ms. Allocated memory is still 339.7 MB. Free memory was 320.1 MB in the beginning and 320.0 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.00 ms. Allocated memory is still 339.7 MB. Free memory was 318.8 MB in the beginning and 317.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.06 ms. Allocated memory is still 339.7 MB. Free memory was 317.4 MB in the beginning and 316.4 MB in the end (delta: 983.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 411.41 ms. Allocated memory is still 339.7 MB. Free memory was 316.3 MB in the beginning and 302.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 744443.77 ms. Allocated memory was 339.7 MB in the beginning and 1.9 GB in the end (delta: 1.5 GB). Free memory was 301.5 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 114.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (12189states) and FLOYD_HOARE automaton (currently 14 states, 36 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 12ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (12189states) and FLOYD_HOARE automaton (currently 14 states, 36 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 12ms.. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (12189states) and FLOYD_HOARE automaton (currently 14 states, 36 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 12ms.. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (12189states) and FLOYD_HOARE automaton (currently 14 states, 36 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 29 for 12ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 744299.9ms, OverallIterations: 185, TraceHistogramMax: 4, EmptinessCheckTime: 2192.7ms, AutomataDifference: 496963.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6045 SDtfs, 66455 SDslu, 88423 SDs, 0 SdLazy, 379663 SolverSat, 31978 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 155894.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16230 GetRequests, 3408 SyntacticMatches, 363 SemanticMatches, 12458 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290690 ImplicationChecksByTransitivity, 425628.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12189occurred in iteration=184, InterpolantAutomatonStates: 11024, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36099.1ms AutomataMinimizationTime, 184 MinimizatonAttempts, 883450 StatesRemovedByMinimization, 182 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 650.7ms SsaConstructionTime, 1839.5ms SatisfiabilityAnalysisTime, 166071.8ms InterpolantComputationTime, 12838 NumberOfCodeBlocks, 12838 NumberOfCodeBlocksAsserted, 767 NumberOfCheckSat, 12472 ConstructedInterpolants, 0 QuantifiedInterpolants, 293590 SizeOfPredicates, 1216 NumberOfNonLiveVariables, 11619 ConjunctsInSsa, 3839 ConjunctsInUnsatCore, 366 InterpolantComputations, 4 PerfectInterpolantSequences, 136/6658 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