/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/array-cav19/array_tripl_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 00:36:18,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 00:36:18,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 00:36:18,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 00:36:18,789 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 [2022-01-31 00:36:18,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 00:36:18,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 00:36:18,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 00:36:18,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 00:36:18,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 00:36:18,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 00:36:18,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 00:36:18,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 00:36:18,820 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 00:36:18,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 00:36:18,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 00:36:18,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 00:36:18,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 00:36:18,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 00:36:18,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 00:36:18,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 00:36:18,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:36:18,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 00:36:18,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 00:36:18,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 00:36:18,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 00:36:18,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 00:36:18,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 00:36:18,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 00:36:18,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 00:36:18,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 00:36:19,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 00:36:19,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 00:36:19,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 00:36:19,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 00:36:19,096 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 00:36:19,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c [2022-01-31 00:36:19,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f3dc4ae0/2e1eba23eda44e06be38f5f88ec2c7d5/FLAG7bcaf50b4 [2022-01-31 00:36:19,492 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 00:36:19,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c [2022-01-31 00:36:19,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f3dc4ae0/2e1eba23eda44e06be38f5f88ec2c7d5/FLAG7bcaf50b4 [2022-01-31 00:36:19,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f3dc4ae0/2e1eba23eda44e06be38f5f88ec2c7d5 [2022-01-31 00:36:19,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 00:36:19,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 00:36:19,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 00:36:19,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 00:36:19,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 00:36:19,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3da483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19, skipping insertion in model container [2022-01-31 00:36:19,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 00:36:19,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 00:36:19,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c[420,433] [2022-01-31 00:36:19,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:36:19,677 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 00:36:19,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tripl_access_init_const.c[420,433] [2022-01-31 00:36:19,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:36:19,747 INFO L208 MainTranslator]: Completed translation [2022-01-31 00:36:19,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19 WrapperNode [2022-01-31 00:36:19,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 00:36:19,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 00:36:19,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 00:36:19,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 00:36:19,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 00:36:19,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 00:36:19,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 00:36:19,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 00:36:19,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (1/1) ... [2022-01-31 00:36:19,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:36:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:36:19,834 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) [2022-01-31 00:36:19,847 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 [2022-01-31 00:36:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 00:36:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 00:36:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 00:36:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 00:36:19,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 00:36:19,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 00:36:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 00:36:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 00:36:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 00:36:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 00:36:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 00:36:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 00:36:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 00:36:19,926 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 00:36:19,927 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 00:36:20,029 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 00:36:20,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 00:36:20,034 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 00:36:20,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:36:20 BoogieIcfgContainer [2022-01-31 00:36:20,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 00:36:20,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 00:36:20,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 00:36:20,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 00:36:20,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:36:19" (1/3) ... [2022-01-31 00:36:20,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4477976f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:36:20, skipping insertion in model container [2022-01-31 00:36:20,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:36:19" (2/3) ... [2022-01-31 00:36:20,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4477976f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:36:20, skipping insertion in model container [2022-01-31 00:36:20,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:36:20" (3/3) ... [2022-01-31 00:36:20,043 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2022-01-31 00:36:20,047 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 00:36:20,047 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 00:36:20,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 00:36:20,108 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 00:36:20,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 00:36:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-01-31 00:36:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 00:36:20,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:36:20,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:36:20,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:36:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:36:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1271458174, now seen corresponding path program 1 times [2022-01-31 00:36:20,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:36:20,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767372318] [2022-01-31 00:36:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:20,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:36:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:36:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:20,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:36:20,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767372318] [2022-01-31 00:36:20,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767372318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:36:20,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:36:20,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 00:36:20,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610377002] [2022-01-31 00:36:20,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:36:20,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 00:36:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:36:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 00:36:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 00:36:20,463 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-01-31 00:36:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:36:20,531 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-31 00:36:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 00:36:20,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-01-31 00:36:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:36:20,538 INFO L225 Difference]: With dead ends: 42 [2022-01-31 00:36:20,538 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 00:36:20,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 00:36:20,544 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:36:20,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:36:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 00:36:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-31 00:36:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:36:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-01-31 00:36:20,574 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-01-31 00:36:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:36:20,575 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-01-31 00:36:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-01-31 00:36:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-01-31 00:36:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 00:36:20,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:36:20,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:36:20,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 00:36:20,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:36:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:36:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2104007360, now seen corresponding path program 1 times [2022-01-31 00:36:20,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:36:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87838148] [2022-01-31 00:36:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:20,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:36:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:36:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:20,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:36:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87838148] [2022-01-31 00:36:20,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87838148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:36:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596331324] [2022-01-31 00:36:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:20,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:20,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:36:20,660 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) [2022-01-31 00:36:20,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 00:36:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 00:36:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:36:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:20,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:36:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:20,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596331324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:36:20,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:36:20,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-31 00:36:20,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933944139] [2022-01-31 00:36:20,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:36:20,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 00:36:20,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:36:20,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 00:36:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 00:36:20,922 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-01-31 00:36:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:36:21,016 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-31 00:36:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 00:36:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 [2022-01-31 00:36:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:36:21,018 INFO L225 Difference]: With dead ends: 37 [2022-01-31 00:36:21,018 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 00:36:21,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-01-31 00:36:21,020 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:36:21,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:36:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 00:36:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 00:36:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:36:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-31 00:36:21,034 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 15 [2022-01-31 00:36:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:36:21,034 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-31 00:36:21,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-01-31 00:36:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-31 00:36:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 00:36:21,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:36:21,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:36:21,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 00:36:21,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:21,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:36:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:36:21,257 INFO L85 PathProgramCache]: Analyzing trace with hash 493585530, now seen corresponding path program 2 times [2022-01-31 00:36:21,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:36:21,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018546833] [2022-01-31 00:36:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:21,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:36:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:36:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:21,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:36:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018546833] [2022-01-31 00:36:21,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018546833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:36:21,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130839679] [2022-01-31 00:36:21,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:36:21,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:21,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:36:21,368 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) [2022-01-31 00:36:21,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 00:36:21,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:36:21,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:36:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 00:36:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:36:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:21,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:36:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:21,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130839679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:36:21,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:36:21,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-31 00:36:21,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220587004] [2022-01-31 00:36:21,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:36:21,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 00:36:21,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:36:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 00:36:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2022-01-31 00:36:21,639 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-01-31 00:36:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:36:21,805 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-01-31 00:36:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 00:36:21,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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 [2022-01-31 00:36:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:36:21,807 INFO L225 Difference]: With dead ends: 49 [2022-01-31 00:36:21,807 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 00:36:21,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2022-01-31 00:36:21,808 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:36:21,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:36:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 00:36:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-31 00:36:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:36:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-01-31 00:36:21,815 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 21 [2022-01-31 00:36:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:36:21,815 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-01-31 00:36:21,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 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) [2022-01-31 00:36:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-01-31 00:36:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 00:36:21,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:36:21,816 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:36:21,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 00:36:22,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 00:36:22,046 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:36:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:36:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash 182642798, now seen corresponding path program 3 times [2022-01-31 00:36:22,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:36:22,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56866821] [2022-01-31 00:36:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:22,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:36:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:22,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:36:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:22,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:36:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56866821] [2022-01-31 00:36:22,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56866821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:36:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028126569] [2022-01-31 00:36:22,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:36:22,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:36:22,272 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) [2022-01-31 00:36:22,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 00:36:22,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 00:36:22,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:36:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 00:36:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:36:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:22,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:36:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:23,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028126569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:36:23,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:36:23,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-01-31 00:36:23,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376379263] [2022-01-31 00:36:23,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:36:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 00:36:23,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:36:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 00:36:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=708, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 00:36:23,219 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 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) [2022-01-31 00:36:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:36:23,705 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-01-31 00:36:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 00:36:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 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 33 [2022-01-31 00:36:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:36:23,707 INFO L225 Difference]: With dead ends: 73 [2022-01-31 00:36:23,707 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 00:36:23,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1168, Invalid=2138, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 00:36:23,713 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:36:23,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 49 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:36:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 00:36:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 00:36:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:36:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-01-31 00:36:23,729 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 33 [2022-01-31 00:36:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:36:23,730 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-01-31 00:36:23,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 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) [2022-01-31 00:36:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-01-31 00:36:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 00:36:23,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:36:23,731 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:36:23,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 00:36:23,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:23,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:36:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:36:23,933 INFO L85 PathProgramCache]: Analyzing trace with hash -494418346, now seen corresponding path program 4 times [2022-01-31 00:36:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:36:23,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516662615] [2022-01-31 00:36:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:23,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:36:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:24,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:36:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:24,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:36:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516662615] [2022-01-31 00:36:24,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516662615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:36:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062326365] [2022-01-31 00:36:24,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 00:36:24,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:24,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:36:24,339 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) [2022-01-31 00:36:24,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 00:36:24,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 00:36:24,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:36:24,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 00:36:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:36:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:25,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:36:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062326365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:36:25,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:36:25,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 72 [2022-01-31 00:36:25,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025494197] [2022-01-31 00:36:25,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:36:25,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 00:36:25,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:36:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 00:36:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2256, Invalid=2856, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 00:36:25,783 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 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) [2022-01-31 00:36:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:36:27,032 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2022-01-31 00:36:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 00:36:27,032 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 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 57 [2022-01-31 00:36:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:36:27,033 INFO L225 Difference]: With dead ends: 121 [2022-01-31 00:36:27,034 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 00:36:27,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4786, Invalid=9020, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 00:36:27,040 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 00:36:27,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 34 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 00:36:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 00:36:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-01-31 00:36:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:36:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-01-31 00:36:27,051 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 57 [2022-01-31 00:36:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:36:27,051 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-01-31 00:36:27,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 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) [2022-01-31 00:36:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-01-31 00:36:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 00:36:27,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:36:27,054 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:36:27,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 00:36:27,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:27,272 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:36:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:36:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1790302758, now seen corresponding path program 5 times [2022-01-31 00:36:27,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:36:27,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416928708] [2022-01-31 00:36:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:36:27,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:36:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:28,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:36:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:36:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:36:28,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:36:28,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416928708] [2022-01-31 00:36:28,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416928708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:36:28,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818740130] [2022-01-31 00:36:28,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 00:36:28,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:36:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:36:28,349 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) [2022-01-31 00:36:28,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process