/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:21:09,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:21:09,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:21:09,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:21:09,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:21:09,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:21:09,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:21:09,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:21:09,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:21:09,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:21:09,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:21:09,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:21:09,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:21:09,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:21:09,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:21:09,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:21:09,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:21:09,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:21:09,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:21:09,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:21:09,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:21:09,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:21:09,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:21:09,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:21:09,540 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:21:09,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:21:09,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:21:09,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:21:09,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:21:09,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:21:09,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:21:09,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:21:09,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:21:09,543 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:21:09,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:21:09,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:21:09,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:21:09,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:21:09,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:21:09,797 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:21:09,798 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:21:09,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-07-13 20:21:09,798 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-07-13 20:21:09,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:21:09,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:21:09,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:21:09,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:21:09,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:21:09,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:21:09,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:21:09,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:21:09,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:21:09,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... [2021-07-13 20:21:09,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:21:09,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:21:09,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:21:09,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:21:09,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:21:09,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:21:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:21:09,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:21:09,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:21:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:21:09,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:21:09,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:21:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:21:09,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:21:09,922 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:21:10,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:21:10,094 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:21:10,095 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:21:10 BoogieIcfgContainer [2021-07-13 20:21:10,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:21:10,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:21:10,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:21:10,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:21:10,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:09" (1/2) ... [2021-07-13 20:21:10,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70aaa74f and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:21:10, skipping insertion in model container [2021-07-13 20:21:10,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:21:10" (2/2) ... [2021-07-13 20:21:10,100 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-07-13 20:21:10,103 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:21:10,104 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:21:10,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:21:10,104 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:21:10,161 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:21:10,176 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:21:10,189 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:21:10,189 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:21:10,189 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:21:10,189 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:21:10,189 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:21:10,190 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:21:10,190 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:21:10,190 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:21:10,196 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-07-13 20:21:10,205 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:21:10,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:10,212 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:10,212 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash -281375544, now seen corresponding path program 1 times [2021-07-13 20:21:10,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:10,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97987494] [2021-07-13 20:21:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97987494] [2021-07-13 20:21:10,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97987494] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:10,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:10,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:21:10,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222083302] [2021-07-13 20:21:10,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:21:10,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:21:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:21:10,332 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 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 5.0) 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) [2021-07-13 20:21:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:10,370 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-07-13 20:21:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:21:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) 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 [2021-07-13 20:21:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:10,376 INFO L225 Difference]: With dead ends: 38 [2021-07-13 20:21:10,376 INFO L226 Difference]: Without dead ends: 38 [2021-07-13 20:21:10,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:21:10,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-07-13 20:21:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-07-13 20:21:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-07-13 20:21:10,398 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-07-13 20:21:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:10,398 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-07-13 20:21:10,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) 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) [2021-07-13 20:21:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-07-13 20:21:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:21:10,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:10,399 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:10,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:21:10,399 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1344639720, now seen corresponding path program 1 times [2021-07-13 20:21:10,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:10,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023058790] [2021-07-13 20:21:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:10,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023058790] [2021-07-13 20:21:10,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023058790] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:10,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:10,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:21:10,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814824899] [2021-07-13 20:21:10,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:21:10,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:10,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:21:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:21:10,435 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-07-13 20:21:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:10,456 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-07-13 20:21:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:21:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2021-07-13 20:21:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:10,459 INFO L225 Difference]: With dead ends: 62 [2021-07-13 20:21:10,459 INFO L226 Difference]: Without dead ends: 62 [2021-07-13 20:21:10,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:21:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-13 20:21:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-07-13 20:21:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-07-13 20:21:10,466 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-07-13 20:21:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:10,466 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-07-13 20:21:10,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-07-13 20:21:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-07-13 20:21:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:21:10,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:10,467 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:10,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:21:10,467 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash 405244970, now seen corresponding path program 1 times [2021-07-13 20:21:10,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:10,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038101577] [2021-07-13 20:21:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:21:10,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038101577] [2021-07-13 20:21:10,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038101577] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:10,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:10,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:21:10,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037674958] [2021-07-13 20:21:10,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:21:10,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:21:10,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:21:10,506 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) 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) [2021-07-13 20:21:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:10,520 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-07-13 20:21:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:21:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) 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 20 [2021-07-13 20:21:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:10,522 INFO L225 Difference]: With dead ends: 87 [2021-07-13 20:21:10,522 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 20:21:10,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:21:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 20:21:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-07-13 20:21:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-07-13 20:21:10,529 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-07-13 20:21:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:10,529 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-07-13 20:21:10,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) 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) [2021-07-13 20:21:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-07-13 20:21:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:10,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:10,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:10,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:21:10,530 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1785950996, now seen corresponding path program 2 times [2021-07-13 20:21:10,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:10,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313679231] [2021-07-13 20:21:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:10,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:10,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313679231] [2021-07-13 20:21:10,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313679231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:10,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653243100] [2021-07-13 20:21:10,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:10,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:10,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:10,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:21:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:11,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653243100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:11,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:11,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:21:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655748626] [2021-07-13 20:21:11,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:11,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:11,398 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:11,770 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-07-13 20:21:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:21:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:21:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:11,772 INFO L225 Difference]: With dead ends: 116 [2021-07-13 20:21:11,772 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 20:21:11,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:21:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 20:21:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-07-13 20:21:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-07-13 20:21:11,778 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-07-13 20:21:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:11,778 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-07-13 20:21:11,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-07-13 20:21:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:11,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:11,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:11,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:11,997 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 828519660, now seen corresponding path program 3 times [2021-07-13 20:21:11,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:11,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246957434] [2021-07-13 20:21:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:12,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:12,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246957434] [2021-07-13 20:21:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246957434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:12,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723918013] [2021-07-13 20:21:12,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:12,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:21:12,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:21:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:12,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723918013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:12,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:12,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:12,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473578492] [2021-07-13 20:21:12,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:12,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:12,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:12,624 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:13,032 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-07-13 20:21:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:21:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 22 [2021-07-13 20:21:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:13,035 INFO L225 Difference]: With dead ends: 163 [2021-07-13 20:21:13,035 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 20:21:13,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 631.0ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:21:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 20:21:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-07-13 20:21:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-07-13 20:21:13,053 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-07-13 20:21:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:13,053 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-07-13 20:21:13,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-07-13 20:21:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:13,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:13,054 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:13,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:13,255 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1769874196, now seen corresponding path program 4 times [2021-07-13 20:21:13,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:13,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050602878] [2021-07-13 20:21:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:13,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:13,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050602878] [2021-07-13 20:21:13,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050602878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:13,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436688441] [2021-07-13 20:21:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:13,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:13,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:21:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:13,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436688441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:13,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:13,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:21:13,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223757704] [2021-07-13 20:21:13,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:13,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:13,824 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:14,513 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-07-13 20:21:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:21:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:21:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:14,515 INFO L225 Difference]: With dead ends: 201 [2021-07-13 20:21:14,515 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 20:21:14,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 733.2ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:21:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 20:21:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-07-13 20:21:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-07-13 20:21:14,520 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-07-13 20:21:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:14,520 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-07-13 20:21:14,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-07-13 20:21:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:14,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:14,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:14,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:21:14,738 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1242135592, now seen corresponding path program 5 times [2021-07-13 20:21:14,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:14,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428522008] [2021-07-13 20:21:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:14,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:14,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428522008] [2021-07-13 20:21:14,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428522008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:14,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717190822] [2021-07-13 20:21:14,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:14,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:21:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:15,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717190822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:15,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:15,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:15,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762245407] [2021-07-13 20:21:15,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:15,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:15,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:15,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:15,245 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:15,586 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-07-13 20:21:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:21:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 22 [2021-07-13 20:21:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:15,588 INFO L225 Difference]: With dead ends: 144 [2021-07-13 20:21:15,588 INFO L226 Difference]: Without dead ends: 130 [2021-07-13 20:21:15,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:21:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-13 20:21:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-07-13 20:21:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 177 transitions. [2021-07-13 20:21:15,592 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 177 transitions. Word has length 22 [2021-07-13 20:21:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:15,592 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 177 transitions. [2021-07-13 20:21:15,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 177 transitions. [2021-07-13 20:21:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:15,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:15,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:15,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:15,812 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1356258264, now seen corresponding path program 6 times [2021-07-13 20:21:15,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:15,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221376969] [2021-07-13 20:21:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:15,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:15,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221376969] [2021-07-13 20:21:15,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221376969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:15,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013500145] [2021-07-13 20:21:15,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:16,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:21:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:21:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:16,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013500145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:16,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:16,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-13 20:21:16,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493212300] [2021-07-13 20:21:16,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:21:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:21:16,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:21:16,264 INFO L87 Difference]: Start difference. First operand 90 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:16,853 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-07-13 20:21:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:21:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:21:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:16,855 INFO L225 Difference]: With dead ends: 199 [2021-07-13 20:21:16,855 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 20:21:16,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:21:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 20:21:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2021-07-13 20:21:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-07-13 20:21:16,870 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-07-13 20:21:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:16,872 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-07-13 20:21:16,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-07-13 20:21:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:16,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:16,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:17,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:21:17,073 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1781598820, now seen corresponding path program 7 times [2021-07-13 20:21:17,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:17,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049828807] [2021-07-13 20:21:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:17,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:17,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049828807] [2021-07-13 20:21:17,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049828807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:17,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447978585] [2021-07-13 20:21:17,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:17,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:21:17,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:17,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447978585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:17,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:17,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:21:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901516456] [2021-07-13 20:21:17,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:17,498 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:17,900 INFO L93 Difference]: Finished difference Result 172 states and 329 transitions. [2021-07-13 20:21:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:21:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:21:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:17,901 INFO L225 Difference]: With dead ends: 172 [2021-07-13 20:21:17,901 INFO L226 Difference]: Without dead ends: 130 [2021-07-13 20:21:17,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:21:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-13 20:21:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2021-07-13 20:21:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-07-13 20:21:17,912 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-07-13 20:21:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:17,912 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-07-13 20:21:17,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-07-13 20:21:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:21:17,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:17,914 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:18,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:21:18,130 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash 449508136, now seen corresponding path program 8 times [2021-07-13 20:21:18,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:18,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919559794] [2021-07-13 20:21:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:18,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:18,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919559794] [2021-07-13 20:21:18,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919559794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:18,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821087164] [2021-07-13 20:21:18,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:18,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:18,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:18,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:21:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:18,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821087164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:18,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:21:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413537494] [2021-07-13 20:21:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:21:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:21:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:21:18,554 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:18,982 INFO L93 Difference]: Finished difference Result 214 states and 410 transitions. [2021-07-13 20:21:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:21:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:21:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:18,983 INFO L225 Difference]: With dead ends: 214 [2021-07-13 20:21:18,983 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 20:21:18,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:21:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 20:21:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2021-07-13 20:21:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 93 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 183 transitions. [2021-07-13 20:21:18,987 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 183 transitions. Word has length 22 [2021-07-13 20:21:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:18,987 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 183 transitions. [2021-07-13 20:21:18,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 183 transitions. [2021-07-13 20:21:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:18,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:18,988 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:19,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:19,201 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1295303378, now seen corresponding path program 9 times [2021-07-13 20:21:19,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:19,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252610674] [2021-07-13 20:21:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:21:19,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:19,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252610674] [2021-07-13 20:21:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252610674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:19,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859103292] [2021-07-13 20:21:19,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:19,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:21:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:19,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859103292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:19,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:19,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-07-13 20:21:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885020269] [2021-07-13 20:21:19,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:21:19,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:21:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:21:19,720 INFO L87 Difference]: Start difference. First operand 94 states and 183 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:20,042 INFO L93 Difference]: Finished difference Result 186 states and 344 transitions. [2021-07-13 20:21:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:21:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:21:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:20,043 INFO L225 Difference]: With dead ends: 186 [2021-07-13 20:21:20,043 INFO L226 Difference]: Without dead ends: 140 [2021-07-13 20:21:20,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:21:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-13 20:21:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-07-13 20:21:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-07-13 20:21:20,046 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-07-13 20:21:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:20,046 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-07-13 20:21:20,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-07-13 20:21:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:20,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:20,047 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:20,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:21:20,261 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:20,261 INFO L82 PathProgramCache]: Analyzing trace with hash 886879146, now seen corresponding path program 10 times [2021-07-13 20:21:20,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:20,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434593719] [2021-07-13 20:21:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:21:20,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:20,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434593719] [2021-07-13 20:21:20,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434593719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:20,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068092309] [2021-07-13 20:21:20,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:20,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:20,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:20,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068092309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:20,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:20,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-07-13 20:21:20,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201484403] [2021-07-13 20:21:20,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:21:20,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:21:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:21:20,837 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:21,355 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-07-13 20:21:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:21:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:21:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:21,356 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:21:21,356 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 20:21:21,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 729.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:21:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 20:21:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-07-13 20:21:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-07-13 20:21:21,359 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-07-13 20:21:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:21,359 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-07-13 20:21:21,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-07-13 20:21:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:21,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:21,359 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:21,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:21:21,560 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1328794322, now seen corresponding path program 11 times [2021-07-13 20:21:21,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:21,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108401245] [2021-07-13 20:21:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:21:21,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:21,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108401245] [2021-07-13 20:21:21,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108401245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:21,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542112376] [2021-07-13 20:21:21,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:21,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:21:21,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:21,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542112376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:22,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:22,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-07-13 20:21:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98222392] [2021-07-13 20:21:22,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:21:22,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:22,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:21:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:21:22,191 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:22,938 INFO L93 Difference]: Finished difference Result 196 states and 367 transitions. [2021-07-13 20:21:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:21:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:21:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:22,939 INFO L225 Difference]: With dead ends: 196 [2021-07-13 20:21:22,939 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 20:21:22,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:21:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 20:21:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-07-13 20:21:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-07-13 20:21:22,943 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-07-13 20:21:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:22,943 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-07-13 20:21:22,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-07-13 20:21:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:22,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:22,943 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:23,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:23,144 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -727951854, now seen corresponding path program 12 times [2021-07-13 20:21:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918302592] [2021-07-13 20:21:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:23,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:23,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918302592] [2021-07-13 20:21:23,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918302592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:23,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297654409] [2021-07-13 20:21:23,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:23,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:21:23,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:21:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:23,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297654409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:23,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:23,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977719460] [2021-07-13 20:21:23,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:23,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:23,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:23,653 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:23,983 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-07-13 20:21:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:21:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:21:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:23,985 INFO L225 Difference]: With dead ends: 168 [2021-07-13 20:21:23,985 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 20:21:23,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:21:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 20:21:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-07-13 20:21:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-07-13 20:21:23,988 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-07-13 20:21:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:23,988 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-07-13 20:21:23,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-07-13 20:21:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:23,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:23,988 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:21:24,204 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -966844970, now seen corresponding path program 13 times [2021-07-13 20:21:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690303989] [2021-07-13 20:21:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:24,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690303989] [2021-07-13 20:21:24,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690303989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558134284] [2021-07-13 20:21:24,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:21:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558134284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:24,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:24,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:21:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254290782] [2021-07-13 20:21:24,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:21:24,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:21:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:21:24,691 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:25,066 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-07-13 20:21:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:21:25,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:21:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:25,067 INFO L225 Difference]: With dead ends: 163 [2021-07-13 20:21:25,067 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 20:21:25,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 559.4ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:21:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 20:21:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-07-13 20:21:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-07-13 20:21:25,070 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-07-13 20:21:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:25,070 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-07-13 20:21:25,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-07-13 20:21:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:25,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:25,070 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:25,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:25,287 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1813322510, now seen corresponding path program 14 times [2021-07-13 20:21:25,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:25,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189206779] [2021-07-13 20:21:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:25,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189206779] [2021-07-13 20:21:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189206779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919508466] [2021-07-13 20:21:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:25,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:25,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:25,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:25,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:25,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919508466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:25,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:25,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-13 20:21:25,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014268838] [2021-07-13 20:21:25,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:21:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:21:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:25,930 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:26,497 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-07-13 20:21:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:21:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:26,499 INFO L225 Difference]: With dead ends: 277 [2021-07-13 20:21:26,499 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 20:21:26,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:21:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 20:21:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-07-13 20:21:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-07-13 20:21:26,503 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-07-13 20:21:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:26,503 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-07-13 20:21:26,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-07-13 20:21:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:26,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:26,503 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:26,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 20:21:26,720 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1763754766, now seen corresponding path program 15 times [2021-07-13 20:21:26,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:26,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314374207] [2021-07-13 20:21:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:26,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:26,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314374207] [2021-07-13 20:21:26,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314374207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:26,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447288728] [2021-07-13 20:21:26,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:26,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:21:26,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:27,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447288728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:27,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:27,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:21:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062588332] [2021-07-13 20:21:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:21:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:27,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:21:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:21:27,340 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:28,664 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-07-13 20:21:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:21:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:28,666 INFO L225 Difference]: With dead ends: 345 [2021-07-13 20:21:28,666 INFO L226 Difference]: Without dead ends: 331 [2021-07-13 20:21:28,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1370.3ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:21:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-13 20:21:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-07-13 20:21:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-07-13 20:21:28,670 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-07-13 20:21:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:28,670 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-07-13 20:21:28,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-07-13 20:21:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:28,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:28,671 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:28,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:28,885 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 83258126, now seen corresponding path program 16 times [2021-07-13 20:21:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985691390] [2021-07-13 20:21:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:29,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:29,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985691390] [2021-07-13 20:21:29,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985691390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:29,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009636025] [2021-07-13 20:21:29,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:29,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:29,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009636025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:29,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:29,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:21:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758094391] [2021-07-13 20:21:29,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:21:29,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:29,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:21:29,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:21:29,548 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:31,260 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-07-13 20:21:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:21:31,260 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:31,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:31,261 INFO L225 Difference]: With dead ends: 351 [2021-07-13 20:21:31,261 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 20:21:31,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1764.1ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:21:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 20:21:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-07-13 20:21:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-07-13 20:21:31,266 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-07-13 20:21:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:31,266 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-07-13 20:21:31,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-07-13 20:21:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:31,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:31,267 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:31,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:21:31,477 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1779831566, now seen corresponding path program 17 times [2021-07-13 20:21:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:31,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407939710] [2021-07-13 20:21:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:31,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:31,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407939710] [2021-07-13 20:21:31,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407939710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:31,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647227555] [2021-07-13 20:21:31,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:31,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:21:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:31,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:21:31,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:32,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647227555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:32,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:32,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-07-13 20:21:32,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304156623] [2021-07-13 20:21:32,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:21:32,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:21:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:21:32,243 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:35,230 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-07-13 20:21:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:21:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:35,231 INFO L225 Difference]: With dead ends: 411 [2021-07-13 20:21:35,231 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 20:21:35,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2917.8ms TimeCoverageRelationStatistics Valid=1079, Invalid=8041, Unknown=0, NotChecked=0, Total=9120 [2021-07-13 20:21:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 20:21:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-07-13 20:21:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-07-13 20:21:35,237 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-07-13 20:21:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:35,237 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-07-13 20:21:35,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-07-13 20:21:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:35,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:35,237 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:35,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:35,438 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:35,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1450173818, now seen corresponding path program 18 times [2021-07-13 20:21:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:35,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558946637] [2021-07-13 20:21:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:35,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558946637] [2021-07-13 20:21:35,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558946637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331079780] [2021-07-13 20:21:35,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:35,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:21:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:36,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331079780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:36,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:36,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:21:36,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760825846] [2021-07-13 20:21:36,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:21:36,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:21:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:21:36,076 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:36,984 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-07-13 20:21:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:21:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:36,985 INFO L225 Difference]: With dead ends: 331 [2021-07-13 20:21:36,985 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 20:21:36,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1045.0ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:21:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 20:21:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-07-13 20:21:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-07-13 20:21:36,990 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-07-13 20:21:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:36,990 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-07-13 20:21:36,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:36,990 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-07-13 20:21:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:36,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:36,990 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:37,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:37,201 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 246399622, now seen corresponding path program 19 times [2021-07-13 20:21:37,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:37,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615028576] [2021-07-13 20:21:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:37,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:37,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615028576] [2021-07-13 20:21:37,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615028576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:37,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466229165] [2021-07-13 20:21:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:21:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:37,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:37,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:37,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466229165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:37,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:37,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 20:21:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343599451] [2021-07-13 20:21:37,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:21:37,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:21:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:37,821 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:39,052 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-07-13 20:21:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:21:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:39,054 INFO L225 Difference]: With dead ends: 389 [2021-07-13 20:21:39,054 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 20:21:39,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1224.1ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:21:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 20:21:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-07-13 20:21:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-07-13 20:21:39,059 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-07-13 20:21:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:39,059 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-07-13 20:21:39,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-07-13 20:21:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:39,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:39,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:39,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:21:39,275 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash -910710590, now seen corresponding path program 20 times [2021-07-13 20:21:39,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:39,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594788819] [2021-07-13 20:21:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:39,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:39,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594788819] [2021-07-13 20:21:39,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594788819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:39,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063903242] [2021-07-13 20:21:39,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:39,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:39,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:39,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063903242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:39,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:39,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:21:39,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807370407] [2021-07-13 20:21:39,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:21:39,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:39,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:21:39,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:39,858 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:40,627 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-07-13 20:21:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:21:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:40,629 INFO L225 Difference]: With dead ends: 364 [2021-07-13 20:21:40,629 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 20:21:40,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 929.7ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:21:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 20:21:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-07-13 20:21:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-07-13 20:21:40,634 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-07-13 20:21:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:40,634 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-07-13 20:21:40,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-07-13 20:21:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:40,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:40,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:40,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:40,852 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1689066934, now seen corresponding path program 21 times [2021-07-13 20:21:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386209950] [2021-07-13 20:21:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:40,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:40,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386209950] [2021-07-13 20:21:40,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386209950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:40,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075690247] [2021-07-13 20:21:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:41,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:21:41,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:41,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:41,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075690247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:41,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:41,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:21:41,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835641745] [2021-07-13 20:21:41,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:21:41,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:21:41,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:21:41,434 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:42,426 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-07-13 20:21:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:21:42,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:42,428 INFO L225 Difference]: With dead ends: 410 [2021-07-13 20:21:42,428 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 20:21:42,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1040.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:21:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 20:21:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-07-13 20:21:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-07-13 20:21:42,436 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-07-13 20:21:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:42,437 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-07-13 20:21:42,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-07-13 20:21:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:42,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:42,437 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:42,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:21:42,654 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:42,654 INFO L82 PathProgramCache]: Analyzing trace with hash 7506506, now seen corresponding path program 22 times [2021-07-13 20:21:42,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480443164] [2021-07-13 20:21:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:42,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:42,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480443164] [2021-07-13 20:21:42,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480443164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:42,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309386002] [2021-07-13 20:21:42,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:42,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:43,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309386002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:43,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:43,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 20:21:43,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108388875] [2021-07-13 20:21:43,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:21:43,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:21:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:43,271 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:44,849 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-07-13 20:21:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:21:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:44,851 INFO L225 Difference]: With dead ends: 464 [2021-07-13 20:21:44,851 INFO L226 Difference]: Without dead ends: 432 [2021-07-13 20:21:44,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1544.4ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:21:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-07-13 20:21:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-07-13 20:21:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-07-13 20:21:44,856 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-07-13 20:21:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:44,856 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-07-13 20:21:44,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-07-13 20:21:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:44,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:44,856 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:45,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:45,072 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1149603706, now seen corresponding path program 23 times [2021-07-13 20:21:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:45,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720512543] [2021-07-13 20:21:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:45,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:45,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720512543] [2021-07-13 20:21:45,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720512543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713549736] [2021-07-13 20:21:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:45,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:21:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:45,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713549736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:45,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:45,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:21:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179449437] [2021-07-13 20:21:45,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:21:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:21:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:45,656 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:46,890 INFO L93 Difference]: Finished difference Result 416 states and 851 transitions. [2021-07-13 20:21:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:21:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:46,891 INFO L225 Difference]: With dead ends: 416 [2021-07-13 20:21:46,891 INFO L226 Difference]: Without dead ends: 374 [2021-07-13 20:21:46,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1203.7ms TimeCoverageRelationStatistics Valid=585, Invalid=3197, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:21:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-13 20:21:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2021-07-13 20:21:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2021-07-13 20:21:46,900 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 27 [2021-07-13 20:21:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:46,900 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2021-07-13 20:21:46,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2021-07-13 20:21:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:46,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:46,901 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:47,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:47,113 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272906, now seen corresponding path program 24 times [2021-07-13 20:21:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:47,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484090703] [2021-07-13 20:21:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:47,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484090703] [2021-07-13 20:21:47,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484090703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533339251] [2021-07-13 20:21:47,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:47,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:21:47,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:47,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533339251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:47,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:47,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:21:47,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113262948] [2021-07-13 20:21:47,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:21:47,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:21:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:47,677 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:48,892 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2021-07-13 20:21:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:21:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:48,893 INFO L225 Difference]: With dead ends: 478 [2021-07-13 20:21:48,893 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 20:21:48,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1234.2ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:21:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 20:21:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 184. [2021-07-13 20:21:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1147540983606556) internal successors, (387), 183 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 387 transitions. [2021-07-13 20:21:48,897 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 387 transitions. Word has length 27 [2021-07-13 20:21:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:48,897 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 387 transitions. [2021-07-13 20:21:48,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 387 transitions. [2021-07-13 20:21:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:48,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:48,898 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:49,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:21:49,098 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1183589754, now seen corresponding path program 25 times [2021-07-13 20:21:49,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:49,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186774538] [2021-07-13 20:21:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:49,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:49,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186774538] [2021-07-13 20:21:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186774538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:49,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858672139] [2021-07-13 20:21:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:49,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858672139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:49,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:49,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-13 20:21:49,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659670367] [2021-07-13 20:21:49,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:21:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:21:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:49,731 INFO L87 Difference]: Start difference. First operand 184 states and 387 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:50,758 INFO L93 Difference]: Finished difference Result 535 states and 1056 transitions. [2021-07-13 20:21:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:21:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:50,760 INFO L225 Difference]: With dead ends: 535 [2021-07-13 20:21:50,761 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 20:21:50,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1055.3ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:21:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 20:21:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-07-13 20:21:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-07-13 20:21:50,765 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-07-13 20:21:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:50,765 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-07-13 20:21:50,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-07-13 20:21:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:50,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:50,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:50,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:50,983 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash 512983686, now seen corresponding path program 26 times [2021-07-13 20:21:50,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:50,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568690249] [2021-07-13 20:21:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:51,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:51,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568690249] [2021-07-13 20:21:51,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568690249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:51,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321627666] [2021-07-13 20:21:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:51,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:51,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:51,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:21:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:51,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321627666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:51,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:51,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:21:51,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025157121] [2021-07-13 20:21:51,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:51,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:51,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:51,517 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:53,177 INFO L93 Difference]: Finished difference Result 600 states and 1200 transitions. [2021-07-13 20:21:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:21:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:53,179 INFO L225 Difference]: With dead ends: 600 [2021-07-13 20:21:53,179 INFO L226 Difference]: Without dead ends: 580 [2021-07-13 20:21:53,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1454.4ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:21:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-07-13 20:21:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 265. [2021-07-13 20:21:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-07-13 20:21:53,185 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-07-13 20:21:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:53,185 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-07-13 20:21:53,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-07-13 20:21:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:53,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:53,186 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:53,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:21:53,402 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash -644126526, now seen corresponding path program 27 times [2021-07-13 20:21:53,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:53,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719594417] [2021-07-13 20:21:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:53,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:53,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719594417] [2021-07-13 20:21:53,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719594417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:53,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253103513] [2021-07-13 20:21:53,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:53,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:21:53,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:53,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:21:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:53,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253103513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:53,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:53,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:21:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715148097] [2021-07-13 20:21:53,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:53,958 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:55,624 INFO L93 Difference]: Finished difference Result 651 states and 1311 transitions. [2021-07-13 20:21:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:21:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:55,626 INFO L225 Difference]: With dead ends: 651 [2021-07-13 20:21:55,627 INFO L226 Difference]: Without dead ends: 615 [2021-07-13 20:21:55,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1482.2ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:21:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-07-13 20:21:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 263. [2021-07-13 20:21:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.187022900763359) internal successors, (573), 262 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 573 transitions. [2021-07-13 20:21:55,631 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 573 transitions. Word has length 27 [2021-07-13 20:21:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:55,631 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 573 transitions. [2021-07-13 20:21:55,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 573 transitions. [2021-07-13 20:21:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:55,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:55,632 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:55,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:55,846 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -516363890, now seen corresponding path program 28 times [2021-07-13 20:21:55,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:55,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970471313] [2021-07-13 20:21:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:56,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:56,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970471313] [2021-07-13 20:21:56,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970471313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:56,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649074563] [2021-07-13 20:21:56,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:56,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:21:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:56,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649074563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:56,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:56,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-13 20:21:56,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028793658] [2021-07-13 20:21:56,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:21:56,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:21:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:21:56,455 INFO L87 Difference]: Start difference. First operand 263 states and 573 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:57,024 INFO L93 Difference]: Finished difference Result 387 states and 795 transitions. [2021-07-13 20:21:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:21:57,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:57,026 INFO L225 Difference]: With dead ends: 387 [2021-07-13 20:21:57,026 INFO L226 Difference]: Without dead ends: 373 [2021-07-13 20:21:57,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 771.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:21:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-13 20:21:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 275. [2021-07-13 20:21:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-13 20:21:57,031 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-07-13 20:21:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:57,031 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-13 20:21:57,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-13 20:21:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:57,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:57,031 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:57,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 20:21:57,248 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:57,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2098106766, now seen corresponding path program 29 times [2021-07-13 20:21:57,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:57,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413794049] [2021-07-13 20:21:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:57,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413794049] [2021-07-13 20:21:57,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413794049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:57,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540744376] [2021-07-13 20:21:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:21:57,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:21:57,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:57,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540744376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:57,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:57,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-13 20:21:57,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19546820] [2021-07-13 20:21:57,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:21:57,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:57,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:21:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:21:57,878 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:58,774 INFO L93 Difference]: Finished difference Result 462 states and 951 transitions. [2021-07-13 20:21:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:21:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:21:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:58,776 INFO L225 Difference]: With dead ends: 462 [2021-07-13 20:21:58,776 INFO L226 Difference]: Without dead ends: 448 [2021-07-13 20:21:58,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1052.8ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:21:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-13 20:21:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-07-13 20:21:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.199275362318841) internal successors, (607), 276 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 607 transitions. [2021-07-13 20:21:58,781 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 607 transitions. Word has length 27 [2021-07-13 20:21:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:58,781 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 607 transitions. [2021-07-13 20:21:58,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 607 transitions. [2021-07-13 20:21:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:21:58,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:58,782 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:58,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:21:58,998 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash -500287090, now seen corresponding path program 30 times [2021-07-13 20:21:58,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:58,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362841710] [2021-07-13 20:21:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:59,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:59,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362841710] [2021-07-13 20:21:59,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362841710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099256658] [2021-07-13 20:21:59,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:59,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:21:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:21:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099256658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:59,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:21:59,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172073088] [2021-07-13 20:21:59,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:21:59,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:21:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:21:59,593 INFO L87 Difference]: Start difference. First operand 277 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:00,906 INFO L93 Difference]: Finished difference Result 541 states and 1110 transitions. [2021-07-13 20:22:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:22:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:00,908 INFO L225 Difference]: With dead ends: 541 [2021-07-13 20:22:00,908 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 20:22:00,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1327.9ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:22:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 20:22:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 275. [2021-07-13 20:22:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-13 20:22:00,913 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-07-13 20:22:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:00,921 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-13 20:22:00,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-13 20:22:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:00,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:00,922 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:01,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:01,133 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1243781370, now seen corresponding path program 31 times [2021-07-13 20:22:01,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:01,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953864921] [2021-07-13 20:22:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:01,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953864921] [2021-07-13 20:22:01,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953864921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:01,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712505963] [2021-07-13 20:22:01,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:22:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712505963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:01,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:01,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:22:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977665350] [2021-07-13 20:22:01,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:01,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:01,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:01,686 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:02,609 INFO L93 Difference]: Finished difference Result 489 states and 1029 transitions. [2021-07-13 20:22:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:22:02,609 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:02,611 INFO L225 Difference]: With dead ends: 489 [2021-07-13 20:22:02,611 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 20:22:02,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:22:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 20:22:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 275. [2021-07-13 20:22:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-07-13 20:22:02,615 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-07-13 20:22:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:02,615 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-07-13 20:22:02,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-07-13 20:22:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:02,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:02,616 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:02,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:02,825 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1179632014, now seen corresponding path program 32 times [2021-07-13 20:22:02,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:02,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536095974] [2021-07-13 20:22:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:02,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536095974] [2021-07-13 20:22:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536095974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:02,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364563880] [2021-07-13 20:22:02,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:03,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:03,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:22:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:03,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364563880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:03,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:03,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-13 20:22:03,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135847093] [2021-07-13 20:22:03,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:03,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:03,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:03,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:03,406 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:04,249 INFO L93 Difference]: Finished difference Result 464 states and 973 transitions. [2021-07-13 20:22:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:22:04,249 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:04,251 INFO L225 Difference]: With dead ends: 464 [2021-07-13 20:22:04,251 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 20:22:04,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 946.7ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:22:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 20:22:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-07-13 20:22:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-07-13 20:22:04,255 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-07-13 20:22:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:04,255 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-07-13 20:22:04,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-07-13 20:22:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:04,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:04,256 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:04,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:22:04,472 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761842, now seen corresponding path program 33 times [2021-07-13 20:22:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:04,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731917397] [2021-07-13 20:22:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:04,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731917397] [2021-07-13 20:22:04,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731917397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434464886] [2021-07-13 20:22:04,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:04,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:22:04,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:22:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:05,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434464886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:05,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:05,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:22:05,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263152609] [2021-07-13 20:22:05,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:05,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:05,039 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:06,374 INFO L93 Difference]: Finished difference Result 569 states and 1201 transitions. [2021-07-13 20:22:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:22:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:06,376 INFO L225 Difference]: With dead ends: 569 [2021-07-13 20:22:06,376 INFO L226 Difference]: Without dead ends: 537 [2021-07-13 20:22:06,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1308.2ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:22:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-13 20:22:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 295. [2021-07-13 20:22:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-07-13 20:22:06,381 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-07-13 20:22:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:06,381 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-07-13 20:22:06,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-07-13 20:22:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:06,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:06,381 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:06,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-07-13 20:22:06,598 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1719095242, now seen corresponding path program 34 times [2021-07-13 20:22:06,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:06,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116705421] [2021-07-13 20:22:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:06,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116705421] [2021-07-13 20:22:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116705421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314756683] [2021-07-13 20:22:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:06,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:22:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:07,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314756683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:07,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:07,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:22:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602753325] [2021-07-13 20:22:07,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:07,147 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:08,152 INFO L93 Difference]: Finished difference Result 627 states and 1345 transitions. [2021-07-13 20:22:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:22:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:08,154 INFO L225 Difference]: With dead ends: 627 [2021-07-13 20:22:08,154 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 20:22:08,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1050.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:22:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 20:22:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 289. [2021-07-13 20:22:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.1979166666666665) internal successors, (633), 288 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 633 transitions. [2021-07-13 20:22:08,159 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 633 transitions. Word has length 27 [2021-07-13 20:22:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:08,159 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 633 transitions. [2021-07-13 20:22:08,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 633 transitions. [2021-07-13 20:22:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:08,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:08,159 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:08,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:08,370 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2141436106, now seen corresponding path program 35 times [2021-07-13 20:22:08,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:08,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788791526] [2021-07-13 20:22:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:08,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:08,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788791526] [2021-07-13 20:22:08,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788791526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:08,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220970070] [2021-07-13 20:22:08,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:08,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:08,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:08,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:08,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220970070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:08,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:08,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-13 20:22:08,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385129188] [2021-07-13 20:22:08,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:08,841 INFO L87 Difference]: Start difference. First operand 289 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:09,530 INFO L93 Difference]: Finished difference Result 564 states and 1163 transitions. [2021-07-13 20:22:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:22:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:09,546 INFO L225 Difference]: With dead ends: 564 [2021-07-13 20:22:09,546 INFO L226 Difference]: Without dead ends: 550 [2021-07-13 20:22:09,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:22:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-13 20:22:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 362. [2021-07-13 20:22:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.224376731301939) internal successors, (803), 361 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 803 transitions. [2021-07-13 20:22:09,556 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 803 transitions. Word has length 27 [2021-07-13 20:22:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:09,556 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 803 transitions. [2021-07-13 20:22:09,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 803 transitions. [2021-07-13 20:22:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:09,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:09,557 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:09,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 20:22:09,767 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash -456957750, now seen corresponding path program 36 times [2021-07-13 20:22:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:09,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293555272] [2021-07-13 20:22:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:09,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:09,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293555272] [2021-07-13 20:22:09,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293555272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:09,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478913577] [2021-07-13 20:22:09,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:09,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:22:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:10,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478913577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:10,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:10,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:22:10,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003223413] [2021-07-13 20:22:10,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:10,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:10,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:10,326 INFO L87 Difference]: Start difference. First operand 362 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:11,868 INFO L93 Difference]: Finished difference Result 680 states and 1421 transitions. [2021-07-13 20:22:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:22:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:11,873 INFO L225 Difference]: With dead ends: 680 [2021-07-13 20:22:11,873 INFO L226 Difference]: Without dead ends: 660 [2021-07-13 20:22:11,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1432.1ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:22:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-07-13 20:22:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 376. [2021-07-13 20:22:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-07-13 20:22:11,894 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-07-13 20:22:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:11,894 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-07-13 20:22:11,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-07-13 20:22:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:11,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:11,897 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:12,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:22:12,098 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:12,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1614067962, now seen corresponding path program 37 times [2021-07-13 20:22:12,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:12,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666023255] [2021-07-13 20:22:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:12,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666023255] [2021-07-13 20:22:12,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666023255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64503759] [2021-07-13 20:22:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:22:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64503759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:12,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:22:12,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497061767] [2021-07-13 20:22:12,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:12,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:12,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:12,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:12,635 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:13,984 INFO L93 Difference]: Finished difference Result 716 states and 1504 transitions. [2021-07-13 20:22:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:22:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:13,987 INFO L225 Difference]: With dead ends: 716 [2021-07-13 20:22:13,987 INFO L226 Difference]: Without dead ends: 680 [2021-07-13 20:22:13,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1277.7ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:22:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-13 20:22:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 376. [2021-07-13 20:22:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-07-13 20:22:13,993 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-07-13 20:22:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:13,993 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-07-13 20:22:13,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-07-13 20:22:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:13,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:13,994 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:14,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 20:22:14,209 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1912494094, now seen corresponding path program 38 times [2021-07-13 20:22:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:14,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671716268] [2021-07-13 20:22:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:14,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671716268] [2021-07-13 20:22:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671716268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732080692] [2021-07-13 20:22:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:14,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:14,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:22:14,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732080692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:14,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:14,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-13 20:22:14,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825625631] [2021-07-13 20:22:14,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:22:14,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:22:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:22:14,796 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:15,510 INFO L93 Difference]: Finished difference Result 658 states and 1384 transitions. [2021-07-13 20:22:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:22:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:15,512 INFO L225 Difference]: With dead ends: 658 [2021-07-13 20:22:15,512 INFO L226 Difference]: Without dead ends: 644 [2021-07-13 20:22:15,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 843.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:22:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-13 20:22:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 458. [2021-07-13 20:22:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2450765864332602) internal successors, (1026), 457 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1026 transitions. [2021-07-13 20:22:15,518 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1026 transitions. Word has length 27 [2021-07-13 20:22:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:15,518 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1026 transitions. [2021-07-13 20:22:15,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1026 transitions. [2021-07-13 20:22:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:15,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:15,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:15,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 20:22:15,735 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash -685899762, now seen corresponding path program 39 times [2021-07-13 20:22:15,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:15,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819128738] [2021-07-13 20:22:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:15,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:15,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819128738] [2021-07-13 20:22:15,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819128738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:15,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813020148] [2021-07-13 20:22:15,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:15,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:22:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:22:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:16,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813020148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:16,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:16,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:22:16,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435142645] [2021-07-13 20:22:16,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:16,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:16,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:16,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:16,313 INFO L87 Difference]: Start difference. First operand 458 states and 1026 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:17,644 INFO L93 Difference]: Finished difference Result 751 states and 1599 transitions. [2021-07-13 20:22:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:22:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:17,647 INFO L225 Difference]: With dead ends: 751 [2021-07-13 20:22:17,647 INFO L226 Difference]: Without dead ends: 731 [2021-07-13 20:22:17,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1292.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:22:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-13 20:22:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 401. [2021-07-13 20:22:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.23) internal successors, (892), 400 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 892 transitions. [2021-07-13 20:22:17,654 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 892 transitions. Word has length 27 [2021-07-13 20:22:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:17,654 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 892 transitions. [2021-07-13 20:22:17,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 892 transitions. [2021-07-13 20:22:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:17,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:17,655 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:17,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 20:22:17,863 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash -620373174, now seen corresponding path program 40 times [2021-07-13 20:22:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:17,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658159314] [2021-07-13 20:22:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:18,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:18,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658159314] [2021-07-13 20:22:18,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658159314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:18,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511317098] [2021-07-13 20:22:18,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:18,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:18,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:18,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:18,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:18,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511317098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:18,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:18,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:22:18,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007423516] [2021-07-13 20:22:18,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:18,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:18,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:18,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:18,376 INFO L87 Difference]: Start difference. First operand 401 states and 892 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:19,056 INFO L93 Difference]: Finished difference Result 681 states and 1412 transitions. [2021-07-13 20:22:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:22:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:19,058 INFO L225 Difference]: With dead ends: 681 [2021-07-13 20:22:19,058 INFO L226 Difference]: Without dead ends: 667 [2021-07-13 20:22:19,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 697.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:22:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-07-13 20:22:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 473. [2021-07-13 20:22:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.266949152542373) internal successors, (1070), 472 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1070 transitions. [2021-07-13 20:22:19,085 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1070 transitions. Word has length 27 [2021-07-13 20:22:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:19,085 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1070 transitions. [2021-07-13 20:22:19,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1070 transitions. [2021-07-13 20:22:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:19,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:19,086 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:19,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:19,303 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:19,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1994097482, now seen corresponding path program 41 times [2021-07-13 20:22:19,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:19,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823346427] [2021-07-13 20:22:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:19,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823346427] [2021-07-13 20:22:19,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823346427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730661872] [2021-07-13 20:22:19,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:19,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:19,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730661872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:19,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:22:19,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226719631] [2021-07-13 20:22:19,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:22:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:22:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:22:19,932 INFO L87 Difference]: Start difference. First operand 473 states and 1070 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:21,163 INFO L93 Difference]: Finished difference Result 783 states and 1648 transitions. [2021-07-13 20:22:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:22:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:21,166 INFO L225 Difference]: With dead ends: 783 [2021-07-13 20:22:21,166 INFO L226 Difference]: Without dead ends: 769 [2021-07-13 20:22:21,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1245.1ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:22:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-07-13 20:22:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 474. [2021-07-13 20:22:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.2769556025369977) internal successors, (1077), 473 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1077 transitions. [2021-07-13 20:22:21,172 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1077 transitions. Word has length 27 [2021-07-13 20:22:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:21,173 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1077 transitions. [2021-07-13 20:22:21,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1077 transitions. [2021-07-13 20:22:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:21,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:21,173 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:21,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 20:22:21,374 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -604296374, now seen corresponding path program 42 times [2021-07-13 20:22:21,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:21,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432959935] [2021-07-13 20:22:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:21,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:21,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432959935] [2021-07-13 20:22:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432959935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:21,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128918416] [2021-07-13 20:22:21,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:21,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:22:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:21,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128918416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:21,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:21,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 20:22:21,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297304778] [2021-07-13 20:22:21,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:21,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:21,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:21,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:21,912 INFO L87 Difference]: Start difference. First operand 474 states and 1077 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:23,529 INFO L93 Difference]: Finished difference Result 813 states and 1728 transitions. [2021-07-13 20:22:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:22:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:23,533 INFO L225 Difference]: With dead ends: 813 [2021-07-13 20:22:23,533 INFO L226 Difference]: Without dead ends: 777 [2021-07-13 20:22:23,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1566.2ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:22:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-07-13 20:22:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 467. [2021-07-13 20:22:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2618025751072963) internal successors, (1054), 466 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1054 transitions. [2021-07-13 20:22:23,542 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1054 transitions. Word has length 27 [2021-07-13 20:22:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:23,542 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1054 transitions. [2021-07-13 20:22:23,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1054 transitions. [2021-07-13 20:22:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:23,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:23,543 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:23,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:23,757 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1347790654, now seen corresponding path program 43 times [2021-07-13 20:22:23,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:23,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127693742] [2021-07-13 20:22:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127693742] [2021-07-13 20:22:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127693742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682494109] [2021-07-13 20:22:23,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:22:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:23,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:22:23,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682494109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:24,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:24,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 20:22:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466076335] [2021-07-13 20:22:24,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:24,218 INFO L87 Difference]: Start difference. First operand 467 states and 1054 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:24,841 INFO L93 Difference]: Finished difference Result 765 states and 1611 transitions. [2021-07-13 20:22:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:22:24,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:24,844 INFO L225 Difference]: With dead ends: 765 [2021-07-13 20:22:24,844 INFO L226 Difference]: Without dead ends: 739 [2021-07-13 20:22:24,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 641.1ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:22:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-13 20:22:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 506. [2021-07-13 20:22:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.257425742574257) internal successors, (1140), 505 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1140 transitions. [2021-07-13 20:22:24,851 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1140 transitions. Word has length 27 [2021-07-13 20:22:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:24,851 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1140 transitions. [2021-07-13 20:22:24,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1140 transitions. [2021-07-13 20:22:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:24,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:24,857 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:25,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:22:25,073 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1615085958, now seen corresponding path program 44 times [2021-07-13 20:22:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:25,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527510286] [2021-07-13 20:22:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:25,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:25,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527510286] [2021-07-13 20:22:25,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527510286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:25,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365862432] [2021-07-13 20:22:25,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:25,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:22:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:25,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365862432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:25,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:25,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 20:22:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67640326] [2021-07-13 20:22:25,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:22:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:22:25,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:25,477 INFO L87 Difference]: Start difference. First operand 506 states and 1140 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:26,433 INFO L93 Difference]: Finished difference Result 878 states and 1897 transitions. [2021-07-13 20:22:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:22:26,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:26,436 INFO L225 Difference]: With dead ends: 878 [2021-07-13 20:22:26,436 INFO L226 Difference]: Without dead ends: 842 [2021-07-13 20:22:26,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:22:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-07-13 20:22:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 455. [2021-07-13 20:22:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.251101321585903) internal successors, (1022), 454 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1022 transitions. [2021-07-13 20:22:26,443 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1022 transitions. Word has length 27 [2021-07-13 20:22:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:26,443 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1022 transitions. [2021-07-13 20:22:26,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1022 transitions. [2021-07-13 20:22:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:26,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:26,444 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:26,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:26,660 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:26,660 INFO L82 PathProgramCache]: Analyzing trace with hash -735982520, now seen corresponding path program 45 times [2021-07-13 20:22:26,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:26,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885568181] [2021-07-13 20:22:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:26,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885568181] [2021-07-13 20:22:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885568181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243602621] [2021-07-13 20:22:26,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:26,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:26,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:27,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243602621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:27,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:27,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-13 20:22:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624945127] [2021-07-13 20:22:27,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:22:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:22:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:22:27,270 INFO L87 Difference]: Start difference. First operand 455 states and 1022 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:27,878 INFO L93 Difference]: Finished difference Result 619 states and 1331 transitions. [2021-07-13 20:22:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:22:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:27,880 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:22:27,880 INFO L226 Difference]: Without dead ends: 545 [2021-07-13 20:22:27,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 751.7ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:22:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-13 20:22:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2021-07-13 20:22:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.1983967935871744) internal successors, (1097), 499 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1097 transitions. [2021-07-13 20:22:27,886 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1097 transitions. Word has length 29 [2021-07-13 20:22:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:27,886 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1097 transitions. [2021-07-13 20:22:27,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1097 transitions. [2021-07-13 20:22:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:27,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:27,887 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:28,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:22:28,104 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1495767748, now seen corresponding path program 46 times [2021-07-13 20:22:28,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:28,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81190423] [2021-07-13 20:22:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:28,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81190423] [2021-07-13 20:22:28,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81190423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374026391] [2021-07-13 20:22:28,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:28,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:28,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:28,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374026391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:28,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:28,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-13 20:22:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048573034] [2021-07-13 20:22:28,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:22:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:22:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:22:28,652 INFO L87 Difference]: Start difference. First operand 500 states and 1097 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:29,472 INFO L93 Difference]: Finished difference Result 591 states and 1253 transitions. [2021-07-13 20:22:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:22:29,472 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:29,474 INFO L225 Difference]: With dead ends: 591 [2021-07-13 20:22:29,474 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 20:22:29,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 980.6ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:22:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 20:22:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 503. [2021-07-13 20:22:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.195219123505976) internal successors, (1102), 502 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1102 transitions. [2021-07-13 20:22:29,482 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1102 transitions. Word has length 29 [2021-07-13 20:22:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:29,482 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1102 transitions. [2021-07-13 20:22:29,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1102 transitions. [2021-07-13 20:22:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:29,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:29,483 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:29,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-13 20:22:29,699 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash -719905720, now seen corresponding path program 47 times [2021-07-13 20:22:29,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:29,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042823398] [2021-07-13 20:22:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:29,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:29,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042823398] [2021-07-13 20:22:29,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042823398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:29,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887629837] [2021-07-13 20:22:29,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:29,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:22:29,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:29,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:29,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:30,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887629837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:30,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:30,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-13 20:22:30,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964094672] [2021-07-13 20:22:30,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:22:30,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:22:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:22:30,347 INFO L87 Difference]: Start difference. First operand 503 states and 1102 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:31,591 INFO L93 Difference]: Finished difference Result 627 states and 1326 transitions. [2021-07-13 20:22:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:22:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:31,593 INFO L225 Difference]: With dead ends: 627 [2021-07-13 20:22:31,593 INFO L226 Difference]: Without dead ends: 601 [2021-07-13 20:22:31,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1350.3ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:22:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-13 20:22:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 485. [2021-07-13 20:22:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.2024793388429753) internal successors, (1066), 484 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1066 transitions. [2021-07-13 20:22:31,599 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1066 transitions. Word has length 29 [2021-07-13 20:22:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:31,600 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1066 transitions. [2021-07-13 20:22:31,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1066 transitions. [2021-07-13 20:22:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:31,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:31,600 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:31,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 20:22:31,816 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:31,816 INFO L82 PathProgramCache]: Analyzing trace with hash -682384688, now seen corresponding path program 48 times [2021-07-13 20:22:31,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331725125] [2021-07-13 20:22:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:22:31,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:31,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331725125] [2021-07-13 20:22:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331725125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150400778] [2021-07-13 20:22:31,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:31,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:31,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:31,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:32,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150400778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:32,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:32,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:32,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201842799] [2021-07-13 20:22:32,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:32,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:32,302 INFO L87 Difference]: Start difference. First operand 485 states and 1066 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:33,030 INFO L93 Difference]: Finished difference Result 685 states and 1451 transitions. [2021-07-13 20:22:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:22:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:33,032 INFO L225 Difference]: With dead ends: 685 [2021-07-13 20:22:33,032 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 20:22:33,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:22:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 20:22:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 525. [2021-07-13 20:22:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.1946564885496183) internal successors, (1150), 524 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1150 transitions. [2021-07-13 20:22:33,038 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1150 transitions. Word has length 29 [2021-07-13 20:22:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:33,039 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1150 transitions. [2021-07-13 20:22:33,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1150 transitions. [2021-07-13 20:22:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:33,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:33,039 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:33,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:33,240 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1499797836, now seen corresponding path program 49 times [2021-07-13 20:22:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:33,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303449642] [2021-07-13 20:22:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:22:33,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:33,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303449642] [2021-07-13 20:22:33,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303449642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:33,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304707550] [2021-07-13 20:22:33,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:33,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:33,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304707550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:33,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:33,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:33,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812120919] [2021-07-13 20:22:33,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:33,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:33,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:33,885 INFO L87 Difference]: Start difference. First operand 525 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:35,066 INFO L93 Difference]: Finished difference Result 696 states and 1471 transitions. [2021-07-13 20:22:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:22:35,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:35,068 INFO L225 Difference]: With dead ends: 696 [2021-07-13 20:22:35,068 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:22:35,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1340.3ms TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:22:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:22:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 528. [2021-07-13 20:22:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.1916508538899433) internal successors, (1155), 527 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1155 transitions. [2021-07-13 20:22:35,078 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1155 transitions. Word has length 29 [2021-07-13 20:22:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:35,078 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1155 transitions. [2021-07-13 20:22:35,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1155 transitions. [2021-07-13 20:22:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:35,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:35,079 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:35,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:35,295 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:35,295 INFO L82 PathProgramCache]: Analyzing trace with hash -715875632, now seen corresponding path program 50 times [2021-07-13 20:22:35,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:35,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716823049] [2021-07-13 20:22:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:22:35,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:35,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716823049] [2021-07-13 20:22:35,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716823049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:35,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66325829] [2021-07-13 20:22:35,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:35,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:35,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:35,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:35,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66325829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:35,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:35,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:35,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833295776] [2021-07-13 20:22:35,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:35,982 INFO L87 Difference]: Start difference. First operand 528 states and 1155 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:37,284 INFO L93 Difference]: Finished difference Result 739 states and 1557 transitions. [2021-07-13 20:22:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:22:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:37,286 INFO L225 Difference]: With dead ends: 739 [2021-07-13 20:22:37,286 INFO L226 Difference]: Without dead ends: 713 [2021-07-13 20:22:37,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1356.1ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:22:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-13 20:22:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 511. [2021-07-13 20:22:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.1921568627450982) internal successors, (1118), 510 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1118 transitions. [2021-07-13 20:22:37,294 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1118 transitions. Word has length 29 [2021-07-13 20:22:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:37,294 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1118 transitions. [2021-07-13 20:22:37,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1118 transitions. [2021-07-13 20:22:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:37,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:37,295 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:37,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:37,509 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash -353926280, now seen corresponding path program 51 times [2021-07-13 20:22:37,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:37,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306779920] [2021-07-13 20:22:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:37,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:37,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306779920] [2021-07-13 20:22:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306779920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:37,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171894853] [2021-07-13 20:22:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:37,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:22:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:22:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:38,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171894853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:38,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:38,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:22:38,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944759657] [2021-07-13 20:22:38,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:22:38,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:38,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:22:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:22:38,254 INFO L87 Difference]: Start difference. First operand 511 states and 1118 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:39,121 INFO L93 Difference]: Finished difference Result 724 states and 1531 transitions. [2021-07-13 20:22:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:22:39,122 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:39,123 INFO L225 Difference]: With dead ends: 724 [2021-07-13 20:22:39,123 INFO L226 Difference]: Without dead ends: 647 [2021-07-13 20:22:39,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1110.0ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:22:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-07-13 20:22:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 527. [2021-07-13 20:22:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.1863117870722433) internal successors, (1150), 526 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1150 transitions. [2021-07-13 20:22:39,130 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1150 transitions. Word has length 29 [2021-07-13 20:22:39,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:39,130 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1150 transitions. [2021-07-13 20:22:39,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1150 transitions. [2021-07-13 20:22:39,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:39,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:39,131 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:39,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:39,332 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2048232520, now seen corresponding path program 52 times [2021-07-13 20:22:39,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:39,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276768133] [2021-07-13 20:22:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:39,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:39,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276768133] [2021-07-13 20:22:39,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276768133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:39,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358011430] [2021-07-13 20:22:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:22:39,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:39,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:39,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358011430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:39,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:39,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313956160] [2021-07-13 20:22:39,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:39,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:39,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:39,943 INFO L87 Difference]: Start difference. First operand 527 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:40,886 INFO L93 Difference]: Finished difference Result 754 states and 1604 transitions. [2021-07-13 20:22:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:22:40,887 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:40,888 INFO L225 Difference]: With dead ends: 754 [2021-07-13 20:22:40,888 INFO L226 Difference]: Without dead ends: 702 [2021-07-13 20:22:40,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1079.7ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:22:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-07-13 20:22:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 611. [2021-07-13 20:22:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.181967213114754) internal successors, (1331), 610 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1331 transitions. [2021-07-13 20:22:40,895 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1331 transitions. Word has length 29 [2021-07-13 20:22:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:40,895 INFO L482 AbstractCegarLoop]: Abstraction has 611 states and 1331 transitions. [2021-07-13 20:22:40,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1331 transitions. [2021-07-13 20:22:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:40,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:40,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:41,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-13 20:22:41,099 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash -14984508, now seen corresponding path program 53 times [2021-07-13 20:22:41,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:41,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57581830] [2021-07-13 20:22:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:41,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:41,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57581830] [2021-07-13 20:22:41,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57581830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:41,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225802397] [2021-07-13 20:22:41,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:41,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:41,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:22:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:41,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225802397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:41,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:41,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:22:41,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413742613] [2021-07-13 20:22:41,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:22:41,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:22:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:22:41,798 INFO L87 Difference]: Start difference. First operand 611 states and 1331 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2021-07-13 20:22:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:43,368 INFO L93 Difference]: Finished difference Result 840 states and 1779 transitions. [2021-07-13 20:22:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:22:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:43,372 INFO L225 Difference]: With dead ends: 840 [2021-07-13 20:22:43,372 INFO L226 Difference]: Without dead ends: 818 [2021-07-13 20:22:43,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1779.2ms TimeCoverageRelationStatistics Valid=598, Invalid=4232, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:22:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-07-13 20:22:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 654. [2021-07-13 20:22:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.1852986217457886) internal successors, (1427), 653 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1427 transitions. [2021-07-13 20:22:43,380 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1427 transitions. Word has length 29 [2021-07-13 20:22:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:43,380 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1427 transitions. [2021-07-13 20:22:43,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2021-07-13 20:22:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1427 transitions. [2021-07-13 20:22:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:43,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:43,381 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:43,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:43,582 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2064309320, now seen corresponding path program 54 times [2021-07-13 20:22:43,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:43,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191383737] [2021-07-13 20:22:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:43,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:43,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191383737] [2021-07-13 20:22:43,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191383737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:43,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508887282] [2021-07-13 20:22:43,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:43,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:43,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:43,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:44,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508887282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:44,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:44,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:44,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425736215] [2021-07-13 20:22:44,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:44,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:44,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:44,180 INFO L87 Difference]: Start difference. First operand 654 states and 1427 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:45,828 INFO L93 Difference]: Finished difference Result 877 states and 1853 transitions. [2021-07-13 20:22:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:22:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:45,829 INFO L225 Difference]: With dead ends: 877 [2021-07-13 20:22:45,829 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 20:22:45,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1586.6ms TimeCoverageRelationStatistics Valid=841, Invalid=4859, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:22:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 20:22:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 593. [2021-07-13 20:22:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.1655405405405403) internal successors, (1282), 592 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1282 transitions. [2021-07-13 20:22:45,837 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1282 transitions. Word has length 29 [2021-07-13 20:22:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:45,837 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1282 transitions. [2021-07-13 20:22:45,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1282 transitions. [2021-07-13 20:22:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:45,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:45,853 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:46,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-07-13 20:22:46,054 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1014858316, now seen corresponding path program 55 times [2021-07-13 20:22:46,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:46,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675471939] [2021-07-13 20:22:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:46,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675471939] [2021-07-13 20:22:46,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675471939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015770258] [2021-07-13 20:22:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:46,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015770258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:46,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:46,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:22:46,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021460117] [2021-07-13 20:22:46,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:46,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:46,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:46,752 INFO L87 Difference]: Start difference. First operand 593 states and 1282 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:47,563 INFO L93 Difference]: Finished difference Result 753 states and 1591 transitions. [2021-07-13 20:22:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:22:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:47,565 INFO L225 Difference]: With dead ends: 753 [2021-07-13 20:22:47,565 INFO L226 Difference]: Without dead ends: 731 [2021-07-13 20:22:47,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1020.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:22:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-13 20:22:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 618. [2021-07-13 20:22:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.1620745542949757) internal successors, (1334), 617 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1334 transitions. [2021-07-13 20:22:47,587 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1334 transitions. Word has length 29 [2021-07-13 20:22:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:47,587 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1334 transitions. [2021-07-13 20:22:47,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1334 transitions. [2021-07-13 20:22:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:47,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:47,588 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:47,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-13 20:22:47,801 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1064435512, now seen corresponding path program 56 times [2021-07-13 20:22:47,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:47,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882423453] [2021-07-13 20:22:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:48,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882423453] [2021-07-13 20:22:48,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882423453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116034101] [2021-07-13 20:22:48,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:22:48,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:48,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:48,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116034101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:48,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:22:48,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570250540] [2021-07-13 20:22:48,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:48,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:48,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:48,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:48,499 INFO L87 Difference]: Start difference. First operand 618 states and 1334 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:49,432 INFO L93 Difference]: Finished difference Result 872 states and 1845 transitions. [2021-07-13 20:22:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:22:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:49,434 INFO L225 Difference]: With dead ends: 872 [2021-07-13 20:22:49,434 INFO L226 Difference]: Without dead ends: 839 [2021-07-13 20:22:49,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:22:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-07-13 20:22:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 617. [2021-07-13 20:22:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.1623376623376624) internal successors, (1332), 616 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1332 transitions. [2021-07-13 20:22:49,441 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1332 transitions. Word has length 29 [2021-07-13 20:22:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:49,441 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1332 transitions. [2021-07-13 20:22:49,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1332 transitions. [2021-07-13 20:22:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:49,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:49,442 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:49,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:49,657 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:49,657 INFO L82 PathProgramCache]: Analyzing trace with hash -11275644, now seen corresponding path program 57 times [2021-07-13 20:22:49,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:49,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153227383] [2021-07-13 20:22:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:49,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:49,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153227383] [2021-07-13 20:22:49,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153227383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:49,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954805697] [2021-07-13 20:22:49,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:49,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:22:49,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:49,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:49,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954805697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:50,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:50,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:22:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870687151] [2021-07-13 20:22:50,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:50,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:50,279 INFO L87 Difference]: Start difference. First operand 617 states and 1332 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:51,070 INFO L93 Difference]: Finished difference Result 1003 states and 2135 transitions. [2021-07-13 20:22:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:22:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:51,072 INFO L225 Difference]: With dead ends: 1003 [2021-07-13 20:22:51,072 INFO L226 Difference]: Without dead ends: 970 [2021-07-13 20:22:51,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 936.1ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:22:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-07-13 20:22:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 603. [2021-07-13 20:22:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.1627906976744184) internal successors, (1302), 602 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1302 transitions. [2021-07-13 20:22:51,085 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1302 transitions. Word has length 29 [2021-07-13 20:22:51,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:51,085 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1302 transitions. [2021-07-13 20:22:51,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1302 transitions. [2021-07-13 20:22:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:51,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:51,086 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:51,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:51,301 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -992806576, now seen corresponding path program 58 times [2021-07-13 20:22:51,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:51,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162456146] [2021-07-13 20:22:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:22:51,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162456146] [2021-07-13 20:22:51,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162456146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963362804] [2021-07-13 20:22:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:51,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:51,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:51,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:51,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963362804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:51,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:51,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:51,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214401185] [2021-07-13 20:22:51,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:51,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:51,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:51,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:51,932 INFO L87 Difference]: Start difference. First operand 603 states and 1302 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:52,807 INFO L93 Difference]: Finished difference Result 675 states and 1425 transitions. [2021-07-13 20:22:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:22:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:52,808 INFO L225 Difference]: With dead ends: 675 [2021-07-13 20:22:52,808 INFO L226 Difference]: Without dead ends: 607 [2021-07-13 20:22:52,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1033.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:22:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-13 20:22:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 576. [2021-07-13 20:22:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.017391304347826) internal successors, (1160), 575 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1160 transitions. [2021-07-13 20:22:52,814 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1160 transitions. Word has length 29 [2021-07-13 20:22:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:52,814 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1160 transitions. [2021-07-13 20:22:52,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1160 transitions. [2021-07-13 20:22:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:52,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:52,815 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:53,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:53,031 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:53,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1189375948, now seen corresponding path program 59 times [2021-07-13 20:22:53,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:53,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551192635] [2021-07-13 20:22:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:22:53,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:53,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551192635] [2021-07-13 20:22:53,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551192635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:53,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621029709] [2021-07-13 20:22:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:53,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:53,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:53,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:53,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621029709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:53,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:53,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:53,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75123836] [2021-07-13 20:22:53,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:53,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:53,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:53,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:53,652 INFO L87 Difference]: Start difference. First operand 576 states and 1160 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:54,900 INFO L93 Difference]: Finished difference Result 703 states and 1407 transitions. [2021-07-13 20:22:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:22:54,900 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:54,901 INFO L225 Difference]: With dead ends: 703 [2021-07-13 20:22:54,901 INFO L226 Difference]: Without dead ends: 679 [2021-07-13 20:22:54,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1409.1ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:22:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-07-13 20:22:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 583. [2021-07-13 20:22:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.0051546391752577) internal successors, (1167), 582 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1167 transitions. [2021-07-13 20:22:54,907 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1167 transitions. Word has length 29 [2021-07-13 20:22:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:54,907 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1167 transitions. [2021-07-13 20:22:54,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1167 transitions. [2021-07-13 20:22:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:54,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:54,908 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:55,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-13 20:22:55,121 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:55,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1026297520, now seen corresponding path program 60 times [2021-07-13 20:22:55,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:55,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945162658] [2021-07-13 20:22:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:22:55,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:55,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945162658] [2021-07-13 20:22:55,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945162658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:55,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876168986] [2021-07-13 20:22:55,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:55,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:55,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:55,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:22:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:55,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876168986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:55,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:55,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-07-13 20:22:55,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043219620] [2021-07-13 20:22:55,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:22:55,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:22:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:55,589 INFO L87 Difference]: Start difference. First operand 583 states and 1167 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:56,658 INFO L93 Difference]: Finished difference Result 756 states and 1505 transitions. [2021-07-13 20:22:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:22:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:56,660 INFO L225 Difference]: With dead ends: 756 [2021-07-13 20:22:56,660 INFO L226 Difference]: Without dead ends: 730 [2021-07-13 20:22:56,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1090.0ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:22:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-07-13 20:22:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 457. [2021-07-13 20:22:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.9956140350877194) internal successors, (910), 456 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) [2021-07-13 20:22:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 910 transitions. [2021-07-13 20:22:56,666 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 910 transitions. Word has length 29 [2021-07-13 20:22:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:56,666 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 910 transitions. [2021-07-13 20:22:56,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 910 transitions. [2021-07-13 20:22:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:56,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:56,667 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:56,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-13 20:22:56,881 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -664348168, now seen corresponding path program 61 times [2021-07-13 20:22:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:56,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595352418] [2021-07-13 20:22:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595352418] [2021-07-13 20:22:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595352418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579129135] [2021-07-13 20:22:57,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:22:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:57,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579129135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:57,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:57,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:22:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395825589] [2021-07-13 20:22:57,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:57,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:57,447 INFO L87 Difference]: Start difference. First operand 457 states and 910 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:57,970 INFO L93 Difference]: Finished difference Result 708 states and 1404 transitions. [2021-07-13 20:22:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:22:57,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:57,972 INFO L225 Difference]: With dead ends: 708 [2021-07-13 20:22:57,972 INFO L226 Difference]: Without dead ends: 683 [2021-07-13 20:22:57,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:22:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-13 20:22:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 517. [2021-07-13 20:22:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.996124031007752) internal successors, (1030), 516 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1030 transitions. [2021-07-13 20:22:57,977 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1030 transitions. Word has length 29 [2021-07-13 20:22:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:57,977 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1030 transitions. [2021-07-13 20:22:57,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1030 transitions. [2021-07-13 20:22:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:57,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:57,979 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:58,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-13 20:22:58,195 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 211415604, now seen corresponding path program 62 times [2021-07-13 20:22:58,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:58,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143240733] [2021-07-13 20:22:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:58,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:58,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143240733] [2021-07-13 20:22:58,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143240733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:58,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604807038] [2021-07-13 20:22:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:58,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:22:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:58,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604807038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:58,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:58,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-07-13 20:22:58,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331547041] [2021-07-13 20:22:58,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:22:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:22:58,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:58,784 INFO L87 Difference]: Start difference. First operand 517 states and 1030 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:59,769 INFO L93 Difference]: Finished difference Result 722 states and 1434 transitions. [2021-07-13 20:22:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:22:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:22:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:59,770 INFO L225 Difference]: With dead ends: 722 [2021-07-13 20:22:59,770 INFO L226 Difference]: Without dead ends: 693 [2021-07-13 20:22:59,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1160.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:22:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-07-13 20:22:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 303. [2021-07-13 20:22:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 302 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 598 transitions. [2021-07-13 20:22:59,774 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 598 transitions. Word has length 29 [2021-07-13 20:22:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:59,774 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 598 transitions. [2021-07-13 20:22:59,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 598 transitions. [2021-07-13 20:22:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:22:59,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:59,775 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:59,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:59,980 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash -758525832, now seen corresponding path program 63 times [2021-07-13 20:22:59,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:59,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870181896] [2021-07-13 20:22:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:00,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:00,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870181896] [2021-07-13 20:23:00,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870181896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:00,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744296892] [2021-07-13 20:23:00,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:00,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:23:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:23:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:00,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744296892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:00,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:00,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-07-13 20:23:00,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460913930] [2021-07-13 20:23:00,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:23:00,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:23:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:23:00,634 INFO L87 Difference]: Start difference. First operand 303 states and 598 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:01,664 INFO L93 Difference]: Finished difference Result 368 states and 721 transitions. [2021-07-13 20:23:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:23:01,677 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:23:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:01,677 INFO L225 Difference]: With dead ends: 368 [2021-07-13 20:23:01,677 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 20:23:01,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1176.8ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:23:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 20:23:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 20:23:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 20:23:01,681 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-07-13 20:23:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:01,681 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 20:23:01,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 20:23:01,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:23:01,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-13 20:23:01,884 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:23:01,886 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:23:01 BasicIcfg [2021-07-13 20:23:01,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:23:01,886 INFO L168 Benchmark]: Toolchain (without parser) took 112056.98 ms. Allocated memory was 191.9 MB in the beginning and 468.7 MB in the end (delta: 276.8 MB). Free memory was 172.4 MB in the beginning and 246.6 MB in the end (delta: -74.3 MB). Peak memory consumption was 204.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:23:01,886 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:23:01,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.17 ms. Allocated memory is still 191.9 MB. Free memory was 172.2 MB in the beginning and 170.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:23:01,886 INFO L168 Benchmark]: Boogie Preprocessor took 11.98 ms. Allocated memory is still 191.9 MB. Free memory was 170.7 MB in the beginning and 169.9 MB in the end (delta: 841.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:23:01,886 INFO L168 Benchmark]: RCFGBuilder took 228.54 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 157.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:23:01,886 INFO L168 Benchmark]: TraceAbstraction took 111789.49 ms. Allocated memory was 191.9 MB in the beginning and 468.7 MB in the end (delta: 276.8 MB). Free memory was 157.5 MB in the beginning and 246.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 188.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:23:01,887 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 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.17 ms. Allocated memory is still 191.9 MB. Free memory was 172.2 MB in the beginning and 170.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.98 ms. Allocated memory is still 191.9 MB. Free memory was 170.7 MB in the beginning and 169.9 MB in the end (delta: 841.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 228.54 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 157.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 111789.49 ms. Allocated memory was 191.9 MB in the beginning and 468.7 MB in the end (delta: 276.8 MB). Free memory was 157.5 MB in the beginning and 246.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 188.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 111695.1ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 64.2ms, AutomataDifference: 61500.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1312 SDtfs, 8393 SDslu, 14376 SDs, 0 SdLazy, 46893 SolverSat, 4165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17860.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4260 GetRequests, 814 SyntacticMatches, 135 SemanticMatches, 3311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57379 ImplicationChecksByTransitivity, 66341.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=55, InterpolantAutomatonStates: 2580, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 425.3ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10402 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 187.3ms SsaConstructionTime, 539.6ms SatisfiabilityAnalysisTime, 34072.5ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55612 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...