/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:00:56,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:00:56,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:00:56,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:00:56,752 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 [2021-08-12 19:00:56,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:00:56,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:00:56,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:00:56,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:00:56,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:00:56,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:00:56,791 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:00:56,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:00:56,792 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:00:56,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:00:56,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:00:56,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:00:56,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:00:56,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:00:56,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:00:56,793 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:00:56,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:00:56,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:00:56,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:00:56,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:00:56,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:00:56,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:00:56,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:00:56,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:00:56,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:00:56,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:00:56,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:00:56,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:00:56,795 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:00:56,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:00:56,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:00:57,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:00:57,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:00:57,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:00:57,077 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:00:57,078 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:00:57,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl [2021-08-12 19:00:57,093 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl' [2021-08-12 19:00:57,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:00:57,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:00:57,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:00:57,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:00:57,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:00:57,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:00:57,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:00:57,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:00:57,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:00:57,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/1) ... [2021-08-12 19:00:57,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:00:57,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:00:57,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:00:57,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:00:57,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (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 [2021-08-12 19:00:57,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:00:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:00:57,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:00:57,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:00:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:00:57,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:00:57,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:00:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:00:57,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:00:57,229 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:00:57,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:00:57,358 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:00:57,359 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:00:57 BoogieIcfgContainer [2021-08-12 19:00:57,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:00:57,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:00:57,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:00:57,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:00:57,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:00:57" (1/2) ... [2021-08-12 19:00:57,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434fb025 and model type exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:00:57, skipping insertion in model container [2021-08-12 19:00:57,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:00:57" (2/2) ... [2021-08-12 19:00:57,364 INFO L111 eAbstractionObserver]: Analyzing ICFG exp1x3.wvr.bpl [2021-08-12 19:00:57,368 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:00:57,368 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:00:57,369 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:00:57,388 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:00:57,416 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:00:57,430 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:00:57,430 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:00:57,430 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:00:57,430 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:00:57,430 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:00:57,431 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:00:57,431 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:00:57,431 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:00:57,453 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-08-12 19:00:57,468 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:00:57,481 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:57,482 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:57,482 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash -64585232, now seen corresponding path program 1 times [2021-08-12 19:00:57,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:57,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983741682] [2021-08-12 19:00:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:57,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983741682] [2021-08-12 19:00:57,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983741682] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:00:57,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:00:57,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:00:57,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704570034] [2021-08-12 19:00:57,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:00:57,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:00:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:00:57,636 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:57,695 INFO L93 Difference]: Finished difference Result 58 states and 107 transitions. [2021-08-12 19:00:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:00:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-12 19:00:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:57,706 INFO L225 Difference]: With dead ends: 58 [2021-08-12 19:00:57,706 INFO L226 Difference]: Without dead ends: 47 [2021-08-12 19:00:57,708 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:00:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-12 19:00:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-08-12 19:00:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-08-12 19:00:57,744 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-08-12 19:00:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:57,746 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-08-12 19:00:57,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-08-12 19:00:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:00:57,747 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:57,747 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:57,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:00:57,748 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:57,752 INFO L82 PathProgramCache]: Analyzing trace with hash 732040690, now seen corresponding path program 1 times [2021-08-12 19:00:57,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:57,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744113494] [2021-08-12 19:00:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:57,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:57,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744113494] [2021-08-12 19:00:57,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744113494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:57,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668794634] [2021-08-12 19:00:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:00:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:57,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668794634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:57,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:57,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-12 19:00:57,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363735136] [2021-08-12 19:00:57,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:00:57,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:00:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:00:57,968 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:58,068 INFO L93 Difference]: Finished difference Result 87 states and 158 transitions. [2021-08-12 19:00:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:00:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:00:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:58,077 INFO L225 Difference]: With dead ends: 87 [2021-08-12 19:00:58,077 INFO L226 Difference]: Without dead ends: 68 [2021-08-12 19:00:58,078 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:00:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-12 19:00:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-08-12 19:00:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-08-12 19:00:58,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-08-12 19:00:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:58,083 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-08-12 19:00:58,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-08-12 19:00:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:00:58,084 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:58,084 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:58,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 19:00:58,297 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845998, now seen corresponding path program 1 times [2021-08-12 19:00:58,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:58,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565110380] [2021-08-12 19:00:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:58,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:58,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565110380] [2021-08-12 19:00:58,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565110380] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:00:58,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:00:58,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:00:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515279152] [2021-08-12 19:00:58,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:00:58,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:00:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:00:58,329 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:58,355 INFO L93 Difference]: Finished difference Result 66 states and 120 transitions. [2021-08-12 19:00:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:00:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:00:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:58,356 INFO L225 Difference]: With dead ends: 66 [2021-08-12 19:00:58,356 INFO L226 Difference]: Without dead ends: 40 [2021-08-12 19:00:58,357 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:00:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-12 19:00:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-08-12 19:00:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 69 transitions. [2021-08-12 19:00:58,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 69 transitions. Word has length 13 [2021-08-12 19:00:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:58,361 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 69 transitions. [2021-08-12 19:00:58,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 69 transitions. [2021-08-12 19:00:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-12 19:00:58,362 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:58,362 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:58,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:00:58,362 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1306103410, now seen corresponding path program 2 times [2021-08-12 19:00:58,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:58,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529732965] [2021-08-12 19:00:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:58,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529732965] [2021-08-12 19:00:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529732965] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:00:58,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:00:58,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:00:58,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640672020] [2021-08-12 19:00:58,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:00:58,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:00:58,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:58,387 INFO L87 Difference]: Start difference. First operand 37 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:58,412 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-08-12 19:00:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:00:58,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-12 19:00:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:58,414 INFO L225 Difference]: With dead ends: 59 [2021-08-12 19:00:58,414 INFO L226 Difference]: Without dead ends: 44 [2021-08-12 19:00:58,414 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-12 19:00:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-08-12 19:00:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-08-12 19:00:58,418 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-08-12 19:00:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:58,418 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-08-12 19:00:58,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-08-12 19:00:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:00:58,419 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:58,419 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:58,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:00:58,419 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:58,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788944, now seen corresponding path program 1 times [2021-08-12 19:00:58,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:58,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357080844] [2021-08-12 19:00:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:58,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:58,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357080844] [2021-08-12 19:00:58,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357080844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:58,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284328808] [2021-08-12 19:00:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:00:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:58,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:00:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:58,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284328808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:58,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:58,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-12 19:00:58,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934644284] [2021-08-12 19:00:58,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:00:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:00:58,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:58,571 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:58,632 INFO L93 Difference]: Finished difference Result 99 states and 187 transitions. [2021-08-12 19:00:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:00:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:00:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:58,636 INFO L225 Difference]: With dead ends: 99 [2021-08-12 19:00:58,636 INFO L226 Difference]: Without dead ends: 90 [2021-08-12 19:00:58,636 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:00:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-12 19:00:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-08-12 19:00:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-08-12 19:00:58,645 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2021-08-12 19:00:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:58,645 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-08-12 19:00:58,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-08-12 19:00:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:00:58,646 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:58,646 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:58,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:58,847 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:58,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356592, now seen corresponding path program 2 times [2021-08-12 19:00:58,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:58,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392964085] [2021-08-12 19:00:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:00:58,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:58,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392964085] [2021-08-12 19:00:58,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392964085] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:00:58,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:00:58,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:00:58,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923228052] [2021-08-12 19:00:58,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:00:58,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:00:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:00:58,895 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:58,939 INFO L93 Difference]: Finished difference Result 117 states and 232 transitions. [2021-08-12 19:00:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:00:58,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:00:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:58,941 INFO L225 Difference]: With dead ends: 117 [2021-08-12 19:00:58,941 INFO L226 Difference]: Without dead ends: 108 [2021-08-12 19:00:58,942 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:00:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-12 19:00:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-08-12 19:00:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-08-12 19:00:58,958 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 15 [2021-08-12 19:00:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:58,958 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-08-12 19:00:58,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-08-12 19:00:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:58,959 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:58,959 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:58,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 19:00:58,959 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:58,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288690, now seen corresponding path program 3 times [2021-08-12 19:00:58,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:58,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94430651] [2021-08-12 19:00:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:59,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:59,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94430651] [2021-08-12 19:00:59,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94430651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:59,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370452119] [2021-08-12 19:00:59,012 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 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 [2021-08-12 19:00:59,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:00:59,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:59,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:00:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:59,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370452119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:59,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:59,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:00:59,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972578785] [2021-08-12 19:00:59,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:00:59,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:00:59,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:00:59,110 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:59,390 INFO L93 Difference]: Finished difference Result 177 states and 358 transitions. [2021-08-12 19:00:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:00:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:00:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:59,392 INFO L225 Difference]: With dead ends: 177 [2021-08-12 19:00:59,393 INFO L226 Difference]: Without dead ends: 164 [2021-08-12 19:00:59,393 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:00:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-12 19:00:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2021-08-12 19:00:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-08-12 19:00:59,403 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2021-08-12 19:00:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:59,403 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-08-12 19:00:59,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-08-12 19:00:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:59,404 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:59,404 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:59,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:59,605 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:59,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643090, now seen corresponding path program 4 times [2021-08-12 19:00:59,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:59,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171205649] [2021-08-12 19:00:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:59,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:59,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171205649] [2021-08-12 19:00:59,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171205649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:59,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462692031] [2021-08-12 19:00:59,633 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 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 [2021-08-12 19:00:59,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:59,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:00:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462692031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:59,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:59,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:00:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412456121] [2021-08-12 19:00:59,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:00:59,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:00:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:00:59,775 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:59,927 INFO L93 Difference]: Finished difference Result 182 states and 346 transitions. [2021-08-12 19:00:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:00:59,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:00:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:59,929 INFO L225 Difference]: With dead ends: 182 [2021-08-12 19:00:59,929 INFO L226 Difference]: Without dead ends: 153 [2021-08-12 19:00:59,929 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:00:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-12 19:00:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-08-12 19:00:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 103 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 222 transitions. [2021-08-12 19:00:59,935 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 222 transitions. Word has length 17 [2021-08-12 19:00:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:59,935 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 222 transitions. [2021-08-12 19:00:59,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 222 transitions. [2021-08-12 19:00:59,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:00:59,936 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:59,936 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:00,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:00,150 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:00,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1781820862, now seen corresponding path program 5 times [2021-08-12 19:01:00,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:00,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502964397] [2021-08-12 19:01:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502964397] [2021-08-12 19:01:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502964397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766055470] [2021-08-12 19:01:00,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:00,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:01:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:00,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766055470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:00,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:00,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898419524] [2021-08-12 19:01:00,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:00,325 INFO L87 Difference]: Start difference. First operand 104 states and 222 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:00,469 INFO L93 Difference]: Finished difference Result 162 states and 316 transitions. [2021-08-12 19:01:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:01:00,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:00,471 INFO L225 Difference]: With dead ends: 162 [2021-08-12 19:01:00,471 INFO L226 Difference]: Without dead ends: 147 [2021-08-12 19:01:00,472 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:01:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-12 19:01:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-08-12 19:01:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 217 transitions. [2021-08-12 19:01:00,478 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 217 transitions. Word has length 17 [2021-08-12 19:01:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:00,478 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 217 transitions. [2021-08-12 19:01:00,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 217 transitions. [2021-08-12 19:01:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:00,479 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:00,479 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:00,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:00,695 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:00,696 INFO L82 PathProgramCache]: Analyzing trace with hash 397922780, now seen corresponding path program 6 times [2021-08-12 19:01:00,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:00,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593098022] [2021-08-12 19:01:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593098022] [2021-08-12 19:01:00,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593098022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830984996] [2021-08-12 19:01:00,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:00,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:01:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830984996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:00,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:00,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593917123] [2021-08-12 19:01:00,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:00,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:00,844 INFO L87 Difference]: Start difference. First operand 103 states and 217 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:00,929 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-08-12 19:01:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:01:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:00,930 INFO L225 Difference]: With dead ends: 127 [2021-08-12 19:01:00,931 INFO L226 Difference]: Without dead ends: 112 [2021-08-12 19:01:00,931 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-12 19:01:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-08-12 19:01:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2021-08-12 19:01:00,938 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 17 [2021-08-12 19:01:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:00,938 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2021-08-12 19:01:00,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2021-08-12 19:01:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:00,939 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:00,939 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:01,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:01,145 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 613173682, now seen corresponding path program 7 times [2021-08-12 19:01:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:01,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363745189] [2021-08-12 19:01:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:01,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:01,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363745189] [2021-08-12 19:01:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363745189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:01,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108926222] [2021-08-12 19:01:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108926222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:01,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:01,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937390219] [2021-08-12 19:01:01,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:01,301 INFO L87 Difference]: Start difference. First operand 103 states and 216 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-12 19:01:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:01,472 INFO L93 Difference]: Finished difference Result 221 states and 434 transitions. [2021-08-12 19:01:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:01:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 17 [2021-08-12 19:01:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:01,474 INFO L225 Difference]: With dead ends: 221 [2021-08-12 19:01:01,474 INFO L226 Difference]: Without dead ends: 208 [2021-08-12 19:01:01,474 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:01:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-12 19:01:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 124. [2021-08-12 19:01:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.186991869918699) internal successors, (269), 123 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 269 transitions. [2021-08-12 19:01:01,480 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 269 transitions. Word has length 17 [2021-08-12 19:01:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:01,480 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 269 transitions. [2021-08-12 19:01:01,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-12 19:01:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 269 transitions. [2021-08-12 19:01:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:01,481 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:01,481 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:01,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:01,697 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978990, now seen corresponding path program 8 times [2021-08-12 19:01:01,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:01,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071375197] [2021-08-12 19:01:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:01,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071375197] [2021-08-12 19:01:01,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071375197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497959909] [2021-08-12 19:01:01,729 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 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 [2021-08-12 19:01:01,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:01,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:01,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497959909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:01,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:01,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:01,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946705661] [2021-08-12 19:01:01,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:01,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:01,795 INFO L87 Difference]: Start difference. First operand 124 states and 269 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-12 19:01:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:01,927 INFO L93 Difference]: Finished difference Result 160 states and 318 transitions. [2021-08-12 19:01:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:01:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:01,929 INFO L225 Difference]: With dead ends: 160 [2021-08-12 19:01:01,929 INFO L226 Difference]: Without dead ends: 142 [2021-08-12 19:01:01,929 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-12 19:01:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-08-12 19:01:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.191666666666667) internal successors, (263), 120 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 263 transitions. [2021-08-12 19:01:01,938 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 263 transitions. Word has length 17 [2021-08-12 19:01:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:01,938 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 263 transitions. [2021-08-12 19:01:01,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-12 19:01:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 263 transitions. [2021-08-12 19:01:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:01,938 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:01,939 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:02,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-12 19:01:02,155 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash 51051130, now seen corresponding path program 9 times [2021-08-12 19:01:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:02,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992301777] [2021-08-12 19:01:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:02,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992301777] [2021-08-12 19:01:02,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992301777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125203472] [2021-08-12 19:01:02,181 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 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 [2021-08-12 19:01:02,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:01:02,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:02,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125203472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:02,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:02,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421836365] [2021-08-12 19:01:02,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:02,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:02,268 INFO L87 Difference]: Start difference. First operand 121 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-08-12 19:01:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:02,418 INFO L93 Difference]: Finished difference Result 180 states and 362 transitions. [2021-08-12 19:01:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:01:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:02,421 INFO L225 Difference]: With dead ends: 180 [2021-08-12 19:01:02,421 INFO L226 Difference]: Without dead ends: 165 [2021-08-12 19:01:02,421 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:01:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-12 19:01:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-08-12 19:01:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-08-12 19:01:02,429 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 17 [2021-08-12 19:01:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:02,429 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-08-12 19:01:02,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-08-12 19:01:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-08-12 19:01:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:02,430 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:02,430 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:02,645 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846952, now seen corresponding path program 10 times [2021-08-12 19:01:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695389019] [2021-08-12 19:01:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:02,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:02,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695389019] [2021-08-12 19:01:02,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695389019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:02,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172372774] [2021-08-12 19:01:02,667 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 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 [2021-08-12 19:01:02,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:02,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:02,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172372774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:02,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:02,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:02,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287403867] [2021-08-12 19:01:02,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:02,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:02,758 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-08-12 19:01:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:02,865 INFO L93 Difference]: Finished difference Result 212 states and 407 transitions. [2021-08-12 19:01:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:01:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:02,866 INFO L225 Difference]: With dead ends: 212 [2021-08-12 19:01:02,866 INFO L226 Difference]: Without dead ends: 197 [2021-08-12 19:01:02,868 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-12 19:01:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2021-08-12 19:01:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-08-12 19:01:02,874 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 17 [2021-08-12 19:01:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:02,874 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-08-12 19:01:02,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-08-12 19:01:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-08-12 19:01:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:02,875 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:02,875 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:03,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:03,094 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142718, now seen corresponding path program 11 times [2021-08-12 19:01:03,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:03,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056382241] [2021-08-12 19:01:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:03,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:03,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056382241] [2021-08-12 19:01:03,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056382241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:03,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921683053] [2021-08-12 19:01:03,126 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 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 [2021-08-12 19:01:03,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:01:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:03,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921683053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:03,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:03,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:03,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375747844] [2021-08-12 19:01:03,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:03,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:03,208 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:03,399 INFO L93 Difference]: Finished difference Result 198 states and 419 transitions. [2021-08-12 19:01:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:01:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:03,401 INFO L225 Difference]: With dead ends: 198 [2021-08-12 19:01:03,401 INFO L226 Difference]: Without dead ends: 174 [2021-08-12 19:01:03,403 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:01:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-12 19:01:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2021-08-12 19:01:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1769230769230767) internal successors, (283), 130 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 283 transitions. [2021-08-12 19:01:03,409 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 283 transitions. Word has length 17 [2021-08-12 19:01:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:03,409 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 283 transitions. [2021-08-12 19:01:03,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 283 transitions. [2021-08-12 19:01:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:01:03,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:03,411 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:03,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:01:03,625 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193218, now seen corresponding path program 12 times [2021-08-12 19:01:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297089742] [2021-08-12 19:01:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:03,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:03,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297089742] [2021-08-12 19:01:03,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297089742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:03,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108842152] [2021-08-12 19:01:03,645 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 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 [2021-08-12 19:01:03,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:01:03,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:03,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:01:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:03,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108842152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:03,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:03,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:01:03,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865290406] [2021-08-12 19:01:03,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:03,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:03,725 INFO L87 Difference]: Start difference. First operand 131 states and 283 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:03,854 INFO L93 Difference]: Finished difference Result 218 states and 417 transitions. [2021-08-12 19:01:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:01:03,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:01:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:03,855 INFO L225 Difference]: With dead ends: 218 [2021-08-12 19:01:03,855 INFO L226 Difference]: Without dead ends: 199 [2021-08-12 19:01:03,857 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-12 19:01:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-08-12 19:01:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1417910447761193) internal successors, (287), 134 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 287 transitions. [2021-08-12 19:01:03,869 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 287 transitions. Word has length 17 [2021-08-12 19:01:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:03,869 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 287 transitions. [2021-08-12 19:01:03,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 287 transitions. [2021-08-12 19:01:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:01:03,870 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:03,870 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:04,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 19:01:04,085 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1030417008, now seen corresponding path program 13 times [2021-08-12 19:01:04,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:04,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008813129] [2021-08-12 19:01:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:04,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:04,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008813129] [2021-08-12 19:01:04,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008813129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:04,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899776680] [2021-08-12 19:01:04,120 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 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 [2021-08-12 19:01:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:04,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899776680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:04,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-12 19:01:04,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480075141] [2021-08-12 19:01:04,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:01:04,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:01:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:01:04,249 INFO L87 Difference]: Start difference. First operand 135 states and 287 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-08-12 19:01:04,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:04,357 INFO L93 Difference]: Finished difference Result 226 states and 459 transitions. [2021-08-12 19:01:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:01:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:01:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:04,359 INFO L225 Difference]: With dead ends: 226 [2021-08-12 19:01:04,359 INFO L226 Difference]: Without dead ends: 217 [2021-08-12 19:01:04,359 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:01:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-12 19:01:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-08-12 19:01:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-08-12 19:01:04,367 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 19 [2021-08-12 19:01:04,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:04,367 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-08-12 19:01:04,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-08-12 19:01:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-08-12 19:01:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:01:04,368 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:04,368 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:04,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:01:04,579 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:04,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1048749968, now seen corresponding path program 14 times [2021-08-12 19:01:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:04,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472096675] [2021-08-12 19:01:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:01:04,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472096675] [2021-08-12 19:01:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472096675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235539586] [2021-08-12 19:01:04,608 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 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 [2021-08-12 19:01:04,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:04,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:04,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:04,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235539586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:04,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:04,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-12 19:01:04,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419083507] [2021-08-12 19:01:04,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:01:04,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:04,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:01:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:04,734 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-12 19:01:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:04,891 INFO L93 Difference]: Finished difference Result 278 states and 579 transitions. [2021-08-12 19:01:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:01:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:01:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:04,893 INFO L225 Difference]: With dead ends: 278 [2021-08-12 19:01:04,893 INFO L226 Difference]: Without dead ends: 262 [2021-08-12 19:01:04,893 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:01:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-12 19:01:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-08-12 19:01:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2552083333333335) internal successors, (433), 192 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 433 transitions. [2021-08-12 19:01:04,902 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 433 transitions. Word has length 19 [2021-08-12 19:01:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:04,902 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 433 transitions. [2021-08-12 19:01:04,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-12 19:01:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 433 transitions. [2021-08-12 19:01:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:01:04,903 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:04,903 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:05,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:05,117 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -588981648, now seen corresponding path program 15 times [2021-08-12 19:01:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:05,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147610951] [2021-08-12 19:01:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:01:05,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:05,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147610951] [2021-08-12 19:01:05,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147610951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:05,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386639308] [2021-08-12 19:01:05,146 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 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 [2021-08-12 19:01:05,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:01:05,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:05,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:05,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386639308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:05,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:05,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-12 19:01:05,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238158279] [2021-08-12 19:01:05,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:01:05,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:01:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:01:05,254 INFO L87 Difference]: Start difference. First operand 193 states and 433 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:05,363 INFO L93 Difference]: Finished difference Result 278 states and 594 transitions. [2021-08-12 19:01:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:01:05,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:01:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:05,365 INFO L225 Difference]: With dead ends: 278 [2021-08-12 19:01:05,365 INFO L226 Difference]: Without dead ends: 269 [2021-08-12 19:01:05,365 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:01:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-12 19:01:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2021-08-12 19:01:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-08-12 19:01:05,376 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-08-12 19:01:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-08-12 19:01:05,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-08-12 19:01:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:05,377 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:05,377 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:05,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:05,593 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1461933170, now seen corresponding path program 16 times [2021-08-12 19:01:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:05,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20030865] [2021-08-12 19:01:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:05,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:05,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20030865] [2021-08-12 19:01:05,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20030865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:05,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044851362] [2021-08-12 19:01:05,632 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 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 [2021-08-12 19:01:05,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:05,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044851362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:05,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:05,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:01:05,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916139751] [2021-08-12 19:01:05,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:05,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:05,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:05,733 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-08-12 19:01:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:06,554 INFO L93 Difference]: Finished difference Result 456 states and 1000 transitions. [2021-08-12 19:01:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:01:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:06,557 INFO L225 Difference]: With dead ends: 456 [2021-08-12 19:01:06,557 INFO L226 Difference]: Without dead ends: 437 [2021-08-12 19:01:06,557 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:01:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-12 19:01:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 183. [2021-08-12 19:01:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2527472527472527) internal successors, (410), 182 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 410 transitions. [2021-08-12 19:01:06,568 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 410 transitions. Word has length 21 [2021-08-12 19:01:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:06,568 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 410 transitions. [2021-08-12 19:01:06,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-08-12 19:01:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 410 transitions. [2021-08-12 19:01:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:06,569 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:06,569 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:06,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:06,781 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1465011118, now seen corresponding path program 17 times [2021-08-12 19:01:06,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:06,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535912907] [2021-08-12 19:01:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:06,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:06,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535912907] [2021-08-12 19:01:06,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535912907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:06,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473830002] [2021-08-12 19:01:06,815 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 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 [2021-08-12 19:01:06,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:01:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:06,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473830002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:06,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:06,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:01:06,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742871838] [2021-08-12 19:01:06,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:06,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:06,910 INFO L87 Difference]: Start difference. First operand 183 states and 410 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-08-12 19:01:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:07,391 INFO L93 Difference]: Finished difference Result 429 states and 823 transitions. [2021-08-12 19:01:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:01:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:07,393 INFO L225 Difference]: With dead ends: 429 [2021-08-12 19:01:07,393 INFO L226 Difference]: Without dead ends: 382 [2021-08-12 19:01:07,394 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:01:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-12 19:01:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 221. [2021-08-12 19:01:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-08-12 19:01:07,409 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 21 [2021-08-12 19:01:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:07,409 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-08-12 19:01:07,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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) [2021-08-12 19:01:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-08-12 19:01:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:07,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:07,411 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:07,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 19:01:07,621 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2128550594, now seen corresponding path program 18 times [2021-08-12 19:01:07,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:07,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526562170] [2021-08-12 19:01:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:07,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526562170] [2021-08-12 19:01:07,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526562170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129507763] [2021-08-12 19:01:07,649 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 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 [2021-08-12 19:01:07,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:01:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:07,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129507763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:07,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:07,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:01:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305185459] [2021-08-12 19:01:07,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:07,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:07,741 INFO L87 Difference]: Start difference. First operand 221 states and 493 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-08-12 19:01:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:08,126 INFO L93 Difference]: Finished difference Result 386 states and 750 transitions. [2021-08-12 19:01:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:01:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:08,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:08,128 INFO L225 Difference]: With dead ends: 386 [2021-08-12 19:01:08,128 INFO L226 Difference]: Without dead ends: 371 [2021-08-12 19:01:08,128 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:01:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-12 19:01:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 218. [2021-08-12 19:01:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.225806451612903) internal successors, (483), 217 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 483 transitions. [2021-08-12 19:01:08,142 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 483 transitions. Word has length 21 [2021-08-12 19:01:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:08,142 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 483 transitions. [2021-08-12 19:01:08,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-08-12 19:01:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 483 transitions. [2021-08-12 19:01:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:08,142 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:08,142 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:08,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:01:08,351 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash 744652512, now seen corresponding path program 19 times [2021-08-12 19:01:08,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:08,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157977923] [2021-08-12 19:01:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157977923] [2021-08-12 19:01:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157977923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134715415] [2021-08-12 19:01:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:08,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134715415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:08,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:08,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:01:08,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003254180] [2021-08-12 19:01:08,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:08,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:08,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:08,464 INFO L87 Difference]: Start difference. First operand 218 states and 483 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-08-12 19:01:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:08,620 INFO L93 Difference]: Finished difference Result 251 states and 534 transitions. [2021-08-12 19:01:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:01:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:08,621 INFO L225 Difference]: With dead ends: 251 [2021-08-12 19:01:08,621 INFO L226 Difference]: Without dead ends: 236 [2021-08-12 19:01:08,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-12 19:01:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-08-12 19:01:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2211981566820276) internal successors, (482), 217 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 482 transitions. [2021-08-12 19:01:08,652 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 482 transitions. Word has length 21 [2021-08-12 19:01:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:08,652 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 482 transitions. [2021-08-12 19:01:08,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-08-12 19:01:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 482 transitions. [2021-08-12 19:01:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:08,652 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:08,653 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:08,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:01:08,853 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash -157465486, now seen corresponding path program 20 times [2021-08-12 19:01:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:08,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461053596] [2021-08-12 19:01:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:08,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:08,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461053596] [2021-08-12 19:01:08,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461053596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:08,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070912029] [2021-08-12 19:01:08,888 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 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 [2021-08-12 19:01:08,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:08,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:08,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:09,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070912029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:09,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:09,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:01:09,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889738331] [2021-08-12 19:01:09,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:09,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:09,011 INFO L87 Difference]: Start difference. First operand 218 states and 482 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:09,434 INFO L93 Difference]: Finished difference Result 644 states and 1292 transitions. [2021-08-12 19:01:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:01:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:09,437 INFO L225 Difference]: With dead ends: 644 [2021-08-12 19:01:09,437 INFO L226 Difference]: Without dead ends: 631 [2021-08-12 19:01:09,437 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:01:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-12 19:01:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 263. [2021-08-12 19:01:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.267175572519084) internal successors, (594), 262 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 594 transitions. [2021-08-12 19:01:09,455 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 594 transitions. Word has length 21 [2021-08-12 19:01:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:09,455 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 594 transitions. [2021-08-12 19:01:09,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 594 transitions. [2021-08-12 19:01:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:09,456 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:09,456 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:09,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:01:09,673 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash 545339822, now seen corresponding path program 21 times [2021-08-12 19:01:09,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:09,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526005267] [2021-08-12 19:01:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:09,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:09,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526005267] [2021-08-12 19:01:09,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526005267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:09,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541920115] [2021-08-12 19:01:09,698 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 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 [2021-08-12 19:01:09,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:01:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541920115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:09,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:09,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:01:09,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978801659] [2021-08-12 19:01:09,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:09,805 INFO L87 Difference]: Start difference. First operand 263 states and 594 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:10,208 INFO L93 Difference]: Finished difference Result 444 states and 893 transitions. [2021-08-12 19:01:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:01:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:10,210 INFO L225 Difference]: With dead ends: 444 [2021-08-12 19:01:10,210 INFO L226 Difference]: Without dead ends: 423 [2021-08-12 19:01:10,211 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:01:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-08-12 19:01:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2021-08-12 19:01:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.263358778625954) internal successors, (593), 262 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 593 transitions. [2021-08-12 19:01:10,226 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 593 transitions. Word has length 21 [2021-08-12 19:01:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:10,226 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 593 transitions. [2021-08-12 19:01:10,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 593 transitions. [2021-08-12 19:01:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:10,227 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:10,227 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:10,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 19:01:10,441 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -719588038, now seen corresponding path program 22 times [2021-08-12 19:01:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:10,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835073030] [2021-08-12 19:01:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:10,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:10,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835073030] [2021-08-12 19:01:10,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835073030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476682080] [2021-08-12 19:01:10,473 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 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 [2021-08-12 19:01:10,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:10,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:10,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476682080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:10,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:10,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:01:10,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024460524] [2021-08-12 19:01:10,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:10,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:10,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:10,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:10,564 INFO L87 Difference]: Start difference. First operand 263 states and 593 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:11,041 INFO L93 Difference]: Finished difference Result 535 states and 1088 transitions. [2021-08-12 19:01:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:01:11,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:11,043 INFO L225 Difference]: With dead ends: 535 [2021-08-12 19:01:11,043 INFO L226 Difference]: Without dead ends: 520 [2021-08-12 19:01:11,044 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:01:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-12 19:01:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 264. [2021-08-12 19:01:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.2623574144486693) internal successors, (595), 263 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 595 transitions. [2021-08-12 19:01:11,068 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 595 transitions. Word has length 21 [2021-08-12 19:01:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:11,068 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 595 transitions. [2021-08-12 19:01:11,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 595 transitions. [2021-08-12 19:01:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:11,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:11,069 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:11,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:11,285 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486120, now seen corresponding path program 23 times [2021-08-12 19:01:11,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:11,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245869109] [2021-08-12 19:01:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:11,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245869109] [2021-08-12 19:01:11,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245869109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425553056] [2021-08-12 19:01:11,324 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 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 [2021-08-12 19:01:11,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:01:11,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:11,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425553056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:11,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:11,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:01:11,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685752171] [2021-08-12 19:01:11,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:11,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:11,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:11,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:11,420 INFO L87 Difference]: Start difference. First operand 264 states and 595 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:11,751 INFO L93 Difference]: Finished difference Result 488 states and 970 transitions. [2021-08-12 19:01:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:01:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:11,753 INFO L225 Difference]: With dead ends: 488 [2021-08-12 19:01:11,753 INFO L226 Difference]: Without dead ends: 471 [2021-08-12 19:01:11,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:01:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-12 19:01:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-08-12 19:01:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.2528301886792454) internal successors, (597), 265 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 597 transitions. [2021-08-12 19:01:11,770 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 597 transitions. Word has length 21 [2021-08-12 19:01:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:11,770 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 597 transitions. [2021-08-12 19:01:11,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 597 transitions. [2021-08-12 19:01:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:11,771 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:11,771 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:11,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:01:11,985 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash 374503550, now seen corresponding path program 24 times [2021-08-12 19:01:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:11,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717617253] [2021-08-12 19:01:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:12,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:12,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717617253] [2021-08-12 19:01:12,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717617253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:12,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202234028] [2021-08-12 19:01:12,015 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 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 [2021-08-12 19:01:12,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:01:12,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:12,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:12,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202234028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:12,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:12,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:01:12,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224074012] [2021-08-12 19:01:12,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:12,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:12,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:12,125 INFO L87 Difference]: Start difference. First operand 266 states and 597 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:12,610 INFO L93 Difference]: Finished difference Result 472 states and 967 transitions. [2021-08-12 19:01:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:01:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:12,612 INFO L225 Difference]: With dead ends: 472 [2021-08-12 19:01:12,612 INFO L226 Difference]: Without dead ends: 451 [2021-08-12 19:01:12,613 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:01:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-12 19:01:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 250. [2021-08-12 19:01:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.216867469879518) internal successors, (552), 249 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 552 transitions. [2021-08-12 19:01:12,629 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 552 transitions. Word has length 21 [2021-08-12 19:01:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:12,629 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 552 transitions. [2021-08-12 19:01:12,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 552 transitions. [2021-08-12 19:01:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:12,630 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:12,630 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:12,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:12,845 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134910, now seen corresponding path program 25 times [2021-08-12 19:01:12,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:12,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678170567] [2021-08-12 19:01:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:12,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:12,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678170567] [2021-08-12 19:01:12,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678170567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:12,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332375875] [2021-08-12 19:01:12,875 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 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 [2021-08-12 19:01:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:12,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332375875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:12,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:12,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:01:12,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626870001] [2021-08-12 19:01:12,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:12,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:12,974 INFO L87 Difference]: Start difference. First operand 250 states and 552 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:13,347 INFO L93 Difference]: Finished difference Result 421 states and 826 transitions. [2021-08-12 19:01:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:01:13,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:13,350 INFO L225 Difference]: With dead ends: 421 [2021-08-12 19:01:13,350 INFO L226 Difference]: Without dead ends: 402 [2021-08-12 19:01:13,351 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:01:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-12 19:01:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-08-12 19:01:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.205533596837945) internal successors, (558), 253 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 558 transitions. [2021-08-12 19:01:13,371 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 558 transitions. Word has length 21 [2021-08-12 19:01:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:13,371 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 558 transitions. [2021-08-12 19:01:13,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 558 transitions. [2021-08-12 19:01:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:13,372 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:13,372 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:13,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:01:13,581 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash 19311986, now seen corresponding path program 26 times [2021-08-12 19:01:13,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:13,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190814651] [2021-08-12 19:01:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:13,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190814651] [2021-08-12 19:01:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190814651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947366780] [2021-08-12 19:01:13,612 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 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 [2021-08-12 19:01:13,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:13,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947366780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:13,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:13,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:01:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227345261] [2021-08-12 19:01:13,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:13,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:13,723 INFO L87 Difference]: Start difference. First operand 254 states and 558 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:14,196 INFO L93 Difference]: Finished difference Result 475 states and 974 transitions. [2021-08-12 19:01:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:01:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:14,198 INFO L225 Difference]: With dead ends: 475 [2021-08-12 19:01:14,198 INFO L226 Difference]: Without dead ends: 462 [2021-08-12 19:01:14,198 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:01:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-12 19:01:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 243. [2021-08-12 19:01:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1735537190082646) internal successors, (526), 242 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 526 transitions. [2021-08-12 19:01:14,215 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 526 transitions. Word has length 21 [2021-08-12 19:01:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:14,215 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 526 transitions. [2021-08-12 19:01:14,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 526 transitions. [2021-08-12 19:01:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:14,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:14,216 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:14,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:14,416 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1105347502, now seen corresponding path program 27 times [2021-08-12 19:01:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:14,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769861704] [2021-08-12 19:01:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:14,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769861704] [2021-08-12 19:01:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769861704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869399462] [2021-08-12 19:01:14,445 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 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 [2021-08-12 19:01:14,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:01:14,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:14,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:14,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869399462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:14,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:14,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-12 19:01:14,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172098168] [2021-08-12 19:01:14,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:14,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:14,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:14,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:14,547 INFO L87 Difference]: Start difference. First operand 243 states and 526 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:14,901 INFO L93 Difference]: Finished difference Result 346 states and 672 transitions. [2021-08-12 19:01:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:01:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:14,902 INFO L225 Difference]: With dead ends: 346 [2021-08-12 19:01:14,902 INFO L226 Difference]: Without dead ends: 322 [2021-08-12 19:01:14,903 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:01:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-12 19:01:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 228. [2021-08-12 19:01:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.185022026431718) internal successors, (496), 227 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 496 transitions. [2021-08-12 19:01:14,922 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 496 transitions. Word has length 21 [2021-08-12 19:01:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:14,922 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 496 transitions. [2021-08-12 19:01:14,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 496 transitions. [2021-08-12 19:01:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:14,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:14,923 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:15,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 19:01:15,141 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:15,141 INFO L82 PathProgramCache]: Analyzing trace with hash -701741454, now seen corresponding path program 28 times [2021-08-12 19:01:15,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:15,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874541722] [2021-08-12 19:01:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:15,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:15,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874541722] [2021-08-12 19:01:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874541722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:15,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981113615] [2021-08-12 19:01:15,166 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 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 [2021-08-12 19:01:15,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:15,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:15,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:15,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981113615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:15,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:15,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:01:15,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865095586] [2021-08-12 19:01:15,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:15,255 INFO L87 Difference]: Start difference. First operand 228 states and 496 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:15,631 INFO L93 Difference]: Finished difference Result 402 states and 782 transitions. [2021-08-12 19:01:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:01:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:15,633 INFO L225 Difference]: With dead ends: 402 [2021-08-12 19:01:15,633 INFO L226 Difference]: Without dead ends: 389 [2021-08-12 19:01:15,633 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:01:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-12 19:01:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 228. [2021-08-12 19:01:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.1806167400881056) internal successors, (495), 227 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 495 transitions. [2021-08-12 19:01:15,650 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 495 transitions. Word has length 21 [2021-08-12 19:01:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:15,650 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 495 transitions. [2021-08-12 19:01:15,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 495 transitions. [2021-08-12 19:01:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:15,650 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:15,651 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:15,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:15,865 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1063854, now seen corresponding path program 29 times [2021-08-12 19:01:15,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:15,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875969342] [2021-08-12 19:01:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:15,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:15,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875969342] [2021-08-12 19:01:15,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875969342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:15,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146029416] [2021-08-12 19:01:15,889 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 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 [2021-08-12 19:01:15,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:01:15,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:15,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:15,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:15,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146029416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:15,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:15,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:01:15,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768214104] [2021-08-12 19:01:15,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:15,976 INFO L87 Difference]: Start difference. First operand 228 states and 495 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:16,196 INFO L93 Difference]: Finished difference Result 293 states and 586 transitions. [2021-08-12 19:01:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:01:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:16,198 INFO L225 Difference]: With dead ends: 293 [2021-08-12 19:01:16,198 INFO L226 Difference]: Without dead ends: 275 [2021-08-12 19:01:16,198 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:01:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-12 19:01:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2021-08-12 19:01:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1830357142857144) internal successors, (489), 224 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 489 transitions. [2021-08-12 19:01:16,213 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 489 transitions. Word has length 21 [2021-08-12 19:01:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:16,213 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 489 transitions. [2021-08-12 19:01:16,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 489 transitions. [2021-08-12 19:01:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:16,214 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:16,214 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:16,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 19:01:16,428 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1263864006, now seen corresponding path program 30 times [2021-08-12 19:01:16,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:16,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924543505] [2021-08-12 19:01:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:16,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:16,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924543505] [2021-08-12 19:01:16,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924543505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:16,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137912879] [2021-08-12 19:01:16,455 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 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 [2021-08-12 19:01:16,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:01:16,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:16,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137912879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:16,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:16,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:01:16,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782034205] [2021-08-12 19:01:16,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:16,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:16,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:16,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:16,537 INFO L87 Difference]: Start difference. First operand 225 states and 489 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:16,902 INFO L93 Difference]: Finished difference Result 330 states and 665 transitions. [2021-08-12 19:01:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:01:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:16,903 INFO L225 Difference]: With dead ends: 330 [2021-08-12 19:01:16,903 INFO L226 Difference]: Without dead ends: 315 [2021-08-12 19:01:16,904 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:01:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-12 19:01:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2021-08-12 19:01:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1822222222222223) internal successors, (491), 225 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 491 transitions. [2021-08-12 19:01:16,919 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 491 transitions. Word has length 21 [2021-08-12 19:01:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:16,919 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 491 transitions. [2021-08-12 19:01:16,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 491 transitions. [2021-08-12 19:01:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:16,920 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:16,920 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:17,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:17,134 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1647205208, now seen corresponding path program 31 times [2021-08-12 19:01:17,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:17,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764228760] [2021-08-12 19:01:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:17,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:17,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764228760] [2021-08-12 19:01:17,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764228760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:17,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068181984] [2021-08-12 19:01:17,155 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 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 [2021-08-12 19:01:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:17,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068181984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:17,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:17,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-12 19:01:17,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659917664] [2021-08-12 19:01:17,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:17,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:17,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:17,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:17,242 INFO L87 Difference]: Start difference. First operand 226 states and 491 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:17,550 INFO L93 Difference]: Finished difference Result 380 states and 734 transitions. [2021-08-12 19:01:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:01:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:17,552 INFO L225 Difference]: With dead ends: 380 [2021-08-12 19:01:17,552 INFO L226 Difference]: Without dead ends: 365 [2021-08-12 19:01:17,552 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:01:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-12 19:01:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2021-08-12 19:01:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1777777777777776) internal successors, (490), 225 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 490 transitions. [2021-08-12 19:01:17,568 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 490 transitions. Word has length 21 [2021-08-12 19:01:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:17,568 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 490 transitions. [2021-08-12 19:01:17,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 490 transitions. [2021-08-12 19:01:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:17,568 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:17,568 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:17,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 19:01:17,784 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -169772418, now seen corresponding path program 32 times [2021-08-12 19:01:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:17,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456216542] [2021-08-12 19:01:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:17,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:17,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456216542] [2021-08-12 19:01:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456216542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:17,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548196515] [2021-08-12 19:01:17,807 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 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 [2021-08-12 19:01:17,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:17,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:17,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:17,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:17,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548196515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:17,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:17,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:01:17,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862120484] [2021-08-12 19:01:17,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:17,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:17,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:17,892 INFO L87 Difference]: Start difference. First operand 226 states and 490 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:18,749 INFO L93 Difference]: Finished difference Result 487 states and 1001 transitions. [2021-08-12 19:01:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:01:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:18,751 INFO L225 Difference]: With dead ends: 487 [2021-08-12 19:01:18,751 INFO L226 Difference]: Without dead ends: 472 [2021-08-12 19:01:18,752 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 19:01:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-12 19:01:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 230. [2021-08-12 19:01:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1746724890829694) internal successors, (498), 229 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 498 transitions. [2021-08-12 19:01:18,769 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 498 transitions. Word has length 21 [2021-08-12 19:01:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:18,769 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 498 transitions. [2021-08-12 19:01:18,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 498 transitions. [2021-08-12 19:01:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:18,769 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:18,769 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:18,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:01:18,981 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1140858942, now seen corresponding path program 33 times [2021-08-12 19:01:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:18,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202070678] [2021-08-12 19:01:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:19,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202070678] [2021-08-12 19:01:19,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202070678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858385646] [2021-08-12 19:01:19,005 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 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 [2021-08-12 19:01:19,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:01:19,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:19,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858385646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:19,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:19,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-12 19:01:19,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493162129] [2021-08-12 19:01:19,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:19,109 INFO L87 Difference]: Start difference. First operand 230 states and 498 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:19,566 INFO L93 Difference]: Finished difference Result 431 states and 823 transitions. [2021-08-12 19:01:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:01:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:01:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:19,568 INFO L225 Difference]: With dead ends: 431 [2021-08-12 19:01:19,568 INFO L226 Difference]: Without dead ends: 398 [2021-08-12 19:01:19,569 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:01:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-12 19:01:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 230. [2021-08-12 19:01:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1572052401746724) internal successors, (494), 229 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 494 transitions. [2021-08-12 19:01:19,586 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 494 transitions. Word has length 21 [2021-08-12 19:01:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:19,586 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 494 transitions. [2021-08-12 19:01:19,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 494 transitions. [2021-08-12 19:01:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:19,586 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:19,586 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:19,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 19:01:19,798 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1900542150, now seen corresponding path program 34 times [2021-08-12 19:01:19,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:19,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112373452] [2021-08-12 19:01:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:19,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:19,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112373452] [2021-08-12 19:01:19,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112373452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:19,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575162751] [2021-08-12 19:01:19,830 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 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 [2021-08-12 19:01:19,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:19,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575162751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:19,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:19,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:01:19,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220219586] [2021-08-12 19:01:19,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:19,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:19,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:19,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:19,910 INFO L87 Difference]: Start difference. First operand 230 states and 494 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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) [2021-08-12 19:01:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:20,681 INFO L93 Difference]: Finished difference Result 418 states and 883 transitions. [2021-08-12 19:01:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:01:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 21 [2021-08-12 19:01:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:20,683 INFO L225 Difference]: With dead ends: 418 [2021-08-12 19:01:20,683 INFO L226 Difference]: Without dead ends: 392 [2021-08-12 19:01:20,683 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:01:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-12 19:01:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 227. [2021-08-12 19:01:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1548672566371683) internal successors, (487), 226 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 487 transitions. [2021-08-12 19:01:20,701 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 487 transitions. Word has length 21 [2021-08-12 19:01:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:20,701 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 487 transitions. [2021-08-12 19:01:20,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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) [2021-08-12 19:01:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 487 transitions. [2021-08-12 19:01:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:01:20,702 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:20,702 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:20,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:01:20,904 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:20,904 INFO L82 PathProgramCache]: Analyzing trace with hash 913637562, now seen corresponding path program 35 times [2021-08-12 19:01:20,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:20,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456763595] [2021-08-12 19:01:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:20,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456763595] [2021-08-12 19:01:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456763595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581621224] [2021-08-12 19:01:20,945 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 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 [2021-08-12 19:01:20,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:01:20,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:01:20,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581621224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:21,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:21,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 19:01:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501302145] [2021-08-12 19:01:21,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:21,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:21,024 INFO L87 Difference]: Start difference. First operand 227 states and 487 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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) [2021-08-12 19:01:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:21,411 INFO L93 Difference]: Finished difference Result 353 states and 680 transitions. [2021-08-12 19:01:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:01:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 21 [2021-08-12 19:01:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:21,413 INFO L225 Difference]: With dead ends: 353 [2021-08-12 19:01:21,413 INFO L226 Difference]: Without dead ends: 330 [2021-08-12 19:01:21,413 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:01:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-12 19:01:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2021-08-12 19:01:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1371681415929205) internal successors, (483), 226 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 483 transitions. [2021-08-12 19:01:21,431 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 483 transitions. Word has length 21 [2021-08-12 19:01:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:21,431 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 483 transitions. [2021-08-12 19:01:21,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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) [2021-08-12 19:01:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 483 transitions. [2021-08-12 19:01:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:01:21,432 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:21,432 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:21,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 19:01:21,645 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash -459784912, now seen corresponding path program 36 times [2021-08-12 19:01:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:21,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242441036] [2021-08-12 19:01:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:21,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242441036] [2021-08-12 19:01:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242441036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748417454] [2021-08-12 19:01:21,689 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 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 [2021-08-12 19:01:21,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:01:21,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:01:21,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748417454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-08-12 19:01:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573281933] [2021-08-12 19:01:21,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:01:21,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:01:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:01:21,847 INFO L87 Difference]: Start difference. First operand 227 states and 483 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:22,113 INFO L93 Difference]: Finished difference Result 366 states and 748 transitions. [2021-08-12 19:01:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:01:22,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:01:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:22,115 INFO L225 Difference]: With dead ends: 366 [2021-08-12 19:01:22,115 INFO L226 Difference]: Without dead ends: 357 [2021-08-12 19:01:22,115 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:01:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-12 19:01:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 296. [2021-08-12 19:01:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.1796610169491526) internal successors, (643), 295 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 643 transitions. [2021-08-12 19:01:22,149 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 643 transitions. Word has length 23 [2021-08-12 19:01:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:22,149 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 643 transitions. [2021-08-12 19:01:22,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 643 transitions. [2021-08-12 19:01:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:01:22,150 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:22,150 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:22,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:01:22,351 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1734689328, now seen corresponding path program 37 times [2021-08-12 19:01:22,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:22,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520764897] [2021-08-12 19:01:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:01:22,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:22,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520764897] [2021-08-12 19:01:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520764897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724165019] [2021-08-12 19:01:22,400 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 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 [2021-08-12 19:01:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:22,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:01:22,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724165019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:22,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:22,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2021-08-12 19:01:22,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111873341] [2021-08-12 19:01:22,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:01:22,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:01:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:22,555 INFO L87 Difference]: Start difference. First operand 296 states and 643 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:22,848 INFO L93 Difference]: Finished difference Result 433 states and 905 transitions. [2021-08-12 19:01:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:01:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:01:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:22,849 INFO L225 Difference]: With dead ends: 433 [2021-08-12 19:01:22,850 INFO L226 Difference]: Without dead ends: 417 [2021-08-12 19:01:22,850 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:01:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-12 19:01:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 324. [2021-08-12 19:01:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2321981424148607) internal successors, (721), 323 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 721 transitions. [2021-08-12 19:01:22,877 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 721 transitions. Word has length 23 [2021-08-12 19:01:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:22,878 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 721 transitions. [2021-08-12 19:01:22,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 721 transitions. [2021-08-12 19:01:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:01:22,878 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:22,878 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:23,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-12 19:01:23,093 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1856120112, now seen corresponding path program 38 times [2021-08-12 19:01:23,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:23,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71258845] [2021-08-12 19:01:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:01:23,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:23,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71258845] [2021-08-12 19:01:23,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71258845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:23,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094796012] [2021-08-12 19:01:23,127 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 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 [2021-08-12 19:01:23,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:01:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:23,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094796012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:23,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:23,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2021-08-12 19:01:23,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513349877] [2021-08-12 19:01:23,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:01:23,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:01:23,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:23,352 INFO L87 Difference]: Start difference. First operand 324 states and 721 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-08-12 19:01:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:23,739 INFO L93 Difference]: Finished difference Result 497 states and 1052 transitions. [2021-08-12 19:01:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:01:23,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:01:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:23,742 INFO L225 Difference]: With dead ends: 497 [2021-08-12 19:01:23,742 INFO L226 Difference]: Without dead ends: 481 [2021-08-12 19:01:23,742 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:01:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-12 19:01:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 356. [2021-08-12 19:01:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.267605633802817) internal successors, (805), 355 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 805 transitions. [2021-08-12 19:01:23,772 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 805 transitions. Word has length 23 [2021-08-12 19:01:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:23,772 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 805 transitions. [2021-08-12 19:01:23,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-08-12 19:01:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 805 transitions. [2021-08-12 19:01:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:01:23,772 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:23,772 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:23,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:23,989 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1707980752, now seen corresponding path program 39 times [2021-08-12 19:01:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754437826] [2021-08-12 19:01:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:01:24,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:24,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754437826] [2021-08-12 19:01:24,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754437826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:24,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875062786] [2021-08-12 19:01:24,033 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 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 [2021-08-12 19:01:24,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:01:24,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:24,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:01:24,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:24,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875062786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:24,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:24,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-08-12 19:01:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038109892] [2021-08-12 19:01:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:01:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:24,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:01:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:01:24,156 INFO L87 Difference]: Start difference. First operand 356 states and 805 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:24,502 INFO L93 Difference]: Finished difference Result 484 states and 1049 transitions. [2021-08-12 19:01:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:01:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:01:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:24,505 INFO L225 Difference]: With dead ends: 484 [2021-08-12 19:01:24,505 INFO L226 Difference]: Without dead ends: 475 [2021-08-12 19:01:24,505 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:01:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-12 19:01:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2021-08-12 19:01:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2853598014888337) internal successors, (921), 403 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 921 transitions. [2021-08-12 19:01:24,541 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 921 transitions. Word has length 23 [2021-08-12 19:01:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:24,541 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 921 transitions. [2021-08-12 19:01:24,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 921 transitions. [2021-08-12 19:01:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:24,542 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:24,542 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:24,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:24,751 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash 942134834, now seen corresponding path program 40 times [2021-08-12 19:01:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:24,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508337168] [2021-08-12 19:01:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:24,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:24,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508337168] [2021-08-12 19:01:24,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508337168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:24,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486842659] [2021-08-12 19:01:24,818 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 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 [2021-08-12 19:01:24,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:24,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486842659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:24,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:24,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:01:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657598071] [2021-08-12 19:01:24,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:24,950 INFO L87 Difference]: Start difference. First operand 404 states and 921 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:26,865 INFO L93 Difference]: Finished difference Result 888 states and 1961 transitions. [2021-08-12 19:01:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:01:26,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:26,869 INFO L225 Difference]: With dead ends: 888 [2021-08-12 19:01:26,869 INFO L226 Difference]: Without dead ends: 869 [2021-08-12 19:01:26,873 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1128.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:01:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-08-12 19:01:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 330. [2021-08-12 19:01:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2674772036474162) internal successors, (746), 329 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 746 transitions. [2021-08-12 19:01:26,909 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 746 transitions. Word has length 25 [2021-08-12 19:01:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:26,909 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 746 transitions. [2021-08-12 19:01:26,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 746 transitions. [2021-08-12 19:01:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:26,909 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:26,909 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:27,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:27,111 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash -394924434, now seen corresponding path program 41 times [2021-08-12 19:01:27,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:27,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790546607] [2021-08-12 19:01:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:27,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:27,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790546607] [2021-08-12 19:01:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790546607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:27,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985223545] [2021-08-12 19:01:27,156 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 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 [2021-08-12 19:01:27,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:01:27,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:27,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985223545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:27,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:27,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:01:27,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588609517] [2021-08-12 19:01:27,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:27,268 INFO L87 Difference]: Start difference. First operand 330 states and 746 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:28,504 INFO L93 Difference]: Finished difference Result 781 states and 1509 transitions. [2021-08-12 19:01:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 19:01:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:28,507 INFO L225 Difference]: With dead ends: 781 [2021-08-12 19:01:28,507 INFO L226 Difference]: Without dead ends: 710 [2021-08-12 19:01:28,507 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:01:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-08-12 19:01:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 406. [2021-08-12 19:01:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.246913580246914) internal successors, (910), 405 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 910 transitions. [2021-08-12 19:01:28,560 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 910 transitions. Word has length 25 [2021-08-12 19:01:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:28,560 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 910 transitions. [2021-08-12 19:01:28,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 910 transitions. [2021-08-12 19:01:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:28,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:28,561 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:28,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 19:01:28,781 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777542, now seen corresponding path program 42 times [2021-08-12 19:01:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222497305] [2021-08-12 19:01:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:28,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222497305] [2021-08-12 19:01:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222497305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127149738] [2021-08-12 19:01:28,809 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 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 [2021-08-12 19:01:28,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:01:28,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:28,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127149738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:28,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:28,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-12 19:01:28,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311694374] [2021-08-12 19:01:28,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:28,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:28,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:28,909 INFO L87 Difference]: Start difference. First operand 406 states and 910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:29,831 INFO L93 Difference]: Finished difference Result 743 states and 1455 transitions. [2021-08-12 19:01:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:01:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:29,833 INFO L225 Difference]: With dead ends: 743 [2021-08-12 19:01:29,834 INFO L226 Difference]: Without dead ends: 728 [2021-08-12 19:01:29,834 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:01:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-08-12 19:01:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 402. [2021-08-12 19:01:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2369077306733165) internal successors, (897), 401 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 897 transitions. [2021-08-12 19:01:29,884 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 897 transitions. Word has length 25 [2021-08-12 19:01:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:29,884 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 897 transitions. [2021-08-12 19:01:29,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 897 transitions. [2021-08-12 19:01:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:29,885 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:29,885 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:30,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:30,086 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:30,086 INFO L82 PathProgramCache]: Analyzing trace with hash -85120540, now seen corresponding path program 43 times [2021-08-12 19:01:30,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:30,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806263662] [2021-08-12 19:01:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:30,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806263662] [2021-08-12 19:01:30,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806263662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684664839] [2021-08-12 19:01:30,129 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 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 [2021-08-12 19:01:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:30,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:30,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684664839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:30,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:30,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-12 19:01:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276978373] [2021-08-12 19:01:30,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:01:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:01:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:01:30,245 INFO L87 Difference]: Start difference. First operand 402 states and 897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:30,593 INFO L93 Difference]: Finished difference Result 450 states and 973 transitions. [2021-08-12 19:01:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:01:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:30,595 INFO L225 Difference]: With dead ends: 450 [2021-08-12 19:01:30,595 INFO L226 Difference]: Without dead ends: 435 [2021-08-12 19:01:30,596 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-12 19:01:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 402. [2021-08-12 19:01:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-08-12 19:01:30,646 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 25 [2021-08-12 19:01:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:30,646 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-08-12 19:01:30,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-08-12 19:01:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:30,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:30,647 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:30,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:30,861 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1036927438, now seen corresponding path program 44 times [2021-08-12 19:01:30,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:30,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417743154] [2021-08-12 19:01:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:30,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417743154] [2021-08-12 19:01:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417743154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842985771] [2021-08-12 19:01:30,893 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 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 [2021-08-12 19:01:30,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:30,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:31,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842985771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:31,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:31,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-12 19:01:31,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172453613] [2021-08-12 19:01:31,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:01:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:01:31,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:01:31,013 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-08-12 19:01:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:32,498 INFO L93 Difference]: Finished difference Result 1188 states and 2370 transitions. [2021-08-12 19:01:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 19:01:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:32,502 INFO L225 Difference]: With dead ends: 1188 [2021-08-12 19:01:32,502 INFO L226 Difference]: Without dead ends: 1175 [2021-08-12 19:01:32,503 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:01:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-08-12 19:01:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 477. [2021-08-12 19:01:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.2668067226890756) internal successors, (1079), 476 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1079 transitions. [2021-08-12 19:01:32,560 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1079 transitions. Word has length 25 [2021-08-12 19:01:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:32,561 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1079 transitions. [2021-08-12 19:01:32,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-08-12 19:01:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1079 transitions. [2021-08-12 19:01:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:32,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:32,561 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:32,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:01:32,777 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -334122130, now seen corresponding path program 45 times [2021-08-12 19:01:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:32,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088357316] [2021-08-12 19:01:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:32,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088357316] [2021-08-12 19:01:32,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088357316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350350683] [2021-08-12 19:01:32,804 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 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 [2021-08-12 19:01:32,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:01:32,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:32,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:32,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350350683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:32,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:32,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-12 19:01:32,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235466175] [2021-08-12 19:01:32,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:01:32,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:32,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:01:32,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:01:32,919 INFO L87 Difference]: Start difference. First operand 477 states and 1079 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:34,008 INFO L93 Difference]: Finished difference Result 837 states and 1672 transitions. [2021-08-12 19:01:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 19:01:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:34,011 INFO L225 Difference]: With dead ends: 837 [2021-08-12 19:01:34,011 INFO L226 Difference]: Without dead ends: 816 [2021-08-12 19:01:34,012 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:01:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-08-12 19:01:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 477. [2021-08-12 19:01:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.264705882352941) internal successors, (1078), 476 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1078 transitions. [2021-08-12 19:01:34,066 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1078 transitions. Word has length 25 [2021-08-12 19:01:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:34,066 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1078 transitions. [2021-08-12 19:01:34,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1078 transitions. [2021-08-12 19:01:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:34,067 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:34,067 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:34,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 19:01:34,274 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1599049990, now seen corresponding path program 46 times [2021-08-12 19:01:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:34,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348679439] [2021-08-12 19:01:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:34,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348679439] [2021-08-12 19:01:34,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348679439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762659636] [2021-08-12 19:01:34,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:34,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:34,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:34,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:34,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:34,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762659636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:34,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:34,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-12 19:01:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256175866] [2021-08-12 19:01:34,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:01:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:01:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:01:34,425 INFO L87 Difference]: Start difference. First operand 477 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:01:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:35,715 INFO L93 Difference]: Finished difference Result 1009 states and 2036 transitions. [2021-08-12 19:01:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:01:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:35,719 INFO L225 Difference]: With dead ends: 1009 [2021-08-12 19:01:35,719 INFO L226 Difference]: Without dead ends: 994 [2021-08-12 19:01:35,719 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 19:01:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-12 19:01:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 478. [2021-08-12 19:01:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.2641509433962264) internal successors, (1080), 477 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1080 transitions. [2021-08-12 19:01:35,775 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1080 transitions. Word has length 25 [2021-08-12 19:01:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:35,775 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1080 transitions. [2021-08-12 19:01:35,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:01:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1080 transitions. [2021-08-12 19:01:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:35,776 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:35,776 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:35,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:01:35,977 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1312019224, now seen corresponding path program 47 times [2021-08-12 19:01:35,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:35,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072426635] [2021-08-12 19:01:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:36,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072426635] [2021-08-12 19:01:36,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072426635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:36,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129286499] [2021-08-12 19:01:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:36,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:01:36,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:36,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:36,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129286499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:36,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:36,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-12 19:01:36,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395579362] [2021-08-12 19:01:36,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:01:36,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:01:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:01:36,122 INFO L87 Difference]: Start difference. First operand 478 states and 1080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:01:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:37,295 INFO L93 Difference]: Finished difference Result 904 states and 1795 transitions. [2021-08-12 19:01:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 19:01:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:37,299 INFO L225 Difference]: With dead ends: 904 [2021-08-12 19:01:37,299 INFO L226 Difference]: Without dead ends: 887 [2021-08-12 19:01:37,299 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:01:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-08-12 19:01:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 480. [2021-08-12 19:01:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.258872651356994) internal successors, (1082), 479 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1082 transitions. [2021-08-12 19:01:37,361 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1082 transitions. Word has length 25 [2021-08-12 19:01:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:37,361 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1082 transitions. [2021-08-12 19:01:37,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:01:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1082 transitions. [2021-08-12 19:01:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:37,362 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:37,362 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:37,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:37,573 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -504958402, now seen corresponding path program 48 times [2021-08-12 19:01:37,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:37,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568051316] [2021-08-12 19:01:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:37,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568051316] [2021-08-12 19:01:37,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568051316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990037544] [2021-08-12 19:01:37,607 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 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 [2021-08-12 19:01:37,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:01:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:37,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990037544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:37,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:37,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 19:01:37,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882800566] [2021-08-12 19:01:37,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:37,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:37,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:37,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:37,741 INFO L87 Difference]: Start difference. First operand 480 states and 1082 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:01:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:39,156 INFO L93 Difference]: Finished difference Result 924 states and 1855 transitions. [2021-08-12 19:01:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 19:01:39,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:39,159 INFO L225 Difference]: With dead ends: 924 [2021-08-12 19:01:39,159 INFO L226 Difference]: Without dead ends: 903 [2021-08-12 19:01:39,160 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 547.2ms TimeCoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:01:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-08-12 19:01:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 464. [2021-08-12 19:01:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.239740820734341) internal successors, (1037), 463 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1037 transitions. [2021-08-12 19:01:39,225 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1037 transitions. Word has length 25 [2021-08-12 19:01:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:39,225 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1037 transitions. [2021-08-12 19:01:39,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:01:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1037 transitions. [2021-08-12 19:01:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:39,226 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:39,226 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:39,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:39,426 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash 805672958, now seen corresponding path program 49 times [2021-08-12 19:01:39,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:39,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222502914] [2021-08-12 19:01:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:39,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:39,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222502914] [2021-08-12 19:01:39,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222502914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:39,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271351453] [2021-08-12 19:01:39,464 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 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 [2021-08-12 19:01:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:39,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271351453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:39,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:39,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 19:01:39,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878999914] [2021-08-12 19:01:39,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:39,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:39,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:39,577 INFO L87 Difference]: Start difference. First operand 464 states and 1037 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:01:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:40,735 INFO L93 Difference]: Finished difference Result 840 states and 1656 transitions. [2021-08-12 19:01:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:01:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:40,738 INFO L225 Difference]: With dead ends: 840 [2021-08-12 19:01:40,738 INFO L226 Difference]: Without dead ends: 821 [2021-08-12 19:01:40,738 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:01:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-12 19:01:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 468. [2021-08-12 19:01:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.233404710920771) internal successors, (1043), 467 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1043 transitions. [2021-08-12 19:01:40,799 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1043 transitions. Word has length 25 [2021-08-12 19:01:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:40,799 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1043 transitions. [2021-08-12 19:01:40,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:01:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1043 transitions. [2021-08-12 19:01:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:40,800 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:40,800 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:41,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 19:01:41,001 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -306061006, now seen corresponding path program 50 times [2021-08-12 19:01:41,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:41,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341378868] [2021-08-12 19:01:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:41,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:41,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341378868] [2021-08-12 19:01:41,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341378868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:41,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413689408] [2021-08-12 19:01:41,028 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 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 [2021-08-12 19:01:41,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:41,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413689408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:41,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:41,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-12 19:01:41,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424866387] [2021-08-12 19:01:41,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:41,159 INFO L87 Difference]: Start difference. First operand 468 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:42,675 INFO L93 Difference]: Finished difference Result 1189 states and 2388 transitions. [2021-08-12 19:01:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 19:01:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:42,678 INFO L225 Difference]: With dead ends: 1189 [2021-08-12 19:01:42,678 INFO L226 Difference]: Without dead ends: 1176 [2021-08-12 19:01:42,679 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:01:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-08-12 19:01:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 469. [2021-08-12 19:01:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.232905982905983) internal successors, (1045), 468 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1045 transitions. [2021-08-12 19:01:42,749 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1045 transitions. Word has length 25 [2021-08-12 19:01:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:42,750 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1045 transitions. [2021-08-12 19:01:42,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1045 transitions. [2021-08-12 19:01:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:42,750 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:42,750 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:42,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:42,951 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 396744302, now seen corresponding path program 51 times [2021-08-12 19:01:42,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:42,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567007958] [2021-08-12 19:01:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:42,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567007958] [2021-08-12 19:01:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567007958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134328926] [2021-08-12 19:01:42,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:43,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:01:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:43,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:43,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134328926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:43,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:43,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-12 19:01:43,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116513641] [2021-08-12 19:01:43,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:43,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:43,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:43,126 INFO L87 Difference]: Start difference. First operand 469 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-12 19:01:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:44,386 INFO L93 Difference]: Finished difference Result 844 states and 1672 transitions. [2021-08-12 19:01:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:01:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:44,389 INFO L225 Difference]: With dead ends: 844 [2021-08-12 19:01:44,389 INFO L226 Difference]: Without dead ends: 817 [2021-08-12 19:01:44,389 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:01:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-12 19:01:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 469. [2021-08-12 19:01:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.230769230769231) internal successors, (1044), 468 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1044 transitions. [2021-08-12 19:01:44,449 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1044 transitions. Word has length 25 [2021-08-12 19:01:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:44,449 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1044 transitions. [2021-08-12 19:01:44,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-12 19:01:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1044 transitions. [2021-08-12 19:01:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:44,450 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:44,450 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:44,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 19:01:44,650 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash -868183558, now seen corresponding path program 52 times [2021-08-12 19:01:44,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:44,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647529790] [2021-08-12 19:01:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:44,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647529790] [2021-08-12 19:01:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647529790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188176259] [2021-08-12 19:01:44,677 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 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 [2021-08-12 19:01:44,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:44,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:44,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188176259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:44,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:44,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-12 19:01:44,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902568641] [2021-08-12 19:01:44,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:44,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:44,824 INFO L87 Difference]: Start difference. First operand 469 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:46,708 INFO L93 Difference]: Finished difference Result 1087 states and 2157 transitions. [2021-08-12 19:01:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:01:46,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:46,710 INFO L225 Difference]: With dead ends: 1087 [2021-08-12 19:01:46,710 INFO L226 Difference]: Without dead ends: 1066 [2021-08-12 19:01:46,710 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:01:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-12 19:01:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 470. [2021-08-12 19:01:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.230277185501066) internal successors, (1046), 469 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1046 transitions. [2021-08-12 19:01:46,774 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1046 transitions. Word has length 25 [2021-08-12 19:01:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:46,774 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1046 transitions. [2021-08-12 19:01:46,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1046 transitions. [2021-08-12 19:01:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:46,775 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:46,775 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:46,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:01:46,975 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:46,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:46,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2042885656, now seen corresponding path program 53 times [2021-08-12 19:01:46,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:46,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018884839] [2021-08-12 19:01:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:47,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018884839] [2021-08-12 19:01:47,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018884839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361434048] [2021-08-12 19:01:47,010 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 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 [2021-08-12 19:01:47,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:01:47,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:47,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361434048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:47,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:47,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-12 19:01:47,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082521189] [2021-08-12 19:01:47,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:47,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:47,146 INFO L87 Difference]: Start difference. First operand 470 states and 1046 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:48,349 INFO L93 Difference]: Finished difference Result 925 states and 1849 transitions. [2021-08-12 19:01:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:01:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:48,351 INFO L225 Difference]: With dead ends: 925 [2021-08-12 19:01:48,351 INFO L226 Difference]: Without dead ends: 908 [2021-08-12 19:01:48,352 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:01:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-08-12 19:01:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 470. [2021-08-12 19:01:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.228144989339019) internal successors, (1045), 469 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1045 transitions. [2021-08-12 19:01:48,412 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1045 transitions. Word has length 25 [2021-08-12 19:01:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:48,412 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1045 transitions. [2021-08-12 19:01:48,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1045 transitions. [2021-08-12 19:01:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:48,413 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:48,413 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:48,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:01:48,614 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 225908030, now seen corresponding path program 54 times [2021-08-12 19:01:48,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:48,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953169177] [2021-08-12 19:01:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:48,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:48,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953169177] [2021-08-12 19:01:48,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953169177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:48,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361145551] [2021-08-12 19:01:48,646 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 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 [2021-08-12 19:01:48,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:01:48,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:48,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:48,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361145551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:48,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:48,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-12 19:01:48,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435513173] [2021-08-12 19:01:48,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:01:48,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:01:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:01:48,785 INFO L87 Difference]: Start difference. First operand 470 states and 1045 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:51,489 INFO L93 Difference]: Finished difference Result 1369 states and 2781 transitions. [2021-08-12 19:01:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-12 19:01:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:51,492 INFO L225 Difference]: With dead ends: 1369 [2021-08-12 19:01:51,492 INFO L226 Difference]: Without dead ends: 1348 [2021-08-12 19:01:51,493 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 1031.8ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-08-12 19:01:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-08-12 19:01:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 472. [2021-08-12 19:01:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2271762208067942) internal successors, (1049), 471 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1049 transitions. [2021-08-12 19:01:51,557 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1049 transitions. Word has length 25 [2021-08-12 19:01:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:51,558 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1049 transitions. [2021-08-12 19:01:51,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1049 transitions. [2021-08-12 19:01:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:51,558 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:51,558 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:51,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:01:51,759 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:51,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1536539390, now seen corresponding path program 55 times [2021-08-12 19:01:51,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:51,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514942226] [2021-08-12 19:01:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:01:51,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:51,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514942226] [2021-08-12 19:01:51,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514942226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:51,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032420039] [2021-08-12 19:01:51,793 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 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 [2021-08-12 19:01:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:51,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:51,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032420039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:51,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:51,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-12 19:01:51,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858136487] [2021-08-12 19:01:51,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:01:51,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:01:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:01:51,921 INFO L87 Difference]: Start difference. First operand 472 states and 1049 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:53,292 INFO L93 Difference]: Finished difference Result 874 states and 1728 transitions. [2021-08-12 19:01:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 19:01:53,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:53,294 INFO L225 Difference]: With dead ends: 874 [2021-08-12 19:01:53,294 INFO L226 Difference]: Without dead ends: 841 [2021-08-12 19:01:53,294 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:01:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-12 19:01:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 472. [2021-08-12 19:01:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2229299363057327) internal successors, (1047), 471 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1047 transitions. [2021-08-12 19:01:53,359 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1047 transitions. Word has length 25 [2021-08-12 19:01:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:53,359 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1047 transitions. [2021-08-12 19:01:53,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1047 transitions. [2021-08-12 19:01:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:53,360 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:53,360 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:53,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:53,561 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1504861702, now seen corresponding path program 56 times [2021-08-12 19:01:53,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:53,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001676922] [2021-08-12 19:01:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:53,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:53,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001676922] [2021-08-12 19:01:53,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001676922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:53,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358661656] [2021-08-12 19:01:53,604 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:01:53,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:53,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358661656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:53,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:53,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-12 19:01:53,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751053888] [2021-08-12 19:01:53,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:01:53,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:53,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:01:53,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:53,748 INFO L87 Difference]: Start difference. First operand 472 states and 1047 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:56,366 INFO L93 Difference]: Finished difference Result 1011 states and 2070 transitions. [2021-08-12 19:01:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:01:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:56,368 INFO L225 Difference]: With dead ends: 1011 [2021-08-12 19:01:56,368 INFO L226 Difference]: Without dead ends: 982 [2021-08-12 19:01:56,369 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1110.9ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-08-12 19:01:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-08-12 19:01:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 436. [2021-08-12 19:01:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.197701149425287) internal successors, (956), 435 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 956 transitions. [2021-08-12 19:01:56,437 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 956 transitions. Word has length 25 [2021-08-12 19:01:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:56,437 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 956 transitions. [2021-08-12 19:01:56,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 956 transitions. [2021-08-12 19:01:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:56,438 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:56,438 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:56,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:01:56,639 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1309318010, now seen corresponding path program 57 times [2021-08-12 19:01:56,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:56,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101777547] [2021-08-12 19:01:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:56,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101777547] [2021-08-12 19:01:56,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101777547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:56,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515622202] [2021-08-12 19:01:56,681 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 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 [2021-08-12 19:01:56,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:01:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:56,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515622202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:56,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:56,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-12 19:01:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311675908] [2021-08-12 19:01:56,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:01:56,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:01:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:56,818 INFO L87 Difference]: Start difference. First operand 436 states and 956 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:57,941 INFO L93 Difference]: Finished difference Result 708 states and 1397 transitions. [2021-08-12 19:01:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:01:57,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:01:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:57,944 INFO L225 Difference]: With dead ends: 708 [2021-08-12 19:01:57,944 INFO L226 Difference]: Without dead ends: 685 [2021-08-12 19:01:57,944 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:01:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-12 19:01:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 436. [2021-08-12 19:01:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.193103448275862) internal successors, (954), 435 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 954 transitions. [2021-08-12 19:01:58,012 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 954 transitions. Word has length 25 [2021-08-12 19:01:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:58,012 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 954 transitions. [2021-08-12 19:01:58,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 954 transitions. [2021-08-12 19:01:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:58,013 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:58,013 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:58,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:01:58,213 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1091186638, now seen corresponding path program 58 times [2021-08-12 19:01:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:58,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708577384] [2021-08-12 19:01:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:58,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708577384] [2021-08-12 19:01:58,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708577384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710508188] [2021-08-12 19:01:58,275 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 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 [2021-08-12 19:01:58,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:01:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:01:58,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:58,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710508188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:58,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:58,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-12 19:01:58,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5302352] [2021-08-12 19:01:58,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:01:58,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:01:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:58,447 INFO L87 Difference]: Start difference. First operand 436 states and 954 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:00,788 INFO L93 Difference]: Finished difference Result 1056 states and 2194 transitions. [2021-08-12 19:02:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-12 19:02:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:00,791 INFO L225 Difference]: With dead ends: 1056 [2021-08-12 19:02:00,791 INFO L226 Difference]: Without dead ends: 1039 [2021-08-12 19:02:00,791 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1093.2ms TimeCoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:02:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-08-12 19:02:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 402. [2021-08-12 19:02:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.1596009975062342) internal successors, (866), 401 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 866 transitions. [2021-08-12 19:02:00,858 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 866 transitions. Word has length 25 [2021-08-12 19:02:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:00,858 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 866 transitions. [2021-08-12 19:02:00,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 866 transitions. [2021-08-12 19:02:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:00,859 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:00,859 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:01,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 19:02:01,060 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1088108690, now seen corresponding path program 59 times [2021-08-12 19:02:01,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:01,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494135193] [2021-08-12 19:02:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:01,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494135193] [2021-08-12 19:02:01,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494135193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485725410] [2021-08-12 19:02:01,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:02:01,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:02:01,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:01,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485725410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:01,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:01,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-12 19:02:01,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199764375] [2021-08-12 19:02:01,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:02:01,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:01,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:02:01,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:02:01,243 INFO L87 Difference]: Start difference. First operand 402 states and 866 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:02,308 INFO L93 Difference]: Finished difference Result 563 states and 1100 transitions. [2021-08-12 19:02:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:02:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:02,309 INFO L225 Difference]: With dead ends: 563 [2021-08-12 19:02:02,309 INFO L226 Difference]: Without dead ends: 518 [2021-08-12 19:02:02,313 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:02:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-12 19:02:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 381. [2021-08-12 19:02:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.168421052631579) internal successors, (824), 380 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 824 transitions. [2021-08-12 19:02:02,372 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 824 transitions. Word has length 25 [2021-08-12 19:02:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:02,372 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 824 transitions. [2021-08-12 19:02:02,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 824 transitions. [2021-08-12 19:02:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:02,373 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:02,373 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:02,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:02,586 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:02,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1258665422, now seen corresponding path program 60 times [2021-08-12 19:02:02,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:02,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8295367] [2021-08-12 19:02:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:02,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:02,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8295367] [2021-08-12 19:02:02,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8295367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:02,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962506105] [2021-08-12 19:02:02,620 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:02:02,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:02:02,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:02,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962506105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:02,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:02,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 19:02:02,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472152563] [2021-08-12 19:02:02,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:02:02,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:02,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:02:02,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:02,742 INFO L87 Difference]: Start difference. First operand 381 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:04,160 INFO L93 Difference]: Finished difference Result 762 states and 1516 transitions. [2021-08-12 19:02:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:02:04,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:04,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:04,161 INFO L225 Difference]: With dead ends: 762 [2021-08-12 19:02:04,162 INFO L226 Difference]: Without dead ends: 749 [2021-08-12 19:02:04,162 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 19:02:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-08-12 19:02:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 375. [2021-08-12 19:02:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.1550802139037435) internal successors, (806), 374 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 806 transitions. [2021-08-12 19:02:04,229 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 806 transitions. Word has length 25 [2021-08-12 19:02:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:04,229 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 806 transitions. [2021-08-12 19:02:04,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 806 transitions. [2021-08-12 19:02:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:04,230 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:04,230 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:04,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-12 19:02:04,430 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:04,431 INFO L82 PathProgramCache]: Analyzing trace with hash -172629906, now seen corresponding path program 61 times [2021-08-12 19:02:04,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:04,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572822456] [2021-08-12 19:02:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:04,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572822456] [2021-08-12 19:02:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572822456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995642948] [2021-08-12 19:02:04,466 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 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 [2021-08-12 19:02:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:04,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:04,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995642948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:04,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:04,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 19:02:04,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983852157] [2021-08-12 19:02:04,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:02:04,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:02:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:04,624 INFO L87 Difference]: Start difference. First operand 375 states and 806 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:02:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:05,808 INFO L93 Difference]: Finished difference Result 582 states and 1113 transitions. [2021-08-12 19:02:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:02:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:05,811 INFO L225 Difference]: With dead ends: 582 [2021-08-12 19:02:05,811 INFO L226 Difference]: Without dead ends: 558 [2021-08-12 19:02:05,811 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:02:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-08-12 19:02:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2021-08-12 19:02:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2021-08-12 19:02:05,870 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 25 [2021-08-12 19:02:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:05,870 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2021-08-12 19:02:05,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:02:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2021-08-12 19:02:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:05,871 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:05,871 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:06,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:06,072 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1976910898, now seen corresponding path program 62 times [2021-08-12 19:02:06,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:06,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982725990] [2021-08-12 19:02:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:06,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:06,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982725990] [2021-08-12 19:02:06,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982725990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:06,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642491348] [2021-08-12 19:02:06,101 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 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 [2021-08-12 19:02:06,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:02:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:06,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642491348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:06,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:06,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-12 19:02:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269363091] [2021-08-12 19:02:06,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:06,240 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-08-12 19:02:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:07,430 INFO L93 Difference]: Finished difference Result 693 states and 1334 transitions. [2021-08-12 19:02:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:02:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:07,432 INFO L225 Difference]: With dead ends: 693 [2021-08-12 19:02:07,432 INFO L226 Difference]: Without dead ends: 680 [2021-08-12 19:02:07,432 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:02:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-12 19:02:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 360. [2021-08-12 19:02:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1587743732590527) internal successors, (775), 359 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 775 transitions. [2021-08-12 19:02:07,490 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 775 transitions. Word has length 25 [2021-08-12 19:02:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:07,490 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 775 transitions. [2021-08-12 19:02:07,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-08-12 19:02:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 775 transitions. [2021-08-12 19:02:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:07,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:07,490 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:07,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 19:02:07,691 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:07,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1615251090, now seen corresponding path program 63 times [2021-08-12 19:02:07,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:07,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849133276] [2021-08-12 19:02:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:07,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:07,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849133276] [2021-08-12 19:02:07,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849133276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:07,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835782301] [2021-08-12 19:02:07,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:02:07,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:02:07,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:07,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:07,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835782301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:07,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:07,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-12 19:02:07,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160239082] [2021-08-12 19:02:07,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:07,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:07,824 INFO L87 Difference]: Start difference. First operand 360 states and 775 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:08,481 INFO L93 Difference]: Finished difference Result 456 states and 911 transitions. [2021-08-12 19:02:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:02:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:08,482 INFO L225 Difference]: With dead ends: 456 [2021-08-12 19:02:08,482 INFO L226 Difference]: Without dead ends: 438 [2021-08-12 19:02:08,482 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:02:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-12 19:02:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 357. [2021-08-12 19:02:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1601123595505616) internal successors, (769), 356 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 769 transitions. [2021-08-12 19:02:08,539 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 769 transitions. Word has length 25 [2021-08-12 19:02:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:08,539 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 769 transitions. [2021-08-12 19:02:08,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 769 transitions. [2021-08-12 19:02:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:08,539 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:08,539 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:08,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:08,740 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:08,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1414788346, now seen corresponding path program 64 times [2021-08-12 19:02:08,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:08,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615770612] [2021-08-12 19:02:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:08,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:08,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615770612] [2021-08-12 19:02:08,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615770612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:08,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600401944] [2021-08-12 19:02:08,779 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 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 [2021-08-12 19:02:08,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:02:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:08,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600401944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:08,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:08,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-12 19:02:08,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434333869] [2021-08-12 19:02:08,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:08,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:08,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:08,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:08,877 INFO L87 Difference]: Start difference. First operand 357 states and 769 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-08-12 19:02:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:09,883 INFO L93 Difference]: Finished difference Result 513 states and 1029 transitions. [2021-08-12 19:02:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:02:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:09,885 INFO L225 Difference]: With dead ends: 513 [2021-08-12 19:02:09,885 INFO L226 Difference]: Without dead ends: 498 [2021-08-12 19:02:09,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:02:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-12 19:02:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 358. [2021-08-12 19:02:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.1596638655462184) internal successors, (771), 357 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 771 transitions. [2021-08-12 19:02:09,945 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 771 transitions. Word has length 25 [2021-08-12 19:02:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:09,946 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 771 transitions. [2021-08-12 19:02:09,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-08-12 19:02:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 771 transitions. [2021-08-12 19:02:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:09,946 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:09,946 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:10,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 19:02:10,162 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash 30890264, now seen corresponding path program 65 times [2021-08-12 19:02:10,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:10,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56901740] [2021-08-12 19:02:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:10,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56901740] [2021-08-12 19:02:10,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56901740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93385464] [2021-08-12 19:02:10,189 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 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 [2021-08-12 19:02:10,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:02:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93385464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:10,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:10,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-08-12 19:02:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553267319] [2021-08-12 19:02:10,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:02:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:02:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:02:10,300 INFO L87 Difference]: Start difference. First operand 358 states and 771 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-08-12 19:02:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:11,362 INFO L93 Difference]: Finished difference Result 646 states and 1235 transitions. [2021-08-12 19:02:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:02:11,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:11,364 INFO L225 Difference]: With dead ends: 646 [2021-08-12 19:02:11,364 INFO L226 Difference]: Without dead ends: 631 [2021-08-12 19:02:11,364 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:02:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-12 19:02:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 358. [2021-08-12 19:02:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.156862745098039) internal successors, (770), 357 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 770 transitions. [2021-08-12 19:02:11,425 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 770 transitions. Word has length 25 [2021-08-12 19:02:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:11,425 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 770 transitions. [2021-08-12 19:02:11,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2021-08-12 19:02:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 770 transitions. [2021-08-12 19:02:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:11,426 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:11,426 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:11,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 19:02:11,633 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1786087362, now seen corresponding path program 66 times [2021-08-12 19:02:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:11,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435380961] [2021-08-12 19:02:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:11,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435380961] [2021-08-12 19:02:11,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435380961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521542250] [2021-08-12 19:02:11,660 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 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 [2021-08-12 19:02:11,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:02:11,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:11,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521542250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:11,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:11,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-12 19:02:11,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176944980] [2021-08-12 19:02:11,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:02:11,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:11,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:02:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:02:11,793 INFO L87 Difference]: Start difference. First operand 358 states and 770 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:02:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:13,817 INFO L93 Difference]: Finished difference Result 756 states and 1544 transitions. [2021-08-12 19:02:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-12 19:02:13,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:13,819 INFO L225 Difference]: With dead ends: 756 [2021-08-12 19:02:13,819 INFO L226 Difference]: Without dead ends: 741 [2021-08-12 19:02:13,820 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=1079, Invalid=5241, Unknown=0, NotChecked=0, Total=6320 [2021-08-12 19:02:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-12 19:02:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 362. [2021-08-12 19:02:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-08-12 19:02:13,882 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 25 [2021-08-12 19:02:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:13,882 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-08-12 19:02:13,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:02:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-08-12 19:02:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:13,883 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:13,883 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:14,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 19:02:14,083 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash -475456002, now seen corresponding path program 67 times [2021-08-12 19:02:14,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:14,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638749645] [2021-08-12 19:02:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:14,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:14,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638749645] [2021-08-12 19:02:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638749645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:14,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13912776] [2021-08-12 19:02:14,118 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 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 [2021-08-12 19:02:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:14,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:14,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13912776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:14,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:14,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-12 19:02:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511661326] [2021-08-12 19:02:14,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:02:14,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:02:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:02:14,229 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:02:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:15,673 INFO L93 Difference]: Finished difference Result 740 states and 1386 transitions. [2021-08-12 19:02:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 19:02:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:15,675 INFO L225 Difference]: With dead ends: 740 [2021-08-12 19:02:15,675 INFO L226 Difference]: Without dead ends: 707 [2021-08-12 19:02:15,675 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:02:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-12 19:02:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 362. [2021-08-12 19:02:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.14404432132964) internal successors, (774), 361 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 774 transitions. [2021-08-12 19:02:15,734 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 774 transitions. Word has length 25 [2021-08-12 19:02:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:15,734 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 774 transitions. [2021-08-12 19:02:15,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-08-12 19:02:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 774 transitions. [2021-08-12 19:02:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:15,734 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:15,734 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:15,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:15,935 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 778110202, now seen corresponding path program 68 times [2021-08-12 19:02:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:15,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260423497] [2021-08-12 19:02:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:15,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260423497] [2021-08-12 19:02:15,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260423497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318892796] [2021-08-12 19:02:15,973 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 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 [2021-08-12 19:02:15,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:02:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:16,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318892796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:16,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:16,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 19:02:16,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328612438] [2021-08-12 19:02:16,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:02:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:02:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:16,083 INFO L87 Difference]: Start difference. First operand 362 states and 774 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:02:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:18,844 INFO L93 Difference]: Finished difference Result 871 states and 1829 transitions. [2021-08-12 19:02:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-12 19:02:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:18,847 INFO L225 Difference]: With dead ends: 871 [2021-08-12 19:02:18,847 INFO L226 Difference]: Without dead ends: 852 [2021-08-12 19:02:18,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 1445.0ms TimeCoverageRelationStatistics Valid=1807, Invalid=7895, Unknown=0, NotChecked=0, Total=9702 [2021-08-12 19:02:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-12 19:02:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 366. [2021-08-12 19:02:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.1424657534246574) internal successors, (782), 365 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 782 transitions. [2021-08-12 19:02:18,917 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 782 transitions. Word has length 25 [2021-08-12 19:02:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:18,917 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 782 transitions. [2021-08-12 19:02:18,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:02:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 782 transitions. [2021-08-12 19:02:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:18,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:18,917 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:19,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:19,134 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:19,134 INFO L82 PathProgramCache]: Analyzing trace with hash -702677382, now seen corresponding path program 69 times [2021-08-12 19:02:19,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:19,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203488113] [2021-08-12 19:02:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:02:19,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:19,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203488113] [2021-08-12 19:02:19,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203488113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:19,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107985213] [2021-08-12 19:02:19,165 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 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 [2021-08-12 19:02:19,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:02:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:19,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107985213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:19,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:19,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-12 19:02:19,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259706507] [2021-08-12 19:02:19,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:02:19,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:02:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:19,284 INFO L87 Difference]: Start difference. First operand 366 states and 782 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:02:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:20,779 INFO L93 Difference]: Finished difference Result 731 states and 1366 transitions. [2021-08-12 19:02:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:02:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:20,784 INFO L225 Difference]: With dead ends: 731 [2021-08-12 19:02:20,784 INFO L226 Difference]: Without dead ends: 688 [2021-08-12 19:02:20,785 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=555, Invalid=2751, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 19:02:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-12 19:02:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2021-08-12 19:02:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.128065395095368) internal successors, (781), 367 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 781 transitions. [2021-08-12 19:02:20,849 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 781 transitions. Word has length 25 [2021-08-12 19:02:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:20,849 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 781 transitions. [2021-08-12 19:02:20,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-08-12 19:02:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 781 transitions. [2021-08-12 19:02:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:20,850 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:20,850 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:21,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:21,063 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -339258698, now seen corresponding path program 70 times [2021-08-12 19:02:21,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:21,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067702645] [2021-08-12 19:02:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:21,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067702645] [2021-08-12 19:02:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067702645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309117562] [2021-08-12 19:02:21,104 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 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 [2021-08-12 19:02:21,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:02:21,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:21,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:21,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309117562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:21,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:21,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:02:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031969950] [2021-08-12 19:02:21,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:02:21,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:02:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:21,213 INFO L87 Difference]: Start difference. First operand 368 states and 781 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:23,474 INFO L93 Difference]: Finished difference Result 738 states and 1550 transitions. [2021-08-12 19:02:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-12 19:02:23,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:23,476 INFO L225 Difference]: With dead ends: 738 [2021-08-12 19:02:23,476 INFO L226 Difference]: Without dead ends: 704 [2021-08-12 19:02:23,476 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1106.4ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:02:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-12 19:02:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 355. [2021-08-12 19:02:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.132768361581921) internal successors, (755), 354 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 755 transitions. [2021-08-12 19:02:23,537 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 755 transitions. Word has length 25 [2021-08-12 19:02:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:23,537 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 755 transitions. [2021-08-12 19:02:23,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 755 transitions. [2021-08-12 19:02:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:23,538 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:23,538 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-12 19:02:23,741 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash -19091466, now seen corresponding path program 71 times [2021-08-12 19:02:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763256304] [2021-08-12 19:02:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:23,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763256304] [2021-08-12 19:02:23,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763256304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545748598] [2021-08-12 19:02:23,781 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 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 [2021-08-12 19:02:23,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:02:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:02:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:23,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545748598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:23,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:23,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:02:23,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999871146] [2021-08-12 19:02:23,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:02:23,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:02:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:02:23,896 INFO L87 Difference]: Start difference. First operand 355 states and 755 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:24,906 INFO L93 Difference]: Finished difference Result 545 states and 1050 transitions. [2021-08-12 19:02:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:02:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:02:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:24,907 INFO L225 Difference]: With dead ends: 545 [2021-08-12 19:02:24,907 INFO L226 Difference]: Without dead ends: 518 [2021-08-12 19:02:24,907 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:02:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-12 19:02:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 355. [2021-08-12 19:02:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.121468926553672) internal successors, (751), 354 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 751 transitions. [2021-08-12 19:02:24,969 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 751 transitions. Word has length 25 [2021-08-12 19:02:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:24,969 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 751 transitions. [2021-08-12 19:02:24,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 751 transitions. [2021-08-12 19:02:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:02:24,970 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:24,970 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:25,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:25,171 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1769779472, now seen corresponding path program 72 times [2021-08-12 19:02:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:25,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619917119] [2021-08-12 19:02:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:25,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:25,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619917119] [2021-08-12 19:02:25,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619917119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:25,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716535548] [2021-08-12 19:02:25,205 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 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 [2021-08-12 19:02:25,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:02:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:02:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-12 19:10:27,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:10:27,550 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:10:27,552 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:10:27,554 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:10:27,554 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:10:27 BasicIcfg [2021-08-12 19:10:27,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:10:27,555 INFO L168 Benchmark]: Toolchain (without parser) took 570438.06 ms. Allocated memory was 192.9 MB in the beginning and 1.2 GB in the end (delta: 973.1 MB). Free memory was 173.9 MB in the beginning and 896.5 MB in the end (delta: -722.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-12 19:10:27,555 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 192.9 MB. Free memory is still 175.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:10:27,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.77 ms. Allocated memory is still 192.9 MB. Free memory was 173.9 MB in the beginning and 172.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:10:27,555 INFO L168 Benchmark]: Boogie Preprocessor took 13.05 ms. Allocated memory is still 192.9 MB. Free memory was 172.5 MB in the beginning and 171.6 MB in the end (delta: 855.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:10:27,555 INFO L168 Benchmark]: RCFGBuilder took 203.00 ms. Allocated memory is still 192.9 MB. Free memory was 171.5 MB in the beginning and 161.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-12 19:10:27,556 INFO L168 Benchmark]: TraceAbstraction took 570193.64 ms. Allocated memory was 192.9 MB in the beginning and 1.2 GB in the end (delta: 973.1 MB). Free memory was 161.5 MB in the beginning and 896.5 MB in the end (delta: -735.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-12 19:10:27,556 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 0.11 ms. Allocated memory is still 192.9 MB. Free memory is still 175.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.77 ms. Allocated memory is still 192.9 MB. Free memory was 173.9 MB in the beginning and 172.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.05 ms. Allocated memory is still 192.9 MB. Free memory was 172.5 MB in the beginning and 171.6 MB in the end (delta: 855.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 203.00 ms. Allocated memory is still 192.9 MB. Free memory was 171.5 MB in the beginning and 161.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 570193.64 ms. Allocated memory was 192.9 MB in the beginning and 1.2 GB in the end (delta: 973.1 MB). Free memory was 161.5 MB in the beginning and 896.5 MB in the end (delta: -735.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 377 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 570122.1ms, OverallIterations: 76, TraceHistogramMax: 4, EmptinessCheckTime: 52.2ms, AutomataDifference: 59315.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2402 SDtfs, 8215 SDslu, 14012 SDs, 0 SdLazy, 26354 SolverSat, 1661 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12316.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3731 GetRequests, 1218 SyntacticMatches, 152 SemanticMatches, 2361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32165 ImplicationChecksByTransitivity, 23583.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=51, InterpolantAutomatonStates: 2266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2541.4ms AutomataMinimizationTime, 75 MinimizatonAttempts, 16752 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 145.7ms SsaConstructionTime, 517.2ms SatisfiabilityAnalysisTime, 8617.9ms InterpolantComputationTime, 3186 NumberOfCodeBlocks, 3186 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 3040 ConstructedInterpolants, 0 QuantifiedInterpolants, 16506 SizeOfPredicates, 203 NumberOfNonLiveVariables, 2812 ConjunctsInSsa, 581 ConjunctsInUnsatCore, 146 InterpolantComputations, 4 PerfectInterpolantSequences, 648/2422 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