/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-examples/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 20:15:52,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 20:15:52,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 20:15:52,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 20:15:52,781 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 [2022-01-30 20:15:52,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 20:15:52,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 20:15:52,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 20:15:52,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 20:15:52,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 20:15:52,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 20:15:52,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 20:15:52,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 20:15:52,819 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 20:15:52,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 20:15:52,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 20:15:52,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 20:15:52,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 20:15:52,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 20:15:52,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 20:15:52,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 20:15:52,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 20:15:52,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 20:15:52,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:52,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 20:15:52,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 20:15:52,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 20:15:52,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 20:15:52,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 20:15:52,827 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 20:15:52,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 20:15:52,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 20:15:52,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 20:15:53,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 20:15:53,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 20:15:53,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 20:15:53,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 20:15:53,075 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 20:15:53,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2022-01-30 20:15:53,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30ea4ef1c/0dbf8fa5694b4ec0a5c076ff0cdea5f3/FLAGe5c840966 [2022-01-30 20:15:53,472 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 20:15:53,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2022-01-30 20:15:53,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30ea4ef1c/0dbf8fa5694b4ec0a5c076ff0cdea5f3/FLAGe5c840966 [2022-01-30 20:15:53,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30ea4ef1c/0dbf8fa5694b4ec0a5c076ff0cdea5f3 [2022-01-30 20:15:53,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 20:15:53,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 20:15:53,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:53,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 20:15:53,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 20:15:53,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ace02aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53, skipping insertion in model container [2022-01-30 20:15:53,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 20:15:53,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 20:15:53,721 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-examples/sorting_selectionsort_2_ground.i[823,836] [2022-01-30 20:15:53,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:53,762 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 20:15:53,774 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-examples/sorting_selectionsort_2_ground.i[823,836] [2022-01-30 20:15:53,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 20:15:53,793 INFO L208 MainTranslator]: Completed translation [2022-01-30 20:15:53,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53 WrapperNode [2022-01-30 20:15:53,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 20:15:53,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 20:15:53,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 20:15:53,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 20:15:53,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 20:15:53,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 20:15:53,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 20:15:53,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 20:15:53,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (1/1) ... [2022-01-30 20:15:53,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 20:15:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:53,872 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) [2022-01-30 20:15:53,893 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 [2022-01-30 20:15:53,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 20:15:53,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 20:15:53,922 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 20:15:53,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 20:15:53,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 20:15:53,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 20:15:53,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 20:15:53,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 20:15:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 20:15:53,980 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 20:15:53,981 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 20:15:54,110 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 20:15:54,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 20:15:54,115 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-30 20:15:54,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:54 BoogieIcfgContainer [2022-01-30 20:15:54,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 20:15:54,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 20:15:54,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 20:15:54,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 20:15:54,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 08:15:53" (1/3) ... [2022-01-30 20:15:54,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548b3035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:54, skipping insertion in model container [2022-01-30 20:15:54,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 08:15:53" (2/3) ... [2022-01-30 20:15:54,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548b3035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 08:15:54, skipping insertion in model container [2022-01-30 20:15:54,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 08:15:54" (3/3) ... [2022-01-30 20:15:54,130 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2022-01-30 20:15:54,133 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 20:15:54,133 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 20:15:54,170 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 20:15:54,175 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 [2022-01-30 20:15:54,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 20:15:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 20:15:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:54,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash -185709015, now seen corresponding path program 1 times [2022-01-30 20:15:54,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477904079] [2022-01-30 20:15:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477904079] [2022-01-30 20:15:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477904079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:54,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 20:15:54,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746207057] [2022-01-30 20:15:54,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 20:15:54,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 20:15:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 20:15:54,430 INFO L87 Difference]: Start difference. First operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 36 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,528 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-01-30 20:15:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 20:15:54,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-01-30 20:15:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,538 INFO L225 Difference]: With dead ends: 82 [2022-01-30 20:15:54,538 INFO L226 Difference]: Without dead ends: 40 [2022-01-30 20:15:54,541 INFO L932 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 [2022-01-30 20:15:54,558 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 20:15:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-30 20:15:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-30 20:15:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-01-30 20:15:54,604 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2022-01-30 20:15:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,604 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-01-30 20:15:54,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-01-30 20:15:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 20:15:54,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 20:15:54,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 874426105, now seen corresponding path program 1 times [2022-01-30 20:15:54,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332515630] [2022-01-30 20:15:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332515630] [2022-01-30 20:15:54,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332515630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:54,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:54,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 20:15:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002458172] [2022-01-30 20:15:54,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:54,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 20:15:54,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 20:15:54,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 20:15:54,715 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:54,882 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2022-01-30 20:15:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 20:15:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2022-01-30 20:15:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:54,886 INFO L225 Difference]: With dead ends: 92 [2022-01-30 20:15:54,886 INFO L226 Difference]: Without dead ends: 60 [2022-01-30 20:15:54,891 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 [2022-01-30 20:15:54,892 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:54,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 43 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:54,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-30 20:15:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2022-01-30 20:15:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 20:15:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-01-30 20:15:54,912 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2022-01-30 20:15:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:54,913 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-01-30 20:15:54,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-30 20:15:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-01-30 20:15:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 20:15:54,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:54,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:54,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 20:15:54,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2112897826, now seen corresponding path program 1 times [2022-01-30 20:15:54,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742480078] [2022-01-30 20:15:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:54,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:54,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742480078] [2022-01-30 20:15:54,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742480078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:54,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499286981] [2022-01-30 20:15:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:54,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:54,985 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) [2022-01-30 20:15:54,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 20:15:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 20:15:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 20:15:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499286981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:55,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:55,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 20:15:55,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615848698] [2022-01-30 20:15:55,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:55,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 20:15:55,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:55,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 20:15:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 20:15:55,171 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-01-30 20:15:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:55,421 INFO L93 Difference]: Finished difference Result 135 states and 186 transitions. [2022-01-30 20:15:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 20:15:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 20 [2022-01-30 20:15:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:55,422 INFO L225 Difference]: With dead ends: 135 [2022-01-30 20:15:55,422 INFO L226 Difference]: Without dead ends: 102 [2022-01-30 20:15:55,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 20:15:55,424 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 186 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:55,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 62 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 20:15:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-30 20:15:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-01-30 20:15:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 88 states have internal predecessors, (116), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-30 20:15:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 137 transitions. [2022-01-30 20:15:55,438 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 137 transitions. Word has length 20 [2022-01-30 20:15:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:55,439 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 137 transitions. [2022-01-30 20:15:55,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-01-30 20:15:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 137 transitions. [2022-01-30 20:15:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-30 20:15:55,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:55,440 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:55,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 20:15:55,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1916933892, now seen corresponding path program 2 times [2022-01-30 20:15:55,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:55,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997104271] [2022-01-30 20:15:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 20:15:55,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997104271] [2022-01-30 20:15:55,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997104271] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:55,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:55,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 20:15:55,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649085904] [2022-01-30 20:15:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:55,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 20:15:55,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 20:15:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:55,749 INFO L87 Difference]: Start difference. First operand 102 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-01-30 20:15:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:55,895 INFO L93 Difference]: Finished difference Result 187 states and 256 transitions. [2022-01-30 20:15:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 20:15:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 26 [2022-01-30 20:15:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:55,897 INFO L225 Difference]: With dead ends: 187 [2022-01-30 20:15:55,897 INFO L226 Difference]: Without dead ends: 105 [2022-01-30 20:15:55,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-30 20:15:55,898 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 91 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:55,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 47 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-30 20:15:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-01-30 20:15:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-30 20:15:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 138 transitions. [2022-01-30 20:15:55,910 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 138 transitions. Word has length 26 [2022-01-30 20:15:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:55,911 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 138 transitions. [2022-01-30 20:15:55,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-01-30 20:15:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 138 transitions. [2022-01-30 20:15:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-30 20:15:55,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:55,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:55,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-30 20:15:55,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1533032449, now seen corresponding path program 1 times [2022-01-30 20:15:55,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:55,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534587729] [2022-01-30 20:15:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-30 20:15:55,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534587729] [2022-01-30 20:15:55,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534587729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:55,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666732025] [2022-01-30 20:15:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:55,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:55,978 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) [2022-01-30 20:15:55,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 20:15:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:56,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 20:15:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:56,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 20:15:56,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666732025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:56,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:56,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-01-30 20:15:56,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674846585] [2022-01-30 20:15:56,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:56,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-30 20:15:56,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-30 20:15:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-01-30 20:15:56,231 INFO L87 Difference]: Start difference. First operand 103 states and 138 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 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) [2022-01-30 20:15:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:56,852 INFO L93 Difference]: Finished difference Result 319 states and 453 transitions. [2022-01-30 20:15:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-30 20:15:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 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 [2022-01-30 20:15:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:56,854 INFO L225 Difference]: With dead ends: 319 [2022-01-30 20:15:56,855 INFO L226 Difference]: Without dead ends: 231 [2022-01-30 20:15:56,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-01-30 20:15:56,856 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 669 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:56,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 59 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 20:15:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-30 20:15:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2022-01-30 20:15:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 201 states have (on average 1.3233830845771144) internal successors, (266), 201 states have internal predecessors, (266), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-30 20:15:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 311 transitions. [2022-01-30 20:15:56,880 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 311 transitions. Word has length 29 [2022-01-30 20:15:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:56,881 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 311 transitions. [2022-01-30 20:15:56,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 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) [2022-01-30 20:15:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 311 transitions. [2022-01-30 20:15:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-30 20:15:56,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:56,882 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:56,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-30 20:15:57,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1496725584, now seen corresponding path program 2 times [2022-01-30 20:15:57,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:57,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254123603] [2022-01-30 20:15:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 20:15:57,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254123603] [2022-01-30 20:15:57,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254123603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 20:15:57,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 20:15:57,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 20:15:57,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436516517] [2022-01-30 20:15:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 20:15:57,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 20:15:57,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 20:15:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 20:15:57,182 INFO L87 Difference]: Start difference. First operand 227 states and 311 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-01-30 20:15:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:57,275 INFO L93 Difference]: Finished difference Result 411 states and 572 transitions. [2022-01-30 20:15:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 20:15:57,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 44 [2022-01-30 20:15:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:57,277 INFO L225 Difference]: With dead ends: 411 [2022-01-30 20:15:57,277 INFO L226 Difference]: Without dead ends: 222 [2022-01-30 20:15:57,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-30 20:15:57,279 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:57,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 46 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 20:15:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-30 20:15:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-01-30 20:15:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 197 states have (on average 1.3197969543147208) internal successors, (260), 197 states have internal predecessors, (260), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-30 20:15:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 303 transitions. [2022-01-30 20:15:57,296 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 303 transitions. Word has length 44 [2022-01-30 20:15:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:57,297 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 303 transitions. [2022-01-30 20:15:57,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-01-30 20:15:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 303 transitions. [2022-01-30 20:15:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-30 20:15:57,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:57,298 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:57,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-30 20:15:57,298 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -638490134, now seen corresponding path program 1 times [2022-01-30 20:15:57,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:57,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994613601] [2022-01-30 20:15:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:57,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:57,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994613601] [2022-01-30 20:15:57,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994613601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:57,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963674700] [2022-01-30 20:15:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:57,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:57,435 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) [2022-01-30 20:15:57,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 20:15:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:57,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 20:15:57,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:57,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:15:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:57,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963674700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:15:57,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:15:57,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 20:15:57,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900233174] [2022-01-30 20:15:57,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:15:57,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 20:15:57,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:15:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 20:15:57,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 20:15:57,879 INFO L87 Difference]: Start difference. First operand 222 states and 303 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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) [2022-01-30 20:15:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:15:58,992 INFO L93 Difference]: Finished difference Result 657 states and 938 transitions. [2022-01-30 20:15:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 20:15:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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 [2022-01-30 20:15:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:15:58,996 INFO L225 Difference]: With dead ends: 657 [2022-01-30 20:15:58,996 INFO L226 Difference]: Without dead ends: 462 [2022-01-30 20:15:58,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-30 20:15:58,998 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1633 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 20:15:58,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 Valid, 57 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-30 20:15:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-30 20:15:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 462. [2022-01-30 20:15:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 413 states have (on average 1.3268765133171914) internal successors, (548), 413 states have internal predecessors, (548), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-30 20:15:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 639 transitions. [2022-01-30 20:15:59,020 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 639 transitions. Word has length 45 [2022-01-30 20:15:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:15:59,021 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 639 transitions. [2022-01-30 20:15:59,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 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) [2022-01-30 20:15:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 639 transitions. [2022-01-30 20:15:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-30 20:15:59,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:15:59,022 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:15:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 20:15:59,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:59,247 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:15:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:15:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1605941074, now seen corresponding path program 2 times [2022-01-30 20:15:59,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:15:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087121888] [2022-01-30 20:15:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:15:59,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:15:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:15:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:15:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:59,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:15:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087121888] [2022-01-30 20:15:59,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087121888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:15:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605561638] [2022-01-30 20:15:59,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 20:15:59,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:15:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:15:59,552 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) [2022-01-30 20:15:59,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 20:15:59,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 20:15:59,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:15:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 20:15:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:15:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:15:59,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:16:00,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605561638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:00,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:00,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 20:16:00,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605167697] [2022-01-30 20:16:00,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:00,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 20:16:00,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 20:16:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 20:16:00,361 INFO L87 Difference]: Start difference. First operand 462 states and 639 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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) [2022-01-30 20:16:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:03,285 INFO L93 Difference]: Finished difference Result 1353 states and 1946 transitions. [2022-01-30 20:16:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 20:16:03,286 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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 69 [2022-01-30 20:16:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:03,291 INFO L225 Difference]: With dead ends: 1353 [2022-01-30 20:16:03,292 INFO L226 Difference]: Without dead ends: 942 [2022-01-30 20:16:03,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-30 20:16:03,295 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5306 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5307 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:03,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5307 Valid, 56 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-30 20:16:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-30 20:16:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2022-01-30 20:16:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 845 states have (on average 1.3301775147928994) internal successors, (1124), 845 states have internal predecessors, (1124), 94 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-30 20:16:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1311 transitions. [2022-01-30 20:16:03,326 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1311 transitions. Word has length 69 [2022-01-30 20:16:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:03,328 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1311 transitions. [2022-01-30 20:16:03,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 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) [2022-01-30 20:16:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1311 transitions. [2022-01-30 20:16:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-30 20:16:03,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:03,333 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:03,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-30 20:16:03,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:03,550 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1783114274, now seen corresponding path program 3 times [2022-01-30 20:16:03,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211922397] [2022-01-30 20:16:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:03,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 20:16:04,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211922397] [2022-01-30 20:16:04,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211922397] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039187952] [2022-01-30 20:16:04,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 20:16:04,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:04,696 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) [2022-01-30 20:16:04,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 20:16:04,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 20:16:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-30 20:16:04,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-30 20:16:05,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-30 20:16:05,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039187952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:05,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:05,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6, 6] total 58 [2022-01-30 20:16:05,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357140544] [2022-01-30 20:16:05,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:05,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-30 20:16:05,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-30 20:16:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2002, Unknown=0, NotChecked=0, Total=3306 [2022-01-30 20:16:05,360 INFO L87 Difference]: Start difference. First operand 942 states and 1311 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 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) [2022-01-30 20:16:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:13,835 INFO L93 Difference]: Finished difference Result 2193 states and 3207 transitions. [2022-01-30 20:16:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-30 20:16:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 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 117 [2022-01-30 20:16:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:13,840 INFO L225 Difference]: With dead ends: 2193 [2022-01-30 20:16:13,840 INFO L226 Difference]: Without dead ends: 1350 [2022-01-30 20:16:13,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20315 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=20081, Invalid=45711, Unknown=0, NotChecked=0, Total=65792 [2022-01-30 20:16:13,851 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 5801 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 1575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5804 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1575 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:13,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5804 Valid, 88 Invalid, 3764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1575 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-30 20:16:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-01-30 20:16:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1331. [2022-01-30 20:16:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1230 states have (on average 1.3186991869918698) internal successors, (1622), 1230 states have internal predecessors, (1622), 98 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-30 20:16:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1817 transitions. [2022-01-30 20:16:13,886 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1817 transitions. Word has length 117 [2022-01-30 20:16:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:13,886 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 1817 transitions. [2022-01-30 20:16:13,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 57 states have internal predecessors, (133), 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) [2022-01-30 20:16:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1817 transitions. [2022-01-30 20:16:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-30 20:16:13,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:13,887 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:13,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:14,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 426891678, now seen corresponding path program 4 times [2022-01-30 20:16:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076590019] [2022-01-30 20:16:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:14,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:15,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-30 20:16:15,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:15,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076590019] [2022-01-30 20:16:15,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076590019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:15,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511262262] [2022-01-30 20:16:15,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 20:16:15,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:15,111 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) [2022-01-30 20:16:15,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 20:16:15,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 20:16:15,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 20:16:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-30 20:16:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 20:16:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-30 20:16:15,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 20:16:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-30 20:16:18,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511262262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 20:16:18,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 20:16:18,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-01-30 20:16:18,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178513194] [2022-01-30 20:16:18,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 20:16:18,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-30 20:16:18,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 20:16:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-30 20:16:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-30 20:16:18,015 INFO L87 Difference]: Start difference. First operand 1331 states and 1817 transitions. Second operand has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 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) [2022-01-30 20:16:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 20:16:27,371 INFO L93 Difference]: Finished difference Result 3609 states and 5080 transitions. [2022-01-30 20:16:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-30 20:16:27,372 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 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 133 [2022-01-30 20:16:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 20:16:27,406 INFO L225 Difference]: With dead ends: 3609 [2022-01-30 20:16:27,407 INFO L226 Difference]: Without dead ends: 2381 [2022-01-30 20:16:27,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2022-01-30 20:16:27,412 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 9114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 1857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9115 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1857 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-30 20:16:27,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9115 Valid, 70 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1857 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-30 20:16:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2022-01-30 20:16:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2022-01-30 20:16:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2180 states have (on average 1.3174311926605504) internal successors, (2872), 2180 states have internal predecessors, (2872), 198 states have call successors, (198), 3 states have call predecessors, (198), 2 states have return successors, (197), 197 states have call predecessors, (197), 197 states have call successors, (197) [2022-01-30 20:16:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 3267 transitions. [2022-01-30 20:16:27,553 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 3267 transitions. Word has length 133 [2022-01-30 20:16:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 20:16:27,554 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 3267 transitions. [2022-01-30 20:16:27,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 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) [2022-01-30 20:16:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 3267 transitions. [2022-01-30 20:16:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-30 20:16:27,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 20:16:27,557 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 20:16:27,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 20:16:27,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:27,776 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 20:16:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 20:16:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1906088058, now seen corresponding path program 5 times [2022-01-30 20:16:27,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 20:16:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675719964] [2022-01-30 20:16:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 20:16:27,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 20:16:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:30,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 20:16:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 20:16:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9655 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-30 20:16:30,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 20:16:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675719964] [2022-01-30 20:16:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675719964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 20:16:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651182217] [2022-01-30 20:16:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 20:16:30,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 20:16:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 20:16:30,391 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) [2022-01-30 20:16:30,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process