/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-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:58:29,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:58:29,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:58:29,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:58:30,028 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 21:58:30,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:58:30,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:58:30,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:58:30,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:58:30,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:58:30,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:58:30,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:58:30,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:58:30,053 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:58:30,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:58:30,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:58:30,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:58:30,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:58:30,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:58:30,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:58:30,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:58:30,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:58:30,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:58:30,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:58:30,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:58:30,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:58:30,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:58:30,236 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:58:30,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-30 21:58:30,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcbddba72/8b0c8b333e04402a97b70f83dada188e/FLAG10f804694 [2022-01-30 21:58:30,659 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:58:30,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-30 21:58:30,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcbddba72/8b0c8b333e04402a97b70f83dada188e/FLAG10f804694 [2022-01-30 21:58:30,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcbddba72/8b0c8b333e04402a97b70f83dada188e [2022-01-30 21:58:30,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:58:30,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:58:30,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:58:30,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:58:30,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:58:30,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673a63ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30, skipping insertion in model container [2022-01-30 21:58:30,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:58:30,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:58:30,806 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-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-30 21:58:30,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:58:30,851 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:58:30,859 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-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-30 21:58:30,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:58:30,876 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:58:30,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30 WrapperNode [2022-01-30 21:58:30,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:58:30,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:58:30,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:58:30,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:58:30,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:58:30,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:58:30,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:58:30,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:58:30,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (1/1) ... [2022-01-30 21:58:30,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:58:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:30,939 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 21:58:30,944 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 21:58:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:58:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:58:30,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:58:30,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:58:30,968 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2022-01-30 21:58:30,968 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2022-01-30 21:58:30,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:58:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:58:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:58:31,022 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:58:31,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:58:31,197 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:58:31,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:58:31,203 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-30 21:58:31,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:58:31 BoogieIcfgContainer [2022-01-30 21:58:31,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:58:31,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:58:31,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:58:31,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:58:31,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:58:30" (1/3) ... [2022-01-30 21:58:31,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e6df85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:58:31, skipping insertion in model container [2022-01-30 21:58:31,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:58:30" (2/3) ... [2022-01-30 21:58:31,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e6df85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:58:31, skipping insertion in model container [2022-01-30 21:58:31,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:58:31" (3/3) ... [2022-01-30 21:58:31,210 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-01-30 21:58:31,213 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:58:31,214 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:58:31,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:58:31,252 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 21:58:31,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:58:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 38 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 21:58:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 21:58:31,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:31,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:31,285 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash 29373732, now seen corresponding path program 1 times [2022-01-30 21:58:31,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:31,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828188446] [2022-01-30 21:58:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:31,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:31,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:31,500 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 21:58:31,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:31,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828188446] [2022-01-30 21:58:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828188446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:31,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:31,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:58:31,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776550854] [2022-01-30 21:58:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:31,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:58:31,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:58:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:58:31,535 INFO L87 Difference]: Start difference. First operand has 49 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 38 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 21:58:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:31,612 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2022-01-30 21:58:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:58:31,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 18 [2022-01-30 21:58:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:31,629 INFO L225 Difference]: With dead ends: 90 [2022-01-30 21:58:31,629 INFO L226 Difference]: Without dead ends: 44 [2022-01-30 21:58:31,632 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 21:58:31,636 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:31,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:58:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-30 21:58:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-30 21:58:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:58:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-30 21:58:31,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 18 [2022-01-30 21:58:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:31,671 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-30 21:58:31,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 21:58:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-30 21:58:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 21:58:31,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:31,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:31,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:58:31,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2092387303, now seen corresponding path program 1 times [2022-01-30 21:58:31,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:31,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580175742] [2022-01-30 21:58:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:31,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:31,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:31,790 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 21:58:31,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:31,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580175742] [2022-01-30 21:58:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580175742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:31,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:31,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:58:31,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408307493] [2022-01-30 21:58:31,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:31,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 21:58:31,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 21:58:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:58:31,797 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:58:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:31,957 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2022-01-30 21:58:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 21:58:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-30 21:58:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:31,961 INFO L225 Difference]: With dead ends: 91 [2022-01-30 21:58:31,961 INFO L226 Difference]: Without dead ends: 55 [2022-01-30 21:58:31,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 21:58:31,968 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:31,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:58:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-30 21:58:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-01-30 21:58:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:58:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-01-30 21:58:31,988 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-01-30 21:58:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:31,989 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-01-30 21:58:31,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:58:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-01-30 21:58:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 21:58:31,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:31,989 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 21:58:31,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:58:31,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:31,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1216477349, now seen corresponding path program 1 times [2022-01-30 21:58:31,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:31,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895018921] [2022-01-30 21:58:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:31,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:58:32,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:32,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895018921] [2022-01-30 21:58:32,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895018921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:32,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:32,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:58:32,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392579608] [2022-01-30 21:58:32,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 21:58:32,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 21:58:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:58:32,072 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:58:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:32,184 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-30 21:58:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 21:58:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-30 21:58:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:32,185 INFO L225 Difference]: With dead ends: 70 [2022-01-30 21:58:32,185 INFO L226 Difference]: Without dead ends: 52 [2022-01-30 21:58:32,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 21:58:32,186 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 90 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:32,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 42 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:58:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-30 21:58:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-30 21:58:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 21:58:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-01-30 21:58:32,192 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 20 [2022-01-30 21:58:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:32,193 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-01-30 21:58:32,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:58:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-01-30 21:58:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 21:58:32,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:32,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:32,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-30 21:58:32,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1281070043, now seen corresponding path program 1 times [2022-01-30 21:58:32,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958030072] [2022-01-30 21:58:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:32,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-30 21:58:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:58:32,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958030072] [2022-01-30 21:58:32,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958030072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:32,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:32,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 21:58:32,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796047195] [2022-01-30 21:58:32,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:32,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 21:58:32,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 21:58:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:58:32,253 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 21:58:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:32,378 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2022-01-30 21:58:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 21:58:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-30 21:58:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:32,380 INFO L225 Difference]: With dead ends: 85 [2022-01-30 21:58:32,380 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 21:58:32,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-30 21:58:32,388 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:32,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:58:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 21:58:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-30 21:58:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-30 21:58:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-30 21:58:32,405 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 30 [2022-01-30 21:58:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:32,405 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-30 21:58:32,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 21:58:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-30 21:58:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 21:58:32,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:32,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:32,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-30 21:58:32,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash 704321294, now seen corresponding path program 1 times [2022-01-30 21:58:32,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:32,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683120840] [2022-01-30 21:58:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:32,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-30 21:58:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-30 21:58:32,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683120840] [2022-01-30 21:58:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683120840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:32,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-30 21:58:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029381600] [2022-01-30 21:58:32,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 21:58:32,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 21:58:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-30 21:58:32,485 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:58:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:32,629 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-01-30 21:58:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 21:58:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-30 21:58:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:32,637 INFO L225 Difference]: With dead ends: 98 [2022-01-30 21:58:32,637 INFO L226 Difference]: Without dead ends: 59 [2022-01-30 21:58:32,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-30 21:58:32,639 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:32,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:58:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-30 21:58:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-30 21:58:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-30 21:58:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-30 21:58:32,656 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2022-01-30 21:58:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:32,656 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-30 21:58:32,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:58:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-30 21:58:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-30 21:58:32,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:32,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:32,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-30 21:58:32,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash -605894808, now seen corresponding path program 1 times [2022-01-30 21:58:32,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:32,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471933936] [2022-01-30 21:58:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:32,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-30 21:58:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-30 21:58:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 21:58:32,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:32,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471933936] [2022-01-30 21:58:32,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471933936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:32,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:32,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 21:58:32,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457153746] [2022-01-30 21:58:32,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 21:58:32,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 21:58:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:58:32,709 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-30 21:58:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:32,810 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-01-30 21:58:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 21:58:32,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-01-30 21:58:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:32,812 INFO L225 Difference]: With dead ends: 72 [2022-01-30 21:58:32,812 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 21:58:32,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:58:32,814 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 75 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:32,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:58:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 21:58:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-30 21:58:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-30 21:58:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-30 21:58:32,824 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 35 [2022-01-30 21:58:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:32,825 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-30 21:58:32,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-30 21:58:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-30 21:58:32,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-30 21:58:32,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:32,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:32,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-30 21:58:32,826 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:32,826 INFO L85 PathProgramCache]: Analyzing trace with hash -785338614, now seen corresponding path program 1 times [2022-01-30 21:58:32,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:32,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719882872] [2022-01-30 21:58:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:32,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-30 21:58:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-30 21:58:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 21:58:32,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719882872] [2022-01-30 21:58:32,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719882872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:58:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646082344] [2022-01-30 21:58:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:32,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:32,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:32,939 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 21:58:32,940 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 21:58:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 21:58:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:58:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 21:58:33,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:58:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 21:58:33,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646082344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:58:33,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:58:33,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-01-30 21:58:33,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721099737] [2022-01-30 21:58:33,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:58:33,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 21:58:33,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:33,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 21:58:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-30 21:58:33,216 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-30 21:58:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:33,606 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2022-01-30 21:58:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-30 21:58:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2022-01-30 21:58:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:33,608 INFO L225 Difference]: With dead ends: 171 [2022-01-30 21:58:33,608 INFO L226 Difference]: Without dead ends: 123 [2022-01-30 21:58:33,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-01-30 21:58:33,609 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 201 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:33,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 38 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:58:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-30 21:58:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2022-01-30 21:58:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.2) internal successors, (72), 62 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-30 21:58:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-01-30 21:58:33,617 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 39 [2022-01-30 21:58:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:33,617 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-01-30 21:58:33,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-30 21:58:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-01-30 21:58:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 21:58:33,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:33,618 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:33,667 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 21:58:33,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:33,819 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:33,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash 768335451, now seen corresponding path program 2 times [2022-01-30 21:58:33,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:33,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715273349] [2022-01-30 21:58:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:33,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:33,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:33,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-30 21:58:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:33,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 21:58:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-30 21:58:33,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:33,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715273349] [2022-01-30 21:58:33,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715273349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:58:33,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:58:33,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-30 21:58:33,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285887864] [2022-01-30 21:58:33,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:58:33,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 21:58:33,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 21:58:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:58:33,894 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-30 21:58:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:33,967 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-01-30 21:58:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 21:58:33,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-01-30 21:58:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:33,968 INFO L225 Difference]: With dead ends: 92 [2022-01-30 21:58:33,968 INFO L226 Difference]: Without dead ends: 73 [2022-01-30 21:58:33,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-30 21:58:33,969 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:33,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:58:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-30 21:58:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-01-30 21:58:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 62 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-30 21:58:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-01-30 21:58:33,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 48 [2022-01-30 21:58:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:33,975 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-01-30 21:58:33,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-30 21:58:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-01-30 21:58:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 21:58:33,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:33,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:33,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-30 21:58:33,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -242781799, now seen corresponding path program 1 times [2022-01-30 21:58:33,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:33,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647179413] [2022-01-30 21:58:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:33,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:34,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:34,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-30 21:58:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:34,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 21:58:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:34,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647179413] [2022-01-30 21:58:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647179413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:58:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966968509] [2022-01-30 21:58:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:34,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:34,055 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 21:58:34,056 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 21:58:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 21:58:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:58:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:34,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:58:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:34,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966968509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:58:34,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:58:34,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-30 21:58:34,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711815580] [2022-01-30 21:58:34,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:58:34,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-30 21:58:34,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-30 21:58:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2022-01-30 21:58:34,370 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:34,811 INFO L93 Difference]: Finished difference Result 228 states and 270 transitions. [2022-01-30 21:58:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-30 21:58:34,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-01-30 21:58:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:34,812 INFO L225 Difference]: With dead ends: 228 [2022-01-30 21:58:34,812 INFO L226 Difference]: Without dead ends: 170 [2022-01-30 21:58:34,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2022-01-30 21:58:34,814 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 449 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:34,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 35 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:58:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-30 21:58:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 85. [2022-01-30 21:58:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-30 21:58:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-01-30 21:58:34,821 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 48 [2022-01-30 21:58:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:34,822 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-01-30 21:58:34,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-01-30 21:58:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-30 21:58:34,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:34,822 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:34,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 21:58:35,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-30 21:58:35,036 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash -158103387, now seen corresponding path program 2 times [2022-01-30 21:58:35,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961532803] [2022-01-30 21:58:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:35,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:35,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 21:58:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 21:58:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:35,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:35,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961532803] [2022-01-30 21:58:35,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961532803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:58:35,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104900904] [2022-01-30 21:58:35,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:58:35,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:35,197 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 21:58:35,198 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 21:58:35,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:58:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:58:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 21:58:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:58:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:35,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:58:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:35,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104900904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:58:35,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:58:35,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-01-30 21:58:35,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585376475] [2022-01-30 21:58:35,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:58:35,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-30 21:58:35,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-30 21:58:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=899, Unknown=0, NotChecked=0, Total=1482 [2022-01-30 21:58:35,738 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:36,644 INFO L93 Difference]: Finished difference Result 372 states and 444 transitions. [2022-01-30 21:58:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-30 21:58:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-01-30 21:58:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:36,646 INFO L225 Difference]: With dead ends: 372 [2022-01-30 21:58:36,646 INFO L226 Difference]: Without dead ends: 314 [2022-01-30 21:58:36,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1353, Invalid=2937, Unknown=0, NotChecked=0, Total=4290 [2022-01-30 21:58:36,648 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 679 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:36,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 39 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 21:58:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-30 21:58:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 109. [2022-01-30 21:58:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 98 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-30 21:58:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-01-30 21:58:36,659 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 60 [2022-01-30 21:58:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:36,659 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-01-30 21:58:36,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-01-30 21:58:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-30 21:58:36,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:36,660 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:36,678 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 21:58:36,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:36,878 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:36,879 INFO L85 PathProgramCache]: Analyzing trace with hash -409722691, now seen corresponding path program 3 times [2022-01-30 21:58:36,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:36,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476176992] [2022-01-30 21:58:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:36,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 21:58:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:37,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-30 21:58:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 21:58:37,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476176992] [2022-01-30 21:58:37,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476176992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:58:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830166442] [2022-01-30 21:58:37,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:58:37,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:37,213 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 21:58:37,214 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 21:58:37,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 21:58:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:58:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 21:58:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:58:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-01-30 21:58:37,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:58:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-01-30 21:58:37,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830166442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:58:37,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:58:37,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 33 [2022-01-30 21:58:37,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182027636] [2022-01-30 21:58:37,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:58:37,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-30 21:58:37,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:37,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-30 21:58:37,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-01-30 21:58:37,605 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 31 states have internal predecessors, (106), 6 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-30 21:58:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:38,825 INFO L93 Difference]: Finished difference Result 417 states and 496 transitions. [2022-01-30 21:58:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-30 21:58:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 31 states have internal predecessors, (106), 6 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 84 [2022-01-30 21:58:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:38,827 INFO L225 Difference]: With dead ends: 417 [2022-01-30 21:58:38,827 INFO L226 Difference]: Without dead ends: 359 [2022-01-30 21:58:38,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1115, Invalid=3045, Unknown=0, NotChecked=0, Total=4160 [2022-01-30 21:58:38,829 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 804 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:38,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 38 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-30 21:58:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-30 21:58:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 135. [2022-01-30 21:58:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 117 states have (on average 1.1025641025641026) internal successors, (129), 116 states have internal predecessors, (129), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 21:58:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-01-30 21:58:38,842 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 84 [2022-01-30 21:58:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-01-30 21:58:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 31 states have internal predecessors, (106), 6 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-30 21:58:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-01-30 21:58:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-30 21:58:38,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:38,843 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:38,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 21:58:39,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:39,060 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2054277446, now seen corresponding path program 1 times [2022-01-30 21:58:39,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901623592] [2022-01-30 21:58:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:39,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-30 21:58:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-30 21:58:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-30 21:58:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-30 21:58:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-30 21:58:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:58:39,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901623592] [2022-01-30 21:58:39,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901623592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:58:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088550634] [2022-01-30 21:58:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:39,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:39,411 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 21:58:39,412 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 21:58:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:39,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-30 21:58:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:58:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:58:40,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:58:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:58:40,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088550634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:58:40,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:58:40,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 78 [2022-01-30 21:58:40,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385611467] [2022-01-30 21:58:40,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:58:40,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-30 21:58:40,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-30 21:58:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2507, Invalid=3499, Unknown=0, NotChecked=0, Total=6006 [2022-01-30 21:58:40,952 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 76 states have internal predecessors, (187), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:43,724 INFO L93 Difference]: Finished difference Result 732 states and 891 transitions. [2022-01-30 21:58:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-30 21:58:43,725 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 76 states have internal predecessors, (187), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2022-01-30 21:58:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:43,727 INFO L225 Difference]: With dead ends: 732 [2022-01-30 21:58:43,727 INFO L226 Difference]: Without dead ends: 650 [2022-01-30 21:58:43,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5552, Invalid=11478, Unknown=0, NotChecked=0, Total=17030 [2022-01-30 21:58:43,732 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2440 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 1399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1399 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:43,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 37 Invalid, 2514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1399 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-30 21:58:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-30 21:58:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 185. [2022-01-30 21:58:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 167 states have (on average 1.0718562874251496) internal successors, (179), 166 states have internal predecessors, (179), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 21:58:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2022-01-30 21:58:43,751 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 116 [2022-01-30 21:58:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:43,752 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2022-01-30 21:58:43,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 76 states have internal predecessors, (187), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2022-01-30 21:58:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-30 21:58:43,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:43,753 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:43,777 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 21:58:43,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 21:58:43,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1493071816, now seen corresponding path program 2 times [2022-01-30 21:58:43,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:43,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287346743] [2022-01-30 21:58:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:43,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:58:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-30 21:58:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:45,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-30 21:58:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:45,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-30 21:58:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:45,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-30 21:58:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-30 21:58:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:58:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:58:45,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:58:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287346743] [2022-01-30 21:58:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287346743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:58:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835719376] [2022-01-30 21:58:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:58:45,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:58:45,027 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 21:58:45,028 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 21:58:45,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:58:45,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:58:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-30 21:58:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:58:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:58:46,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:58:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:58:49,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835719376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:58:49,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:58:49,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52, 52] total 153 [2022-01-30 21:58:49,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593307014] [2022-01-30 21:58:49,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:58:49,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-30 21:58:49,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:58:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-30 21:58:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10007, Invalid=13249, Unknown=0, NotChecked=0, Total=23256 [2022-01-30 21:58:49,077 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand has 153 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 151 states have internal predecessors, (337), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:58:58,317 INFO L93 Difference]: Finished difference Result 1332 states and 1616 transitions. [2022-01-30 21:58:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-30 21:58:58,318 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 151 states have internal predecessors, (337), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 166 [2022-01-30 21:58:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:58:58,322 INFO L225 Difference]: With dead ends: 1332 [2022-01-30 21:58:58,322 INFO L226 Difference]: Without dead ends: 1250 [2022-01-30 21:58:58,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20236 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=21702, Invalid=43578, Unknown=0, NotChecked=0, Total=65280 [2022-01-30 21:58:58,336 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 4840 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 2801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4840 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2801 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:58:58,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4840 Valid, 38 Invalid, 4855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2801 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-30 21:58:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-01-30 21:58:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 285. [2022-01-30 21:58:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 267 states have (on average 1.0449438202247192) internal successors, (279), 266 states have internal predecessors, (279), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 21:58:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2022-01-30 21:58:58,394 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 166 [2022-01-30 21:58:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:58:58,394 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2022-01-30 21:58:58,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 151 states have internal predecessors, (337), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 21:58:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2022-01-30 21:58:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-30 21:58:58,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:58:58,405 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:58:58,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-30 21:58:58,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:58:58,621 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:58:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:58:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1932395676, now seen corresponding path program 3 times [2022-01-30 21:58:58,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:58:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985068948] [2022-01-30 21:58:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:58:58,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:58:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:59:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-01-30 21:59:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-01-30 21:59:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-30 21:59:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2022-01-30 21:59:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-01-30 21:59:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9670 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-30 21:59:02,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:59:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985068948] [2022-01-30 21:59:02,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985068948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:59:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110782576] [2022-01-30 21:59:02,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:59:02,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:59:02,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:59:02,113 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 21:59:02,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 21:59:02,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 21:59:02,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:59:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:59:02,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:59:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9670 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2022-01-30 21:59:02,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:59:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9670 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2022-01-30 21:59:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110782576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:59:03,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:59:03,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 6, 6] total 111 [2022-01-30 21:59:03,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686187652] [2022-01-30 21:59:03,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:59:03,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-30 21:59:03,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:59:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-30 21:59:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5482, Invalid=6728, Unknown=0, NotChecked=0, Total=12210 [2022-01-30 21:59:03,384 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 111 states, 111 states have (on average 2.5675675675675675) internal successors, (285), 109 states have internal predecessors, (285), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-30 21:59:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:59:31,919 INFO L93 Difference]: Finished difference Result 2392 states and 2941 transitions. [2022-01-30 21:59:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2022-01-30 21:59:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.5675675675675675) internal successors, (285), 109 states have internal predecessors, (285), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 266 [2022-01-30 21:59:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:59:31,927 INFO L225 Difference]: With dead ends: 2392 [2022-01-30 21:59:31,927 INFO L226 Difference]: Without dead ends: 2310 [2022-01-30 21:59:31,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 419 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49307 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=54224, Invalid=122596, Unknown=0, NotChecked=0, Total=176820 [2022-01-30 21:59:31,937 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6659 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 4109 mSolverCounterSat, 7133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6659 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7133 IncrementalHoareTripleChecker+Valid, 4109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-30 21:59:31,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6659 Valid, 42 Invalid, 11242 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7133 Valid, 4109 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-30 21:59:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-01-30 21:59:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 788. [2022-01-30 21:59:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 770 states have (on average 1.1454545454545455) internal successors, (882), 769 states have internal predecessors, (882), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 21:59:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 909 transitions. [2022-01-30 21:59:32,326 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 909 transitions. Word has length 266 [2022-01-30 21:59:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:59:32,327 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 909 transitions. [2022-01-30 21:59:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.5675675675675675) internal successors, (285), 109 states have internal predecessors, (285), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-30 21:59:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 909 transitions. [2022-01-30 21:59:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-30 21:59:32,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:59:32,330 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:59:32,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 21:59:32,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:59:32,548 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:59:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:59:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1105900295, now seen corresponding path program 1 times [2022-01-30 21:59:32,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:59:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756448429] [2022-01-30 21:59:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:59:32,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:59:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:35,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:59:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:35,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-01-30 21:59:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:36,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-30 21:59:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:36,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-01-30 21:59:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-01-30 21:59:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-01-30 21:59:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10275 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-30 21:59:36,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:59:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756448429] [2022-01-30 21:59:36,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756448429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:59:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737454986] [2022-01-30 21:59:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:59:36,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:59:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:59:36,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:59:36,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 21:59:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:59:36,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-30 21:59:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:59:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10275 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-30 21:59:40,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:59:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10275 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-30 21:59:49,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737454986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:59:49,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:59:49,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 105, 105] total 312 [2022-01-30 21:59:49,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11677188] [2022-01-30 21:59:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:59:49,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 312 states [2022-01-30 21:59:49,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:59:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2022-01-30 21:59:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42443, Invalid=54589, Unknown=0, NotChecked=0, Total=97032 [2022-01-30 21:59:49,957 INFO L87 Difference]: Start difference. First operand 788 states and 909 transitions. Second operand has 312 states, 312 states have (on average 2.105769230769231) internal successors, (657), 310 states have internal predecessors, (657), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:00:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:00:49,011 INFO L93 Difference]: Finished difference Result 3296 states and 3945 transitions. [2022-01-30 22:00:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-01-30 22:00:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 312 states, 312 states have (on average 2.105769230769231) internal successors, (657), 310 states have internal predecessors, (657), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 277 [2022-01-30 22:00:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:00:49,019 INFO L225 Difference]: With dead ends: 3296 [2022-01-30 22:00:49,019 INFO L226 Difference]: Without dead ends: 2717 [2022-01-30 22:00:49,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85373 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=91079, Invalid=179841, Unknown=0, NotChecked=0, Total=270920 [2022-01-30 22:00:49,032 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 9977 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4889 mSolverCounterSat, 5763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9977 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5763 IncrementalHoareTripleChecker+Valid, 4889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:00:49,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9977 Valid, 42 Invalid, 10652 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5763 Valid, 4889 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-30 22:00:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-01-30 22:00:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 994. [2022-01-30 22:00:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 976 states have (on average 1.1147540983606556) internal successors, (1088), 975 states have internal predecessors, (1088), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-30 22:00:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1115 transitions. [2022-01-30 22:00:49,399 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1115 transitions. Word has length 277 [2022-01-30 22:00:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:00:49,399 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1115 transitions. [2022-01-30 22:00:49,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 312 states, 312 states have (on average 2.105769230769231) internal successors, (657), 310 states have internal predecessors, (657), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-30 22:00:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1115 transitions. [2022-01-30 22:00:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-30 22:00:49,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:00:49,405 INFO L514 BasicCegarLoop]: trace histogram [204, 204, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:00:49,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:00:49,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-30 22:00:49,625 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:00:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:00:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1445434667, now seen corresponding path program 2 times [2022-01-30 22:00:49,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:00:49,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964792549] [2022-01-30 22:00:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:00:49,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:00:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:01:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-01-30 22:01:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2022-01-30 22:01:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2022-01-30 22:01:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2022-01-30 22:01:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2022-01-30 22:01:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:01:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41690 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-30 22:01:02,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:01:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964792549] [2022-01-30 22:01:02,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964792549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:01:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903031220] [2022-01-30 22:01:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:01:02,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:01:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:01:02,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:01:02,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:01:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:01:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:01:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 3796 conjuncts, 207 conjunts are in the unsatisfiable core [2022-01-30 22:01:03,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:01:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 41690 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-30 22:01:18,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:01:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41690 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-30 22:01:54,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903031220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:01:54,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:01:54,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [210, 208, 208] total 621 [2022-01-30 22:01:54,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683412668] [2022-01-30 22:01:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:01:54,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 621 states [2022-01-30 22:01:54,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:01:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 621 interpolants. [2022-01-30 22:01:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169751, Invalid=215269, Unknown=0, NotChecked=0, Total=385020 [2022-01-30 22:01:54,868 INFO L87 Difference]: Start difference. First operand 994 states and 1115 transitions. Second operand has 621 states, 621 states have (on average 2.0531400966183573) internal successors, (1275), 619 states have internal predecessors, (1275), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6)