/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:02:48,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:02:48,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:02:48,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:02:48,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:02:48,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:02:48,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:02:48,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:02:48,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:02:48,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:02:48,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:02:48,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:02:48,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:02:48,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:02:48,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:02:48,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:02:48,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:02:48,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:02:48,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:02:48,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:02:48,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:02:48,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:02:48,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:02:48,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:02:48,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:02:48,740 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:02:48,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:02:48,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:02:48,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:02:48,967 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:02:48,968 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:02:48,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-20 13:02:49,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0b95670/c0c00b2bb40740e098cbbbab64ce59e3/FLAG442939106 [2022-03-20 13:02:49,327 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:02:49,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-03-20 13:02:49,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0b95670/c0c00b2bb40740e098cbbbab64ce59e3/FLAG442939106 [2022-03-20 13:02:49,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f0b95670/c0c00b2bb40740e098cbbbab64ce59e3 [2022-03-20 13:02:49,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:02:49,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:02:49,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:02:49,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:02:49,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:02:49,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:02:49" (1/1) ... [2022-03-20 13:02:49,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573cfe1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:49, skipping insertion in model container [2022-03-20 13:02:49,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:02:49" (1/1) ... [2022-03-20 13:02:49,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:02:49,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:02:49,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-20 13:02:49,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:02:49,975 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:02:49,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-03-20 13:02:49,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:02:50,002 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:02:50,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50 WrapperNode [2022-03-20 13:02:50,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:02:50,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:02:50,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:02:50,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:02:50,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:02:50,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:02:50,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:02:50,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:02:50,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (1/1) ... [2022-03-20 13:02:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:02:50,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:50,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:02:50,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:02:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:02:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:02:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:02:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:02:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:02:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:02:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:02:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:02:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 13:02:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 13:02:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:02:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:02:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:02:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:02:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:02:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:02:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:02:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:02:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:02:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:02:50,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:02:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:02:50,161 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:02:50,163 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:02:50,269 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:02:50,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:02:50,274 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 13:02:50,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:02:50 BoogieIcfgContainer [2022-03-20 13:02:50,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:02:50,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:02:50,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:02:50,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:02:50,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:02:49" (1/3) ... [2022-03-20 13:02:50,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77a1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:02:50, skipping insertion in model container [2022-03-20 13:02:50,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:02:50" (2/3) ... [2022-03-20 13:02:50,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77a1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:02:50, skipping insertion in model container [2022-03-20 13:02:50,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:02:50" (3/3) ... [2022-03-20 13:02:50,280 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-03-20 13:02:50,283 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:02:50,284 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:02:50,309 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:02:50,314 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:02:50,314 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:02:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:02:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 13:02:50,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:50,328 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:50,329 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash -250128701, now seen corresponding path program 1 times [2022-03-20 13:02:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:50,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557573772] [2022-03-20 13:02:50,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -250128701, now seen corresponding path program 2 times [2022-03-20 13:02:50,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719731634] [2022-03-20 13:02:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:50,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:50,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719731634] [2022-03-20 13:02:50,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719731634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:50,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:50,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:50,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557573772] [2022-03-20 13:02:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557573772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:50,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:50,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:50,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30462036] [2022-03-20 13:02:50,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:50,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:02:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:02:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:02:50,589 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:50,832 INFO L93 Difference]: Finished difference Result 88 states and 148 transitions. [2022-03-20 13:02:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:02:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-20 13:02:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:50,841 INFO L225 Difference]: With dead ends: 88 [2022-03-20 13:02:50,841 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 13:02:50,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:02:50,846 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:50,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 13:02:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 13:02:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:02:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-20 13:02:50,880 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 15 [2022-03-20 13:02:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:50,880 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-20 13:02:50,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-20 13:02:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 13:02:50,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:50,881 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:50,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:02:50,881 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash -254865470, now seen corresponding path program 1 times [2022-03-20 13:02:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:50,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27344363] [2022-03-20 13:02:50,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -254865470, now seen corresponding path program 2 times [2022-03-20 13:02:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893252480] [2022-03-20 13:02:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893252480] [2022-03-20 13:02:50,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893252480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:50,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:50,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:50,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:50,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27344363] [2022-03-20 13:02:50,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27344363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:50,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:50,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409513766] [2022-03-20 13:02:50,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:50,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:02:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:02:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:02:50,950 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:51,192 INFO L93 Difference]: Finished difference Result 71 states and 105 transitions. [2022-03-20 13:02:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:02:51,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-20 13:02:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:51,202 INFO L225 Difference]: With dead ends: 71 [2022-03-20 13:02:51,205 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 13:02:51,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:02:51,207 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:51,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 13:02:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-03-20 13:02:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:02:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-03-20 13:02:51,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2022-03-20 13:02:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:51,224 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-03-20 13:02:51,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-03-20 13:02:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 13:02:51,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:51,225 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:51,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 13:02:51,225 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash -216435080, now seen corresponding path program 1 times [2022-03-20 13:02:51,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:51,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774623105] [2022-03-20 13:02:51,227 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:51,227 INFO L85 PathProgramCache]: Analyzing trace with hash -216435080, now seen corresponding path program 2 times [2022-03-20 13:02:51,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270236947] [2022-03-20 13:02:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:51,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:51,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270236947] [2022-03-20 13:02:51,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270236947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:51,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:51,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:51,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774623105] [2022-03-20 13:02:51,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774623105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:51,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:51,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:51,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406801819] [2022-03-20 13:02:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:51,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:02:51,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:02:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:02:51,295 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:51,578 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2022-03-20 13:02:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-20 13:02:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:51,582 INFO L225 Difference]: With dead ends: 80 [2022-03-20 13:02:51,582 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 13:02:51,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:02:51,586 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:51,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 65 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 13:02:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2022-03-20 13:02:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 13:02:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2022-03-20 13:02:51,617 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 15 [2022-03-20 13:02:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:51,618 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2022-03-20 13:02:51,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2022-03-20 13:02:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 13:02:51,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:51,619 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:51,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 13:02:51,620 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash -228679181, now seen corresponding path program 1 times [2022-03-20 13:02:51,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:51,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715789069] [2022-03-20 13:02:51,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash -228679181, now seen corresponding path program 2 times [2022-03-20 13:02:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:51,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464983642] [2022-03-20 13:02:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:51,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464983642] [2022-03-20 13:02:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464983642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:51,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:51,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:51,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:51,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715789069] [2022-03-20 13:02:51,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715789069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:51,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:51,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285647059] [2022-03-20 13:02:51,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:51,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:02:51,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:02:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:02:51,684 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:51,895 INFO L93 Difference]: Finished difference Result 122 states and 183 transitions. [2022-03-20 13:02:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-20 13:02:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:51,899 INFO L225 Difference]: With dead ends: 122 [2022-03-20 13:02:51,899 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 13:02:51,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:02:51,903 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:51,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 13:02:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2022-03-20 13:02:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 38 states have call successors, (38), 7 states have call predecessors, (38), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 13:02:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 140 transitions. [2022-03-20 13:02:51,933 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 140 transitions. Word has length 15 [2022-03-20 13:02:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:51,933 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 140 transitions. [2022-03-20 13:02:51,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:02:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 140 transitions. [2022-03-20 13:02:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 13:02:51,934 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:51,937 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:51,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 13:02:51,938 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1266022048, now seen corresponding path program 1 times [2022-03-20 13:02:51,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:51,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559248138] [2022-03-20 13:02:51,941 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:51,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1266022048, now seen corresponding path program 2 times [2022-03-20 13:02:51,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:51,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186132780] [2022-03-20 13:02:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:51,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186132780] [2022-03-20 13:02:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186132780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:52,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559248138] [2022-03-20 13:02:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559248138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414485559] [2022-03-20 13:02:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:52,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:02:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:02:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:02:52,025 INFO L87 Difference]: Start difference. First operand 94 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:52,151 INFO L93 Difference]: Finished difference Result 100 states and 145 transitions. [2022-03-20 13:02:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:02:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 13:02:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:52,153 INFO L225 Difference]: With dead ends: 100 [2022-03-20 13:02:52,153 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 13:02:52,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:02:52,154 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:52,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 13:02:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-20 13:02:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 38 states have call successors, (38), 8 states have call predecessors, (38), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 13:02:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 143 transitions. [2022-03-20 13:02:52,183 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 143 transitions. Word has length 20 [2022-03-20 13:02:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:52,183 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 143 transitions. [2022-03-20 13:02:52,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 143 transitions. [2022-03-20 13:02:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 13:02:52,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:52,185 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:52,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 13:02:52,185 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash 884659585, now seen corresponding path program 1 times [2022-03-20 13:02:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10795755] [2022-03-20 13:02:52,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash 884659585, now seen corresponding path program 2 times [2022-03-20 13:02:52,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954933403] [2022-03-20 13:02:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:52,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:52,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954933403] [2022-03-20 13:02:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954933403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:52,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:52,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [10795755] [2022-03-20 13:02:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [10795755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550489728] [2022-03-20 13:02:52,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:52,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:02:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:02:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:02:52,267 INFO L87 Difference]: Start difference. First operand 98 states and 143 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:52,506 INFO L93 Difference]: Finished difference Result 131 states and 194 transitions. [2022-03-20 13:02:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 13:02:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:52,520 INFO L225 Difference]: With dead ends: 131 [2022-03-20 13:02:52,520 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 13:02:52,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:02:52,521 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:52,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 13:02:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2022-03-20 13:02:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 65 states have (on average 1.323076923076923) internal successors, (86), 66 states have internal predecessors, (86), 52 states have call successors, (52), 9 states have call predecessors, (52), 8 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 13:02:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-03-20 13:02:52,548 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 20 [2022-03-20 13:02:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:52,549 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-03-20 13:02:52,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-03-20 13:02:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 13:02:52,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:52,550 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:52,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 13:02:52,550 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:52,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1424204299, now seen corresponding path program 1 times [2022-03-20 13:02:52,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1984614255] [2022-03-20 13:02:52,551 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1424204299, now seen corresponding path program 2 times [2022-03-20 13:02:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:52,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641244800] [2022-03-20 13:02:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:52,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641244800] [2022-03-20 13:02:52,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641244800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:52,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1984614255] [2022-03-20 13:02:52,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1984614255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:52,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797661342] [2022-03-20 13:02:52,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:52,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:02:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:02:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:02:52,600 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:52,835 INFO L93 Difference]: Finished difference Result 188 states and 291 transitions. [2022-03-20 13:02:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:02:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 13:02:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:52,838 INFO L225 Difference]: With dead ends: 188 [2022-03-20 13:02:52,838 INFO L226 Difference]: Without dead ends: 186 [2022-03-20 13:02:52,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:02:52,839 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:52,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 65 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-20 13:02:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2022-03-20 13:02:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 81 states have internal predecessors, (101), 76 states have call successors, (76), 10 states have call predecessors, (76), 9 states have return successors, (75), 70 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-20 13:02:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 252 transitions. [2022-03-20 13:02:52,868 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 252 transitions. Word has length 20 [2022-03-20 13:02:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:52,869 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 252 transitions. [2022-03-20 13:02:52,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 252 transitions. [2022-03-20 13:02:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 13:02:52,870 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:52,870 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:52,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 13:02:52,870 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:52,871 INFO L85 PathProgramCache]: Analyzing trace with hash 297853571, now seen corresponding path program 1 times [2022-03-20 13:02:52,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556051378] [2022-03-20 13:02:52,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 297853571, now seen corresponding path program 2 times [2022-03-20 13:02:52,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88265681] [2022-03-20 13:02:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:52,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:02:52,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:52,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88265681] [2022-03-20 13:02:52,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88265681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:02:52,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:52,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556051378] [2022-03-20 13:02:52,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556051378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:52,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:52,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:02:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736388592] [2022-03-20 13:02:52,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:52,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 13:02:52,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 13:02:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 13:02:52,896 INFO L87 Difference]: Start difference. First operand 162 states and 252 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:53,024 INFO L93 Difference]: Finished difference Result 329 states and 524 transitions. [2022-03-20 13:02:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 13:02:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 13:02:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:53,027 INFO L225 Difference]: With dead ends: 329 [2022-03-20 13:02:53,027 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 13:02:53,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:02:53,030 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:53,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 13:02:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 209. [2022-03-20 13:02:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 101 states have internal predecessors, (129), 104 states have call successors, (104), 10 states have call predecessors, (104), 9 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 13:02:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 336 transitions. [2022-03-20 13:02:53,079 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 336 transitions. Word has length 20 [2022-03-20 13:02:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:53,080 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 336 transitions. [2022-03-20 13:02:53,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:02:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 336 transitions. [2022-03-20 13:02:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 13:02:53,080 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:53,080 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:53,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 13:02:53,081 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash 288094237, now seen corresponding path program 1 times [2022-03-20 13:02:53,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:53,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746668896] [2022-03-20 13:02:53,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 288094237, now seen corresponding path program 2 times [2022-03-20 13:02:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283149019] [2022-03-20 13:02:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:02:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:53,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283149019] [2022-03-20 13:02:53,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283149019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:53,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:53,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:53,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746668896] [2022-03-20 13:02:53,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746668896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:53,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:53,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899081990] [2022-03-20 13:02:53,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:53,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:02:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:02:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:02:53,162 INFO L87 Difference]: Start difference. First operand 209 states and 336 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:02:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:53,442 INFO L93 Difference]: Finished difference Result 275 states and 448 transitions. [2022-03-20 13:02:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-20 13:02:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:53,445 INFO L225 Difference]: With dead ends: 275 [2022-03-20 13:02:53,445 INFO L226 Difference]: Without dead ends: 273 [2022-03-20 13:02:53,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:02:53,445 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:53,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-20 13:02:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2022-03-20 13:02:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 124 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-03-20 13:02:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 405 transitions. [2022-03-20 13:02:53,485 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 405 transitions. Word has length 27 [2022-03-20 13:02:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:53,485 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 405 transitions. [2022-03-20 13:02:53,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:02:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 405 transitions. [2022-03-20 13:02:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 13:02:53,486 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:53,486 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:53,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 13:02:53,486 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash -870562259, now seen corresponding path program 1 times [2022-03-20 13:02:53,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:53,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190670398] [2022-03-20 13:02:53,487 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:53,487 INFO L85 PathProgramCache]: Analyzing trace with hash -870562259, now seen corresponding path program 2 times [2022-03-20 13:02:53,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:53,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830825728] [2022-03-20 13:02:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:53,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:02:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830825728] [2022-03-20 13:02:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830825728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:53,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:53,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:53,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190670398] [2022-03-20 13:02:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190670398] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:53,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:53,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887482059] [2022-03-20 13:02:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:53,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:02:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:02:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:02:53,520 INFO L87 Difference]: Start difference. First operand 249 states and 405 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:02:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:53,823 INFO L93 Difference]: Finished difference Result 593 states and 971 transitions. [2022-03-20 13:02:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:02:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 13:02:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:53,826 INFO L225 Difference]: With dead ends: 593 [2022-03-20 13:02:53,826 INFO L226 Difference]: Without dead ends: 396 [2022-03-20 13:02:53,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:02:53,828 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:53,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 53 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-20 13:02:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 250. [2022-03-20 13:02:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 115 states have (on average 1.373913043478261) internal successors, (158), 125 states have internal predecessors, (158), 124 states have call successors, (124), 11 states have call predecessors, (124), 10 states have return successors, (123), 113 states have call predecessors, (123), 123 states have call successors, (123) [2022-03-20 13:02:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 405 transitions. [2022-03-20 13:02:53,870 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 405 transitions. Word has length 29 [2022-03-20 13:02:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:53,871 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 405 transitions. [2022-03-20 13:02:53,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:02:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 405 transitions. [2022-03-20 13:02:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 13:02:53,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:53,871 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:53,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 13:02:53,872 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1319777776, now seen corresponding path program 1 times [2022-03-20 13:02:53,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409519808] [2022-03-20 13:02:53,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1319777776, now seen corresponding path program 2 times [2022-03-20 13:02:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:53,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397731860] [2022-03-20 13:02:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 13:02:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:02:53,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:53,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397731860] [2022-03-20 13:02:53,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397731860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:53,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:53,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:53,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409519808] [2022-03-20 13:02:53,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409519808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:53,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:53,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879682962] [2022-03-20 13:02:53,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:53,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:02:53,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:02:53,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:02:53,937 INFO L87 Difference]: Start difference. First operand 250 states and 405 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:02:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:54,180 INFO L93 Difference]: Finished difference Result 324 states and 521 transitions. [2022-03-20 13:02:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:02:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-20 13:02:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:54,183 INFO L225 Difference]: With dead ends: 324 [2022-03-20 13:02:54,183 INFO L226 Difference]: Without dead ends: 322 [2022-03-20 13:02:54,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:02:54,183 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:54,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 75 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-20 13:02:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 300. [2022-03-20 13:02:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 133 states have (on average 1.368421052631579) internal successors, (182), 149 states have internal predecessors, (182), 154 states have call successors, (154), 13 states have call predecessors, (154), 12 states have return successors, (153), 137 states have call predecessors, (153), 153 states have call successors, (153) [2022-03-20 13:02:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 489 transitions. [2022-03-20 13:02:54,228 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 489 transitions. Word has length 30 [2022-03-20 13:02:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:54,229 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 489 transitions. [2022-03-20 13:02:54,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:02:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 489 transitions. [2022-03-20 13:02:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:02:54,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:54,229 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:54,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 13:02:54,230 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1828949766, now seen corresponding path program 1 times [2022-03-20 13:02:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:54,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545028987] [2022-03-20 13:02:54,230 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:54,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1828949766, now seen corresponding path program 2 times [2022-03-20 13:02:54,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:54,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727491269] [2022-03-20 13:02:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:54,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:02:54,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727491269] [2022-03-20 13:02:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727491269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:54,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:54,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:54,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545028987] [2022-03-20 13:02:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545028987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:54,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:54,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738444439] [2022-03-20 13:02:54,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:54,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:02:54,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:02:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:02:54,300 INFO L87 Difference]: Start difference. First operand 300 states and 489 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:02:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:54,652 INFO L93 Difference]: Finished difference Result 470 states and 788 transitions. [2022-03-20 13:02:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-20 13:02:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:54,655 INFO L225 Difference]: With dead ends: 470 [2022-03-20 13:02:54,655 INFO L226 Difference]: Without dead ends: 468 [2022-03-20 13:02:54,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:02:54,656 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:54,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 76 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-03-20 13:02:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 422. [2022-03-20 13:02:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 179 states have (on average 1.4022346368715084) internal successors, (251), 206 states have internal predecessors, (251), 229 states have call successors, (229), 14 states have call predecessors, (229), 13 states have return successors, (228), 201 states have call predecessors, (228), 228 states have call successors, (228) [2022-03-20 13:02:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 708 transitions. [2022-03-20 13:02:54,729 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 708 transitions. Word has length 32 [2022-03-20 13:02:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:54,730 INFO L478 AbstractCegarLoop]: Abstraction has 422 states and 708 transitions. [2022-03-20 13:02:54,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:02:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 708 transitions. [2022-03-20 13:02:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 13:02:54,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:54,731 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:54,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 13:02:54,731 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1969498376, now seen corresponding path program 1 times [2022-03-20 13:02:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [672038734] [2022-03-20 13:02:54,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1969498376, now seen corresponding path program 2 times [2022-03-20 13:02:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397441692] [2022-03-20 13:02:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:02:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397441692] [2022-03-20 13:02:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397441692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:54,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:54,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [672038734] [2022-03-20 13:02:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [672038734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:54,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:54,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966675705] [2022-03-20 13:02:54,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:54,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:02:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:02:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:02:54,793 INFO L87 Difference]: Start difference. First operand 422 states and 708 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:02:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:55,094 INFO L93 Difference]: Finished difference Result 489 states and 817 transitions. [2022-03-20 13:02:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:02:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-20 13:02:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:55,098 INFO L225 Difference]: With dead ends: 489 [2022-03-20 13:02:55,098 INFO L226 Difference]: Without dead ends: 487 [2022-03-20 13:02:55,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:02:55,099 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:55,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-20 13:02:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 429. [2022-03-20 13:02:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 182 states have (on average 1.3956043956043955) internal successors, (254), 209 states have internal predecessors, (254), 232 states have call successors, (232), 15 states have call predecessors, (232), 14 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-20 13:02:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 717 transitions. [2022-03-20 13:02:55,176 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 717 transitions. Word has length 32 [2022-03-20 13:02:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:55,176 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 717 transitions. [2022-03-20 13:02:55,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:02:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 717 transitions. [2022-03-20 13:02:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:02:55,178 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:55,178 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-20 13:02:55,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 13:02:55,178 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash 154781133, now seen corresponding path program 1 times [2022-03-20 13:02:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124453829] [2022-03-20 13:02:55,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:02:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash 154781133, now seen corresponding path program 2 times [2022-03-20 13:02:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775335452] [2022-03-20 13:02:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 13:02:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 13:02:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 13:02:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 13:02:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775335452] [2022-03-20 13:02:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775335452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:55,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:55,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:55,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124453829] [2022-03-20 13:02:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124453829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:55,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:55,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124164066] [2022-03-20 13:02:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:55,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:02:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:02:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:02:55,248 INFO L87 Difference]: Start difference. First operand 429 states and 717 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 13:02:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:55,553 INFO L93 Difference]: Finished difference Result 484 states and 791 transitions. [2022-03-20 13:02:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 13:02:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:55,556 INFO L225 Difference]: With dead ends: 484 [2022-03-20 13:02:55,556 INFO L226 Difference]: Without dead ends: 482 [2022-03-20 13:02:55,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:02:55,556 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:55,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-03-20 13:02:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 433. [2022-03-20 13:02:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 185 states have (on average 1.3891891891891892) internal successors, (257), 212 states have internal predecessors, (257), 232 states have call successors, (232), 16 states have call predecessors, (232), 15 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-20 13:02:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 720 transitions. [2022-03-20 13:02:55,633 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 720 transitions. Word has length 42 [2022-03-20 13:02:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:55,634 INFO L478 AbstractCegarLoop]: Abstraction has 433 states and 720 transitions. [2022-03-20 13:02:55,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 13:02:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 720 transitions. [2022-03-20 13:02:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 13:02:55,635 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:55,635 INFO L499 BasicCegarLoop]: trace histogram [5, 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] [2022-03-20 13:02:55,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 13:02:55,635 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -756625364, now seen corresponding path program 1 times [2022-03-20 13:02:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:55,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392215162] [2022-03-20 13:02:55,636 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash -756625364, now seen corresponding path program 2 times [2022-03-20 13:02:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170821005] [2022-03-20 13:02:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:02:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:02:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 13:02:55,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:55,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170821005] [2022-03-20 13:02:55,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170821005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:55,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:55,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392215162] [2022-03-20 13:02:55,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392215162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:55,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841786299] [2022-03-20 13:02:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:55,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:02:55,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:02:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:02:55,692 INFO L87 Difference]: Start difference. First operand 433 states and 720 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:02:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:55,893 INFO L93 Difference]: Finished difference Result 440 states and 726 transitions. [2022-03-20 13:02:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:02:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-03-20 13:02:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:55,896 INFO L225 Difference]: With dead ends: 440 [2022-03-20 13:02:55,897 INFO L226 Difference]: Without dead ends: 438 [2022-03-20 13:02:55,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:02:55,897 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:55,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-20 13:02:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2022-03-20 13:02:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 188 states have (on average 1.3829787234042554) internal successors, (260), 215 states have internal predecessors, (260), 232 states have call successors, (232), 17 states have call predecessors, (232), 16 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-20 13:02:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 723 transitions. [2022-03-20 13:02:56,011 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 723 transitions. Word has length 42 [2022-03-20 13:02:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:56,011 INFO L478 AbstractCegarLoop]: Abstraction has 437 states and 723 transitions. [2022-03-20 13:02:56,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:02:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 723 transitions. [2022-03-20 13:02:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 13:02:56,012 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:56,012 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:56,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 13:02:56,013 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash 202086614, now seen corresponding path program 1 times [2022-03-20 13:02:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:56,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [428868206] [2022-03-20 13:02:56,014 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 202086614, now seen corresponding path program 2 times [2022-03-20 13:02:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:56,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238986405] [2022-03-20 13:02:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:02:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:02:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:02:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:02:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 13:02:56,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:56,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238986405] [2022-03-20 13:02:56,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238986405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:56,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:56,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:56,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:56,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [428868206] [2022-03-20 13:02:56,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [428868206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:56,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:56,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:02:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627316906] [2022-03-20 13:02:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:56,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:02:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:02:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:02:56,066 INFO L87 Difference]: Start difference. First operand 437 states and 723 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 13:02:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:56,345 INFO L93 Difference]: Finished difference Result 501 states and 826 transitions. [2022-03-20 13:02:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:02:56,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2022-03-20 13:02:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:56,349 INFO L225 Difference]: With dead ends: 501 [2022-03-20 13:02:56,349 INFO L226 Difference]: Without dead ends: 499 [2022-03-20 13:02:56,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:02:56,349 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:56,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 66 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-20 13:02:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 441. [2022-03-20 13:02:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 191 states have (on average 1.3769633507853403) internal successors, (263), 218 states have internal predecessors, (263), 232 states have call successors, (232), 18 states have call predecessors, (232), 17 states have return successors, (231), 204 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-20 13:02:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 726 transitions. [2022-03-20 13:02:56,438 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 726 transitions. Word has length 54 [2022-03-20 13:02:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:56,439 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 726 transitions. [2022-03-20 13:02:56,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 13:02:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 726 transitions. [2022-03-20 13:02:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 13:02:56,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:56,440 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:56,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 13:02:56,440 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash -667500302, now seen corresponding path program 1 times [2022-03-20 13:02:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:56,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522364647] [2022-03-20 13:02:56,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:56,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:02:56,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash -667500302, now seen corresponding path program 2 times [2022-03-20 13:02:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:56,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557413868] [2022-03-20 13:02:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 13:02:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 13:02:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 13:02:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:02:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 13:02:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 13:02:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 13:02:56,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557413868] [2022-03-20 13:02:56,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557413868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303174161] [2022-03-20 13:02:56,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:56,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:56,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:56,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:02:56,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:56,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:02:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 13:02:56,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:02:56,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303174161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:56,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:02:56,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-03-20 13:02:56,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:56,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522364647] [2022-03-20 13:02:56,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522364647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:56,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:56,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:02:56,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805157317] [2022-03-20 13:02:56,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:56,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:02:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:02:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:02:56,889 INFO L87 Difference]: Start difference. First operand 441 states and 726 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 13:02:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:57,092 INFO L93 Difference]: Finished difference Result 843 states and 1374 transitions. [2022-03-20 13:02:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:02:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-20 13:02:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:57,095 INFO L225 Difference]: With dead ends: 843 [2022-03-20 13:02:57,095 INFO L226 Difference]: Without dead ends: 437 [2022-03-20 13:02:57,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:02:57,097 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:57,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-03-20 13:02:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 401. [2022-03-20 13:02:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 183 states have (on average 1.3387978142076502) internal successors, (245), 203 states have internal predecessors, (245), 200 states have call successors, (200), 18 states have call predecessors, (200), 17 states have return successors, (199), 179 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-20 13:02:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 644 transitions. [2022-03-20 13:02:57,228 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 644 transitions. Word has length 62 [2022-03-20 13:02:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:57,228 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 644 transitions. [2022-03-20 13:02:57,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 13:02:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 644 transitions. [2022-03-20 13:02:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 13:02:57,230 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:57,230 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 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] [2022-03-20 13:02:57,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 13:02:57,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:02:57,444 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:57,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1858540084, now seen corresponding path program 1 times [2022-03-20 13:02:57,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:57,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929743792] [2022-03-20 13:02:57,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:57,454 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:02:57,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1858540084, now seen corresponding path program 2 times [2022-03-20 13:02:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:57,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053691029] [2022-03-20 13:02:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 13:02:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 13:02:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 13:02:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:02:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 13:02:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 13:02:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:02:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 13:02:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 13:02:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 13:02:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053691029] [2022-03-20 13:02:57,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053691029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606393877] [2022-03-20 13:02:57,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:57,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:57,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:57,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:57,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:02:57,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:57,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:57,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:02:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-20 13:02:57,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:02:57,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606393877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:57,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:02:57,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-03-20 13:02:57,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:57,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929743792] [2022-03-20 13:02:57,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929743792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:57,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:57,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:02:57,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184238328] [2022-03-20 13:02:57,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:57,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:02:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:02:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:02:57,955 INFO L87 Difference]: Start difference. First operand 401 states and 644 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 13:02:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:58,282 INFO L93 Difference]: Finished difference Result 714 states and 1123 transitions. [2022-03-20 13:02:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:02:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-03-20 13:02:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:58,285 INFO L225 Difference]: With dead ends: 714 [2022-03-20 13:02:58,285 INFO L226 Difference]: Without dead ends: 329 [2022-03-20 13:02:58,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:02:58,287 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 45 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:58,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 264 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:02:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-20 13:02:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 295. [2022-03-20 13:02:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 142 states have (on average 1.2887323943661972) internal successors, (183), 154 states have internal predecessors, (183), 136 states have call successors, (136), 17 states have call predecessors, (136), 16 states have return successors, (135), 123 states have call predecessors, (135), 135 states have call successors, (135) [2022-03-20 13:02:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2022-03-20 13:02:58,384 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 84 [2022-03-20 13:02:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:58,384 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2022-03-20 13:02:58,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 13:02:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2022-03-20 13:02:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 13:02:58,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:58,385 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 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] [2022-03-20 13:02:58,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 13:02:58,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:02:58,602 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash -898087182, now seen corresponding path program 1 times [2022-03-20 13:02:58,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:58,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [900898605] [2022-03-20 13:02:58,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:58,612 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:02:58,612 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -898087182, now seen corresponding path program 2 times [2022-03-20 13:02:58,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62914176] [2022-03-20 13:02:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:58,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 13:02:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 13:02:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 13:02:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:02:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 13:02:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 13:02:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 13:02:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:02:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 13:02:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 13:02:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 13:02:58,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62914176] [2022-03-20 13:02:58,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62914176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396023321] [2022-03-20 13:02:58,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:58,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:58,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:58,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:58,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:02:58,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:58,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:02:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-03-20 13:02:59,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:02:59,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396023321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:59,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:02:59,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-03-20 13:02:59,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [900898605] [2022-03-20 13:02:59,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [900898605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:59,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:59,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:02:59,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154949612] [2022-03-20 13:02:59,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:59,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:02:59,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:02:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:02:59,075 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 13:02:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:59,240 INFO L93 Difference]: Finished difference Result 549 states and 838 transitions. [2022-03-20 13:02:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:02:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-03-20 13:02:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:59,242 INFO L225 Difference]: With dead ends: 549 [2022-03-20 13:02:59,242 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 13:02:59,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:02:59,244 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:59,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 218 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:02:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 13:02:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 238. [2022-03-20 13:02:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 117 states have (on average 1.2564102564102564) internal successors, (147), 127 states have internal predecessors, (147), 104 states have call successors, (104), 17 states have call predecessors, (104), 16 states have return successors, (103), 93 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 13:02:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 354 transitions. [2022-03-20 13:02:59,307 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 354 transitions. Word has length 84 [2022-03-20 13:02:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:59,307 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 354 transitions. [2022-03-20 13:02:59,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 13:02:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 354 transitions. [2022-03-20 13:02:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 13:02:59,308 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:59,309 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1] [2022-03-20 13:02:59,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:59,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:59,526 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash -560912485, now seen corresponding path program 1 times [2022-03-20 13:02:59,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206818760] [2022-03-20 13:02:59,527 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash -560912485, now seen corresponding path program 2 times [2022-03-20 13:02:59,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:59,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757534678] [2022-03-20 13:02:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:02:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:02:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:02:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:02:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:02:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:02:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 13:02:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 13:02:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:02:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:02:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 13:02:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 13:02:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:02:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:02:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:02:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 13:02:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 13:02:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757534678] [2022-03-20 13:02:59,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757534678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:59,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847940637] [2022-03-20 13:02:59,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:59,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:59,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:02:59,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:02:59,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:59,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:02:59,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-03-20 13:03:00,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 13:03:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847940637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:00,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:00,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-03-20 13:03:00,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:00,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206818760] [2022-03-20 13:03:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206818760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:00,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:03:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858238937] [2022-03-20 13:03:00,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:00,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:03:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:03:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:03:00,499 INFO L87 Difference]: Start difference. First operand 238 states and 354 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 13:03:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:01,059 INFO L93 Difference]: Finished difference Result 350 states and 539 transitions. [2022-03-20 13:03:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:03:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 111 [2022-03-20 13:03:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:01,061 INFO L225 Difference]: With dead ends: 350 [2022-03-20 13:03:01,061 INFO L226 Difference]: Without dead ends: 348 [2022-03-20 13:03:01,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:03:01,062 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:01,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 98 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-20 13:03:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 294. [2022-03-20 13:03:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 142 states have (on average 1.295774647887324) internal successors, (184), 156 states have internal predecessors, (184), 134 states have call successors, (134), 18 states have call predecessors, (134), 17 states have return successors, (133), 119 states have call predecessors, (133), 133 states have call successors, (133) [2022-03-20 13:03:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 451 transitions. [2022-03-20 13:03:01,136 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 451 transitions. Word has length 111 [2022-03-20 13:03:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:01,136 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 451 transitions. [2022-03-20 13:03:01,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-20 13:03:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 451 transitions. [2022-03-20 13:03:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 13:03:01,137 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:01,137 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1] [2022-03-20 13:03:01,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:01,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:01,351 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash 977427545, now seen corresponding path program 1 times [2022-03-20 13:03:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:01,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281714946] [2022-03-20 13:03:01,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 977427545, now seen corresponding path program 2 times [2022-03-20 13:03:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791424381] [2022-03-20 13:03:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:03:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:03:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:03:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:03:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:03:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:03:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 13:03:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 13:03:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:03:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:03:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 13:03:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 13:03:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:03:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:03:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:03:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 13:03:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 13:03:01,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:01,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791424381] [2022-03-20 13:03:01,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791424381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:01,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811037107] [2022-03-20 13:03:01,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:01,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:01,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:01,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:03:01,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 13:03:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 13:03:01,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 13:03:02,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811037107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:02,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:02,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-20 13:03:02,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281714946] [2022-03-20 13:03:02,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281714946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:02,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:02,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:03:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627213663] [2022-03-20 13:03:02,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:02,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:03:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:03:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:03:02,133 INFO L87 Difference]: Start difference. First operand 294 states and 451 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 13:03:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:02,532 INFO L93 Difference]: Finished difference Result 323 states and 492 transitions. [2022-03-20 13:03:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:03:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 111 [2022-03-20 13:03:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:02,534 INFO L225 Difference]: With dead ends: 323 [2022-03-20 13:03:02,534 INFO L226 Difference]: Without dead ends: 321 [2022-03-20 13:03:02,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:03:02,535 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:02,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-20 13:03:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2022-03-20 13:03:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 120 states have (on average 1.25) internal successors, (150), 130 states have internal predecessors, (150), 104 states have call successors, (104), 18 states have call predecessors, (104), 17 states have return successors, (103), 93 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 13:03:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2022-03-20 13:03:02,602 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 111 [2022-03-20 13:03:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:02,603 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2022-03-20 13:03:02,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 13:03:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2022-03-20 13:03:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 13:03:02,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:02,605 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-03-20 13:03:02,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 13:03:02,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:02,820 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1099325000, now seen corresponding path program 3 times [2022-03-20 13:03:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:02,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117740301] [2022-03-20 13:03:02,820 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1099325000, now seen corresponding path program 4 times [2022-03-20 13:03:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:02,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55775427] [2022-03-20 13:03:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:02,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:03:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:03:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:03:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:03:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:03:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:03:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 13:03:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 13:03:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:03:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:03:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 13:03:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 13:03:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:03:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:03:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:03:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 13:03:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-20 13:03:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 13:03:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55775427] [2022-03-20 13:03:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55775427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620763341] [2022-03-20 13:03:02,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:02,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:02,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:02,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:02,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:03:02,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:03:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 210 proven. 7 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-03-20 13:03:03,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 13:03:03,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620763341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:03,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:03,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-20 13:03:03,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:03,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117740301] [2022-03-20 13:03:03,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117740301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:03,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:03,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:03:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830920722] [2022-03-20 13:03:03,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:03,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:03:03,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:03:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:03:03,531 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 13:03:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:04,566 INFO L93 Difference]: Finished difference Result 756 states and 1173 transitions. [2022-03-20 13:03:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:03:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 116 [2022-03-20 13:03:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:04,572 INFO L225 Difference]: With dead ends: 756 [2022-03-20 13:03:04,572 INFO L226 Difference]: Without dead ends: 452 [2022-03-20 13:03:04,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:03:04,573 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 215 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:04,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 110 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:03:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-20 13:03:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 364. [2022-03-20 13:03:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 169 states have (on average 1.2781065088757397) internal successors, (216), 183 states have internal predecessors, (216), 177 states have call successors, (177), 18 states have call predecessors, (177), 17 states have return successors, (176), 162 states have call predecessors, (176), 176 states have call successors, (176) [2022-03-20 13:03:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 569 transitions. [2022-03-20 13:03:04,642 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 569 transitions. Word has length 116 [2022-03-20 13:03:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:04,642 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 569 transitions. [2022-03-20 13:03:04,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 6 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-20 13:03:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 569 transitions. [2022-03-20 13:03:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 13:03:04,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:04,644 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-03-20 13:03:04,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:04,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:04,860 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1934725046, now seen corresponding path program 3 times [2022-03-20 13:03:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:04,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928419915] [2022-03-20 13:03:04,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1934725046, now seen corresponding path program 4 times [2022-03-20 13:03:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096638386] [2022-03-20 13:03:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:03:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:03:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:03:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:03:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:03:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:03:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 13:03:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 13:03:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:03:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:03:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 13:03:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 13:03:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:03:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:03:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:03:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 13:03:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-20 13:03:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 13:03:04,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096638386] [2022-03-20 13:03:04,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096638386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585458223] [2022-03-20 13:03:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:04,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:04,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:03:05,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 13:03:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 37 proven. 66 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-20 13:03:05,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 37 proven. 66 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-20 13:03:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585458223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:05,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:05,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-20 13:03:05,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:05,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928419915] [2022-03-20 13:03:05,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928419915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:05,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:05,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:03:05,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63361272] [2022-03-20 13:03:05,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:05,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:03:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:05,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:03:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:03:05,667 INFO L87 Difference]: Start difference. First operand 364 states and 569 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-20 13:03:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:06,560 INFO L93 Difference]: Finished difference Result 620 states and 983 transitions. [2022-03-20 13:03:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:03:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2022-03-20 13:03:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:06,564 INFO L225 Difference]: With dead ends: 620 [2022-03-20 13:03:06,564 INFO L226 Difference]: Without dead ends: 618 [2022-03-20 13:03:06,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:03:06,565 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 187 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:06,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 89 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:03:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-20 13:03:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 501. [2022-03-20 13:03:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 228 states have (on average 1.3114035087719298) internal successors, (299), 250 states have internal predecessors, (299), 250 states have call successors, (250), 23 states have call predecessors, (250), 22 states have return successors, (249), 227 states have call predecessors, (249), 249 states have call successors, (249) [2022-03-20 13:03:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 798 transitions. [2022-03-20 13:03:06,705 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 798 transitions. Word has length 116 [2022-03-20 13:03:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:06,705 INFO L478 AbstractCegarLoop]: Abstraction has 501 states and 798 transitions. [2022-03-20 13:03:06,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-03-20 13:03:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 798 transitions. [2022-03-20 13:03:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 13:03:06,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:06,707 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-03-20 13:03:06,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:06,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:06,921 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1563563510, now seen corresponding path program 5 times [2022-03-20 13:03:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:06,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368861048] [2022-03-20 13:03:06,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1563563510, now seen corresponding path program 6 times [2022-03-20 13:03:06,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:06,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274692784] [2022-03-20 13:03:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:03:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:03:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 13:03:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 13:03:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 13:03:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:03:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 13:03:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 13:03:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:03:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:03:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 13:03:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-20 13:03:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:03:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:03:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 13:03:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-20 13:03:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 13:03:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-20 13:03:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-20 13:03:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 13:03:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-20 13:03:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 13:03:07,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:07,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274692784] [2022-03-20 13:03:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274692784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:07,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214104299] [2022-03-20 13:03:07,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:07,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:07,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:07,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:03:07,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:03:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:03:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 56 proven. 12 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 13:03:07,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 13:03:07,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214104299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:07,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:07,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-20 13:03:07,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:07,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368861048] [2022-03-20 13:03:07,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368861048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:07,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:07,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:03:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175758558] [2022-03-20 13:03:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:07,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:03:07,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:03:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-20 13:03:07,802 INFO L87 Difference]: Start difference. First operand 501 states and 798 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-03-20 13:03:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:08,738 INFO L93 Difference]: Finished difference Result 770 states and 1246 transitions. [2022-03-20 13:03:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:03:08,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 138 [2022-03-20 13:03:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:08,741 INFO L225 Difference]: With dead ends: 770 [2022-03-20 13:03:08,741 INFO L226 Difference]: Without dead ends: 309 [2022-03-20 13:03:08,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:03:08,742 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:08,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 105 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:03:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-20 13:03:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 213. [2022-03-20 13:03:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 124 states have internal predecessors, (137), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-20 13:03:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 280 transitions. [2022-03-20 13:03:08,791 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 280 transitions. Word has length 138 [2022-03-20 13:03:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:08,791 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 280 transitions. [2022-03-20 13:03:08,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-03-20 13:03:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 280 transitions. [2022-03-20 13:03:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 13:03:08,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:08,792 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:08,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:09,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-20 13:03:09,009 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -915763573, now seen corresponding path program 1 times [2022-03-20 13:03:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:09,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1750956912] [2022-03-20 13:03:09,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -915763573, now seen corresponding path program 2 times [2022-03-20 13:03:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:09,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214114055] [2022-03-20 13:03:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:03:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:03:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:03:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:03:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:03:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:03:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 13:03:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 13:03:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:03:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:03:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 13:03:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 13:03:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:03:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:03:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:03:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 13:03:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-20 13:03:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-20 13:03:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-20 13:03:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 13:03:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-20 13:03:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-20 13:03:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 13:03:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-20 13:03:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-20 13:03:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-20 13:03:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-20 13:03:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 74 proven. 32 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-20 13:03:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214114055] [2022-03-20 13:03:09,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214114055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:09,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057616393] [2022-03-20 13:03:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:09,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:09,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:09,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:03:09,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:03:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 794 proven. 8 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-03-20 13:03:09,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-03-20 13:03:09,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057616393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:09,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:09,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-03-20 13:03:09,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:09,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1750956912] [2022-03-20 13:03:09,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1750956912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:09,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:09,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:03:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552595306] [2022-03-20 13:03:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:09,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:03:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:03:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:03:09,940 INFO L87 Difference]: Start difference. First operand 213 states and 280 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 7 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-03-20 13:03:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:10,565 INFO L93 Difference]: Finished difference Result 399 states and 535 transitions. [2022-03-20 13:03:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:03:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 7 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 173 [2022-03-20 13:03:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:10,566 INFO L225 Difference]: With dead ends: 399 [2022-03-20 13:03:10,567 INFO L226 Difference]: Without dead ends: 246 [2022-03-20 13:03:10,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:03:10,568 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:10,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 104 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:03:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-20 13:03:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 211. [2022-03-20 13:03:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 124 states have internal predecessors, (137), 70 states have call successors, (70), 23 states have call predecessors, (70), 22 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 13:03:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2022-03-20 13:03:10,617 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 173 [2022-03-20 13:03:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:10,617 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2022-03-20 13:03:10,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 7 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-03-20 13:03:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2022-03-20 13:03:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 13:03:10,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:10,619 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:10,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:10,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 13:03:10,831 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 345153677, now seen corresponding path program 5 times [2022-03-20 13:03:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:10,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1391512833] [2022-03-20 13:03:10,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 345153677, now seen corresponding path program 6 times [2022-03-20 13:03:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:10,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610139497] [2022-03-20 13:03:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:03:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 13:03:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 13:03:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 13:03:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 13:03:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 13:03:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 13:03:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-20 13:03:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 13:03:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 13:03:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 13:03:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 13:03:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 13:03:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-20 13:03:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 13:03:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 13:03:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-20 13:03:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-20 13:03:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-20 13:03:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 13:03:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-20 13:03:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-20 13:03:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-20 13:03:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-20 13:03:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-20 13:03:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-20 13:03:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-20 13:03:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-03-20 13:03:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610139497] [2022-03-20 13:03:10,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610139497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340065530] [2022-03-20 13:03:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:10,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:10,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:03:10,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:03:11,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 13:03:11,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:03:11,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 69 proven. 19 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2022-03-20 13:03:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2022-03-20 13:03:11,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340065530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:11,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:11,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:03:11,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1391512833] [2022-03-20 13:03:11,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1391512833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:11,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:11,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:03:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150527555] [2022-03-20 13:03:11,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:11,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:03:11,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:03:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:03:11,783 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2022-03-20 13:03:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:12,176 INFO L93 Difference]: Finished difference Result 318 states and 407 transitions. [2022-03-20 13:03:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:03:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 173 [2022-03-20 13:03:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:12,177 INFO L225 Difference]: With dead ends: 318 [2022-03-20 13:03:12,177 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 13:03:12,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-20 13:03:12,179 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:12,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 60 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:03:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 13:03:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 13:03:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 13:03:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 13:03:12,181 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2022-03-20 13:03:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:12,181 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 13:03:12,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2022-03-20 13:03:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 13:03:12,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 13:03:12,184 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 13:03:12,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:12,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 13:03:12,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 13:04:28,873 WARN L232 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 395 DAG size of output: 395 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)