/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:01:32,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:01:32,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:01:32,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:01:32,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:01:32,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:01:32,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:01:32,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:01:32,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:01:32,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:01:32,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:01:32,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:01:32,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:01:32,590 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:01:32,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:01:32,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:01:32,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:01:32,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:01:32,592 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:01:32,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:01:32,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:01:32,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:01:32,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:01:32,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:01:32,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:01:32,769 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:01:32,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-03-19 23:01:32,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5b4b5f09/eedfb698968b48d6b219c8b21fafcd9b/FLAGd771a7cab [2022-03-19 23:01:33,131 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:01:33,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-03-19 23:01:33,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5b4b5f09/eedfb698968b48d6b219c8b21fafcd9b/FLAGd771a7cab [2022-03-19 23:01:33,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5b4b5f09/eedfb698968b48d6b219c8b21fafcd9b [2022-03-19 23:01:33,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:01:33,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:01:33,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:01:33,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:01:33,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:01:33,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba397ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33, skipping insertion in model container [2022-03-19 23:01:33,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:01:33,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:01:33,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-03-19 23:01:33,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:01:33,295 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:01:33,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-03-19 23:01:33,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:01:33,316 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:01:33,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33 WrapperNode [2022-03-19 23:01:33,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:01:33,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:01:33,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:01:33,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:01:33,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:01:33,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:01:33,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:01:33,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:01:33,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (1/1) ... [2022-03-19 23:01:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:01:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:33,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 23:01:33,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 23:01:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:01:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:01:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:01:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:01:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:01:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:01:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:01:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:01:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:01:33,436 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:01:33,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:01:33,522 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:01:33,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:01:33,525 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:01:33,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:01:33 BoogieIcfgContainer [2022-03-19 23:01:33,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:01:33,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:01:33,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:01:33,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:01:33,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:01:33" (1/3) ... [2022-03-19 23:01:33,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f04a695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:01:33, skipping insertion in model container [2022-03-19 23:01:33,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:01:33" (2/3) ... [2022-03-19 23:01:33,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f04a695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:01:33, skipping insertion in model container [2022-03-19 23:01:33,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:01:33" (3/3) ... [2022-03-19 23:01:33,532 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2022-03-19 23:01:33,535 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:01:33,535 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:01:33,574 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:01:33,580 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 23:01:33,580 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:01:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:01:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:01:33,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:33,605 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:33,605 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-03-19 23:01:33,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623827281] [2022-03-19 23:01:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:33,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:33,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:33,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623827281] [2022-03-19 23:01:33,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623827281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:33,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:33,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:01:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373554359] [2022-03-19 23:01:33,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:33,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:01:33,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:33,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:01:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:01:33,806 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:33,832 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-19 23:01:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:01:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 23:01:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:33,841 INFO L225 Difference]: With dead ends: 34 [2022-03-19 23:01:33,841 INFO L226 Difference]: Without dead ends: 14 [2022-03-19 23:01:33,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:01:33,846 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:33,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-19 23:01:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-19 23:01:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-03-19 23:01:33,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-03-19 23:01:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:33,883 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-03-19 23:01:33,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-03-19 23:01:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:01:33,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:33,884 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:33,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:01:33,885 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:33,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-03-19 23:01:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:33,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945257754] [2022-03-19 23:01:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:33,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:33,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:01:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:33,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945257754] [2022-03-19 23:01:33,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945257754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:33,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:33,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:01:33,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849794644] [2022-03-19 23:01:33,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:33,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:01:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:01:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:01:33,937 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:33,960 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-03-19 23:01:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:01:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 23:01:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:33,961 INFO L225 Difference]: With dead ends: 24 [2022-03-19 23:01:33,961 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 23:01:33,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:01:33,962 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:33,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 23:01:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 23:01:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-19 23:01:33,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-03-19 23:01:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:33,966 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-19 23:01:33,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-19 23:01:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 23:01:33,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:33,967 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:33,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:01:33,968 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-03-19 23:01:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:33,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033384928] [2022-03-19 23:01:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033384928] [2022-03-19 23:01:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033384928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:01:34,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:01:34,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:01:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377002136] [2022-03-19 23:01:34,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:01:34,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:01:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:34,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:01:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:01:34,011 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:34,037 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-19 23:01:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:01:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 23:01:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:34,038 INFO L225 Difference]: With dead ends: 22 [2022-03-19 23:01:34,038 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 23:01:34,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:01:34,039 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:34,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 23:01:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 23:01:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 23:01:34,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-03-19 23:01:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:34,042 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 23:01:34,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 23:01:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 23:01:34,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:34,043 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:34,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:01:34,043 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 1 times [2022-03-19 23:01:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252746125] [2022-03-19 23:01:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252746125] [2022-03-19 23:01:34,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252746125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172457912] [2022-03-19 23:01:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:34,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:34,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:34,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:01:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:01:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:34,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:01:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172457912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:34,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:34,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:01:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82444477] [2022-03-19 23:01:34,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:34,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:01:34,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:01:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:01:34,254 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:34,336 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-03-19 23:01:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:01:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 23:01:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:34,339 INFO L225 Difference]: With dead ends: 31 [2022-03-19 23:01:34,339 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 23:01:34,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:01:34,346 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:34,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 23:01:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-19 23:01:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-19 23:01:34,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-03-19 23:01:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:34,350 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-19 23:01:34,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-19 23:01:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:01:34,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:34,351 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:34,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 23:01:34,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:34,567 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 694051964, now seen corresponding path program 1 times [2022-03-19 23:01:34,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:34,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66527651] [2022-03-19 23:01:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:34,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:34,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66527651] [2022-03-19 23:01:34,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66527651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946877881] [2022-03-19 23:01:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:34,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:34,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:34,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:34,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:01:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:01:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:34,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:34,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946877881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:34,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:01:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192952561] [2022-03-19 23:01:34,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:34,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:01:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:01:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:01:34,773 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:34,856 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-19 23:01:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:01:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 23:01:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:34,857 INFO L225 Difference]: With dead ends: 42 [2022-03-19 23:01:34,857 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 23:01:34,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:01:34,858 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:34,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 23:01:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 23:01:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-19 23:01:34,862 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-19 23:01:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:34,862 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-19 23:01:34,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-19 23:01:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:01:34,863 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:34,863 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:34,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:35,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:35,079 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1530073712, now seen corresponding path program 2 times [2022-03-19 23:01:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765394242] [2022-03-19 23:01:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:35,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:35,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765394242] [2022-03-19 23:01:35,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765394242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:35,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633523836] [2022-03-19 23:01:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:01:35,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:35,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:35,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:35,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:01:35,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:01:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 23:01:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:35,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633523836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:35,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:35,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 23:01:35,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158473885] [2022-03-19 23:01:35,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:35,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:01:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:01:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:01:35,410 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:35,555 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-03-19 23:01:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:01:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 23:01:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:35,559 INFO L225 Difference]: With dead ends: 58 [2022-03-19 23:01:35,559 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 23:01:35,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:01:35,561 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:35,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:01:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 23:01:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 23:01:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-19 23:01:35,581 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-03-19 23:01:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:35,581 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-19 23:01:35,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-19 23:01:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 23:01:35,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:35,586 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:35,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:35,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:35,803 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1073294760, now seen corresponding path program 3 times [2022-03-19 23:01:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472860943] [2022-03-19 23:01:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:01:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472860943] [2022-03-19 23:01:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472860943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839622338] [2022-03-19 23:01:35,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:01:35,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:35,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:35,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:01:35,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 23:01:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:35,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:01:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:01:36,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 23:01:36,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839622338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:36,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:36,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-19 23:01:36,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546641542] [2022-03-19 23:01:36,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:36,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:01:36,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:01:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:01:36,225 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:36,562 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-03-19 23:01:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 23:01:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 23:01:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:36,563 INFO L225 Difference]: With dead ends: 70 [2022-03-19 23:01:36,563 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 23:01:36,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 23:01:36,565 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:36,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 37 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 23:01:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-03-19 23:01:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-03-19 23:01:36,569 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-03-19 23:01:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:36,569 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-03-19 23:01:36,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-03-19 23:01:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 23:01:36,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:36,570 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:36,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:36,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:36,780 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1375897099, now seen corresponding path program 4 times [2022-03-19 23:01:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839007282] [2022-03-19 23:01:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:36,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839007282] [2022-03-19 23:01:36,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839007282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462856081] [2022-03-19 23:01:36,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:01:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:36,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:36,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:36,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:01:36,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:01:36,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 23:01:36,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:37,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:37,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462856081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:37,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:37,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 23:01:37,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017138357] [2022-03-19 23:01:37,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:37,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 23:01:37,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:37,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 23:01:37,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 23:01:37,445 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:37,973 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-03-19 23:01:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 23:01:37,973 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-19 23:01:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:37,974 INFO L225 Difference]: With dead ends: 102 [2022-03-19 23:01:37,974 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 23:01:37,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 23:01:37,977 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:37,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 23:01:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-19 23:01:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-19 23:01:37,986 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 51 [2022-03-19 23:01:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:37,986 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-19 23:01:37,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-19 23:01:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 23:01:37,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:37,988 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:38,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 23:01:38,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:38,204 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1862219422, now seen corresponding path program 5 times [2022-03-19 23:01:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:38,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205348773] [2022-03-19 23:01:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205348773] [2022-03-19 23:01:38,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205348773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646789809] [2022-03-19 23:01:38,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:01:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:38,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:38,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:01:38,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-03-19 23:01:38,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:38,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 23:01:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:38,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:39,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646789809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:39,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:39,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 23:01:39,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405211698] [2022-03-19 23:01:39,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:39,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 23:01:39,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 23:01:39,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 23:01:39,777 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:41,385 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2022-03-19 23:01:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 23:01:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-19 23:01:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:41,386 INFO L225 Difference]: With dead ends: 170 [2022-03-19 23:01:41,386 INFO L226 Difference]: Without dead ends: 154 [2022-03-19 23:01:41,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 23:01:41,389 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:41,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 46 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:01:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-19 23:01:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-19 23:01:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-03-19 23:01:41,400 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 85 [2022-03-19 23:01:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:41,400 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-03-19 23:01:41,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-03-19 23:01:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 23:01:41,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:41,402 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:41,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:41,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:41,619 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1656756612, now seen corresponding path program 6 times [2022-03-19 23:01:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:41,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557907250] [2022-03-19 23:01:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:43,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:01:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557907250] [2022-03-19 23:01:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557907250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110582601] [2022-03-19 23:01:43,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:01:43,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:43,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:01:43,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 23:01:43,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:01:43,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:01:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-19 23:01:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-19 23:01:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110582601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:44,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 8, 8] total 82 [2022-03-19 23:01:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928385978] [2022-03-19 23:01:44,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:44,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 23:01:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 23:01:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2438, Invalid=4204, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 23:01:44,201 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:46,418 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2022-03-19 23:01:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 23:01:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-19 23:01:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:46,419 INFO L225 Difference]: With dead ends: 185 [2022-03-19 23:01:46,419 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 23:01:46,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8648, Invalid=17112, Unknown=0, NotChecked=0, Total=25760 [2022-03-19 23:01:46,424 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:46,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 53 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:01:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 23:01:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2022-03-19 23:01:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-03-19 23:01:46,433 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 153 [2022-03-19 23:01:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:46,434 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-03-19 23:01:46,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-03-19 23:01:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-19 23:01:46,439 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:46,439 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:46,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 23:01:46,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:46,661 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2143818698, now seen corresponding path program 7 times [2022-03-19 23:01:46,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:46,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72081307] [2022-03-19 23:01:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:46,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:47,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:01:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:01:47,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:01:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72081307] [2022-03-19 23:01:47,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72081307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:01:47,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46173317] [2022-03-19 23:01:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:01:47,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:01:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:01:47,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:01:47,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:01:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:01:47,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 23:01:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:01:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:01:48,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:01:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:01:51,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46173317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:01:51,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:01:51,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-19 23:01:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304317779] [2022-03-19 23:01:51,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:01:51,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 23:01:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:01:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 23:01:51,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 23:01:51,598 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:01:57,029 INFO L93 Difference]: Finished difference Result 324 states and 399 transitions. [2022-03-19 23:01:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-19 23:01:57,029 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-03-19 23:01:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:01:57,031 INFO L225 Difference]: With dead ends: 324 [2022-03-19 23:01:57,031 INFO L226 Difference]: Without dead ends: 301 [2022-03-19 23:01:57,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 23:01:57,035 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:01:57,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 56 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:01:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-03-19 23:01:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-03-19 23:01:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0135135135135136) internal successors, (300), 296 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2022-03-19 23:01:57,056 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 162 [2022-03-19 23:01:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:01:57,056 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2022-03-19 23:01:57,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:01:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2022-03-19 23:01:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-03-19 23:01:57,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:01:57,059 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:01:57,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:01:57,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 23:01:57,260 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:01:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:01:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 863475417, now seen corresponding path program 8 times [2022-03-19 23:01:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:01:57,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857675245] [2022-03-19 23:01:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:01:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:01:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:02,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:02:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:02:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:02:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857675245] [2022-03-19 23:02:02,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857675245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:02:02,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841624382] [2022-03-19 23:02:02,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:02:02,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:02:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:02:02,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:02:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:02:02,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:02:02,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:02:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-19 23:02:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:02:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:02:03,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:02:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:02:17,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841624382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:02:17,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:02:17,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-19 23:02:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575290452] [2022-03-19 23:02:17,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:02:17,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-19 23:02:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:02:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-19 23:02:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-19 23:02:17,894 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:02:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:02:33,417 INFO L93 Difference]: Finished difference Result 600 states and 744 transitions. [2022-03-19 23:02:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-19 23:02:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-03-19 23:02:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:02:33,428 INFO L225 Difference]: With dead ends: 600 [2022-03-19 23:02:33,428 INFO L226 Difference]: Without dead ends: 577 [2022-03-19 23:02:33,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-19 23:02:33,440 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:02:33,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 71 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:02:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-03-19 23:02:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-03-19 23:02:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 572 states have (on average 1.006993006993007) internal successors, (576), 572 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:02:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 580 transitions. [2022-03-19 23:02:33,500 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 580 transitions. Word has length 300 [2022-03-19 23:02:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:02:33,500 INFO L478 AbstractCegarLoop]: Abstraction has 577 states and 580 transitions. [2022-03-19 23:02:33,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:02:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 580 transitions. [2022-03-19 23:02:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-03-19 23:02:33,507 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:02:33,507 INFO L499 BasicCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:02:33,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 23:02:33,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:02:33,729 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:02:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:02:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash 300443831, now seen corresponding path program 9 times [2022-03-19 23:02:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:02:33,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844639640] [2022-03-19 23:02:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:02:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:02:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:49,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:02:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:02:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 23:02:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:02:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844639640] [2022-03-19 23:02:49,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844639640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:02:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570578984] [2022-03-19 23:02:49,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:02:49,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:02:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:02:49,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:02:49,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:02:49,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:02:49,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:02:49,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:02:49,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:02:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2022-03-19 23:02:50,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:02:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2022-03-19 23:02:51,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570578984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:02:51,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:02:51,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 5, 5] total 284 [2022-03-19 23:02:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401288160] [2022-03-19 23:02:51,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:02:51,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 284 states [2022-03-19 23:02:51,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:02:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 284 interpolants. [2022-03-19 23:02:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39905, Invalid=40467, Unknown=0, NotChecked=0, Total=80372 [2022-03-19 23:02:51,431 INFO L87 Difference]: Start difference. First operand 577 states and 580 transitions. Second operand has 284 states, 284 states have (on average 2.0316901408450705) internal successors, (577), 283 states have internal predecessors, (577), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:03:10,528 INFO L93 Difference]: Finished difference Result 610 states and 625 transitions. [2022-03-19 23:03:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2022-03-19 23:03:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 284 states, 284 states have (on average 2.0316901408450705) internal successors, (577), 283 states have internal predecessors, (577), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 576 [2022-03-19 23:03:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:03:10,531 INFO L225 Difference]: With dead ends: 610 [2022-03-19 23:03:10,532 INFO L226 Difference]: Without dead ends: 587 [2022-03-19 23:03:10,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1716 GetRequests, 1153 SyntacticMatches, 0 SemanticMatches, 563 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39615 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=119709, Invalid=198951, Unknown=0, NotChecked=0, Total=318660 [2022-03-19 23:03:10,542 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 848 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 1143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1143 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:03:10,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 35 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1143 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 23:03:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-19 23:03:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-03-19 23:03:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 582 states have (on average 1.013745704467354) internal successors, (590), 582 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 594 transitions. [2022-03-19 23:03:10,568 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 594 transitions. Word has length 576 [2022-03-19 23:03:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:03:10,568 INFO L478 AbstractCegarLoop]: Abstraction has 587 states and 594 transitions. [2022-03-19 23:03:10,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 284 states, 284 states have (on average 2.0316901408450705) internal successors, (577), 283 states have internal predecessors, (577), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:03:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 594 transitions. [2022-03-19 23:03:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-03-19 23:03:10,575 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:03:10,575 INFO L499 BasicCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:03:10,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 23:03:10,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:03:10,791 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:03:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:03:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash 214943182, now seen corresponding path program 10 times [2022-03-19 23:03:10,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:03:10,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009080105] [2022-03-19 23:03:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:03:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:03:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:03:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:03:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 23:03:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:03:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009080105] [2022-03-19 23:03:28,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009080105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:03:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256491492] [2022-03-19 23:03:28,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:03:28,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:03:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:03:28,538 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:03:28,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:03:28,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:03:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:03:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-19 23:03:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:03:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 23:03:29,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:04:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 23:04:10,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256491492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:04:10,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:04:10,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-19 23:04:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239780560] [2022-03-19 23:04:10,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:04:10,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-19 23:04:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:04:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-19 23:04:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-19 23:04:10,827 INFO L87 Difference]: Start difference. First operand 587 states and 594 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:05:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:05:22,650 INFO L93 Difference]: Finished difference Result 1172 states and 1463 transitions. [2022-03-19 23:05:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-19 23:05:22,651 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2022-03-19 23:05:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:05:22,654 INFO L225 Difference]: With dead ends: 1172 [2022-03-19 23:05:22,654 INFO L226 Difference]: Without dead ends: 1141 [2022-03-19 23:05:22,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2003 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 120.6s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-19 23:05:22,713 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:05:22,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 46 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:05:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-03-19 23:05:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1141. [2022-03-19 23:05:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1136 states have (on average 1.0070422535211268) internal successors, (1144), 1136 states have internal predecessors, (1144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:05:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1148 transitions. [2022-03-19 23:05:22,764 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1148 transitions. Word has length 586 [2022-03-19 23:05:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:05:22,765 INFO L478 AbstractCegarLoop]: Abstraction has 1141 states and 1148 transitions. [2022-03-19 23:05:22,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:05:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1148 transitions. [2022-03-19 23:05:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2022-03-19 23:05:22,774 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:05:22,774 INFO L499 BasicCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:05:22,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 23:05:22,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:05:22,981 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:05:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:05:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash -344289715, now seen corresponding path program 11 times [2022-03-19 23:05:22,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:05:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660938165] [2022-03-19 23:05:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:05:22,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:05:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:40,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:06:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:06:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 23:06:40,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:06:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660938165] [2022-03-19 23:06:40,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660938165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:06:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915512323] [2022-03-19 23:06:40,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:06:40,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:06:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:06:40,643 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:06:40,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:06:42,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 559 check-sat command(s) [2022-03-19 23:06:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:06:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-19 23:06:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:06:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 23:06:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:09:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 23:09:40,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915512323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:09:40,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:09:40,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-19 23:09:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003958758] [2022-03-19 23:09:40,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:09:40,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-19 23:09:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:09:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-19 23:09:40,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-19 23:09:40,706 INFO L87 Difference]: Start difference. First operand 1141 states and 1148 transitions. Second operand has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)