/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:21:44,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:21:44,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:21:44,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:21:44,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:21:44,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:21:44,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:21:44,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:21:44,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:21:44,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:21:44,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:21:44,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:21:44,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:21:44,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:21:44,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:21:44,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:21:44,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:21:44,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:21:44,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:21:44,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:21:44,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:21:44,565 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:21:44,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:21:44,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:21:44,567 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:21:44,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:21:44,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:21:44,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:21:44,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:21:44,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:21:44,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:21:44,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:21:44,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:21:44,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:21:44,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:21:44,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:21:44,571 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:21:44,571 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:21:44,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:21:44,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:21:44,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:21:44,808 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:21:44,808 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:21:44,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-14 21:21:44,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ecb605f/65425838df3c40f28ec98361aaa055b9/FLAG3a94f0ee2 [2022-02-14 21:21:45,192 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:21:45,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-02-14 21:21:45,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ecb605f/65425838df3c40f28ec98361aaa055b9/FLAG3a94f0ee2 [2022-02-14 21:21:45,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ecb605f/65425838df3c40f28ec98361aaa055b9 [2022-02-14 21:21:45,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:21:45,213 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:21:45,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:21:45,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:21:45,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:21:45,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3dcb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45, skipping insertion in model container [2022-02-14 21:21:45,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:21:45,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:21:45,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-02-14 21:21:45,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:21:45,405 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:21:45,411 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2022-02-14 21:21:45,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:21:45,420 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:21:45,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45 WrapperNode [2022-02-14 21:21:45,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:21:45,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:21:45,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:21:45,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:21:45,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:21:45,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:21:45,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:21:45,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:21:45,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:21:45,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:45,468 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) [2022-02-14 21:21:45,490 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 [2022-02-14 21:21:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:21:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:21:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:21:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:21:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:21:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:21:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:21:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:21:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:21:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:21:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:21:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:21:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:21:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:21:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:21:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:21:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:21:45,557 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:21:45,558 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:21:45,671 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:21:45,674 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:21:45,675 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 21:21:45,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:21:45 BoogieIcfgContainer [2022-02-14 21:21:45,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:21:45,676 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:21:45,676 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:21:45,677 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:21:45,679 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:21:45" (1/1) ... [2022-02-14 21:21:45,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:21:45 BasicIcfg [2022-02-14 21:21:45,687 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:21:45,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:21:45,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:21:45,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:21:45,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:21:45" (1/4) ... [2022-02-14 21:21:45,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ff6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:21:45, skipping insertion in model container [2022-02-14 21:21:45,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:21:45" (2/4) ... [2022-02-14 21:21:45,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ff6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:21:45, skipping insertion in model container [2022-02-14 21:21:45,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:21:45" (3/4) ... [2022-02-14 21:21:45,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ff6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:21:45, skipping insertion in model container [2022-02-14 21:21:45,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:21:45" (4/4) ... [2022-02-14 21:21:45,702 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.cJordan [2022-02-14 21:21:45,721 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:21:45,722 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:21:45,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:21:45,799 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 21:21:45,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:21:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:21:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:21:45,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:45,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:45,816 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1381876426, now seen corresponding path program 1 times [2022-02-14 21:21:45,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:45,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007690366] [2022-02-14 21:21:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:45,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:21:45,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:45,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007690366] [2022-02-14 21:21:45,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007690366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:21:45,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:21:45,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:21:45,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094456447] [2022-02-14 21:21:45,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:21:46,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:21:46,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:21:46,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:21:46,025 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-14 21:21:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:46,057 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-02-14 21:21:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:21:46,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-02-14 21:21:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:46,064 INFO L225 Difference]: With dead ends: 22 [2022-02-14 21:21:46,064 INFO L226 Difference]: Without dead ends: 15 [2022-02-14 21:21:46,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:21:46,068 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:46,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:21:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-14 21:21:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-14 21:21:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-02-14 21:21:46,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-02-14 21:21:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:46,094 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-02-14 21:21:46,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-02-14 21:21:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-02-14 21:21:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:21:46,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:46,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:46,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:21:46,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1382799947, now seen corresponding path program 1 times [2022-02-14 21:21:46,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:46,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363569756] [2022-02-14 21:21:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:21:46,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:46,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363569756] [2022-02-14 21:21:46,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363569756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:21:46,184 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:21:46,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:21:46,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610594316] [2022-02-14 21:21:46,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:21:46,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:21:46,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:21:46,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:21:46,187 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-14 21:21:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:46,227 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-02-14 21:21:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:21:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-02-14 21:21:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:46,228 INFO L225 Difference]: With dead ends: 17 [2022-02-14 21:21:46,228 INFO L226 Difference]: Without dead ends: 17 [2022-02-14 21:21:46,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:21:46,233 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:46,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:21:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-14 21:21:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-14 21:21:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-14 21:21:46,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-14 21:21:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:46,241 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-14 21:21:46,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-02-14 21:21:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-14 21:21:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 21:21:46,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:46,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:46,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:21:46,245 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:46,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1658763799, now seen corresponding path program 1 times [2022-02-14 21:21:46,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:46,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50858662] [2022-02-14 21:21:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:21:46,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:46,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50858662] [2022-02-14 21:21:46,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50858662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:46,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960586695] [2022-02-14 21:21:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:46,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:46,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:46,313 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) [2022-02-14 21:21:46,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:21:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 21:21:46,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:21:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:21:46,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960586695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:46,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:46,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-14 21:21:46,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929594118] [2022-02-14 21:21:46,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:46,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 21:21:46,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 21:21:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-14 21:21:46,440 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:46,513 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-02-14 21:21:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 21:21:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-14 21:21:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:46,515 INFO L225 Difference]: With dead ends: 23 [2022-02-14 21:21:46,515 INFO L226 Difference]: Without dead ends: 23 [2022-02-14 21:21:46,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:21:46,516 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:46,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:21:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-14 21:21:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-02-14 21:21:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-14 21:21:46,519 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-02-14 21:21:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:46,519 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-14 21:21:46,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-14 21:21:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-14 21:21:46,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:46,520 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:46,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:46,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:46,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1581176064, now seen corresponding path program 1 times [2022-02-14 21:21:46,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:46,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57372740] [2022-02-14 21:21:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 21:21:46,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:46,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57372740] [2022-02-14 21:21:46,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57372740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:21:46,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:21:46,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:21:46,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017077548] [2022-02-14 21:21:46,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:21:46,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:21:46,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:46,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:21:46,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:21:46,772 INFO L87 Difference]: Start difference. First operand 21 states and 23 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, (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) [2022-02-14 21:21:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:46,794 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-02-14 21:21:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:21:46,794 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, (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 19 [2022-02-14 21:21:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:46,795 INFO L225 Difference]: With dead ends: 24 [2022-02-14 21:21:46,795 INFO L226 Difference]: Without dead ends: 24 [2022-02-14 21:21:46,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:21:46,796 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:46,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:21:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-14 21:21:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-14 21:21:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-14 21:21:46,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-02-14 21:21:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:46,799 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-14 21:21:46,799 INFO L471 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, (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) [2022-02-14 21:21:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-14 21:21:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 21:21:46,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:46,800 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:46,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 21:21:46,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 76189880, now seen corresponding path program 1 times [2022-02-14 21:21:46,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:46,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266799037] [2022-02-14 21:21:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:46,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:46,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:46,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266799037] [2022-02-14 21:21:46,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266799037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:46,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734538508] [2022-02-14 21:21:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:46,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:46,863 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) [2022-02-14 21:21:46,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:21:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 21:21:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:46,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:46,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734538508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:46,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:46,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-14 21:21:46,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570680771] [2022-02-14 21:21:46,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:46,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 21:21:46,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 21:21:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-14 21:21:46,994 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:47,067 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-02-14 21:21:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 21:21:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-14 21:21:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:47,068 INFO L225 Difference]: With dead ends: 32 [2022-02-14 21:21:47,068 INFO L226 Difference]: Without dead ends: 32 [2022-02-14 21:21:47,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-02-14 21:21:47,069 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:47,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:21:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-14 21:21:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-14 21:21:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-14 21:21:47,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2022-02-14 21:21:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:47,072 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-14 21:21:47,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-14 21:21:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-14 21:21:47,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:47,073 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:47,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:47,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:47,290 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash 200191536, now seen corresponding path program 2 times [2022-02-14 21:21:47,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:47,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312469977] [2022-02-14 21:21:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:47,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:47,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:47,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:47,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312469977] [2022-02-14 21:21:47,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312469977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:47,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111761136] [2022-02-14 21:21:47,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:21:47,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:47,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:47,363 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) [2022-02-14 21:21:47,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:21:47,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:21:47,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:21:47,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 21:21:47,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:47,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:47,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111761136] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:47,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:47,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-14 21:21:47,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72599529] [2022-02-14 21:21:47,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:47,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 21:21:47,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 21:21:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-14 21:21:47,583 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:47,758 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-02-14 21:21:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 21:21:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-14 21:21:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:47,759 INFO L225 Difference]: With dead ends: 48 [2022-02-14 21:21:47,759 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 21:21:47,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-02-14 21:21:47,760 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:47,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 27 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:21:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 21:21:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-14 21:21:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-02-14 21:21:47,764 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 31 [2022-02-14 21:21:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:47,764 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-02-14 21:21:47,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-02-14 21:21:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 21:21:47,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:47,765 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:47,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:47,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:47,983 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2099511584, now seen corresponding path program 3 times [2022-02-14 21:21:47,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:47,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395023724] [2022-02-14 21:21:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 21:21:48,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:48,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395023724] [2022-02-14 21:21:48,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395023724] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:48,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631194702] [2022-02-14 21:21:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:21:48,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:48,195 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) [2022-02-14 21:21:48,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:21:48,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 21:21:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:21:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 21:21:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-02-14 21:21:48,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-02-14 21:21:48,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631194702] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:48,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:48,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 7] total 25 [2022-02-14 21:21:48,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964061185] [2022-02-14 21:21:48,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:48,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-14 21:21:48,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-14 21:21:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2022-02-14 21:21:48,459 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:48,816 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-02-14 21:21:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 21:21:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-14 21:21:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:48,817 INFO L225 Difference]: With dead ends: 65 [2022-02-14 21:21:48,817 INFO L226 Difference]: Without dead ends: 62 [2022-02-14 21:21:48,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=653, Invalid=1509, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 21:21:48,818 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:48,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 47 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:21:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-14 21:21:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-14 21:21:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-02-14 21:21:48,822 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2022-02-14 21:21:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:48,822 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-02-14 21:21:48,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-02-14 21:21:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-14 21:21:48,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:48,823 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:48,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-14 21:21:49,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:49,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash 75572905, now seen corresponding path program 4 times [2022-02-14 21:21:49,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:49,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805877787] [2022-02-14 21:21:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:49,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:21:49,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:49,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805877787] [2022-02-14 21:21:49,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805877787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:49,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865797918] [2022-02-14 21:21:49,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 21:21:49,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:49,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:49,277 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) [2022-02-14 21:21:49,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:21:49,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 21:21:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:21:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 21:21:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:21:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:21:49,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865797918] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:49,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:49,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-02-14 21:21:49,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727143485] [2022-02-14 21:21:49,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:49,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-14 21:21:49,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-14 21:21:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 21:21:49,765 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:50,294 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-02-14 21:21:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-14 21:21:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-14 21:21:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:50,295 INFO L225 Difference]: With dead ends: 96 [2022-02-14 21:21:50,295 INFO L226 Difference]: Without dead ends: 96 [2022-02-14 21:21:50,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 21:21:50,297 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:50,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:21:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-14 21:21:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-02-14 21:21:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-02-14 21:21:50,301 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 61 [2022-02-14 21:21:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:50,301 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-02-14 21:21:50,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-02-14 21:21:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-14 21:21:50,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:50,303 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:50,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:50,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:50,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 377058471, now seen corresponding path program 5 times [2022-02-14 21:21:50,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:50,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548980255] [2022-02-14 21:21:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:50,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:50,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 21:21:50,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:50,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548980255] [2022-02-14 21:21:50,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548980255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:50,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665118453] [2022-02-14 21:21:50,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 21:21:50,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:50,950 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) [2022-02-14 21:21:50,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:21:50,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-02-14 21:21:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:21:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 21:21:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-14 21:21:51,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-02-14 21:21:52,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665118453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:52,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:52,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17, 17] total 66 [2022-02-14 21:21:52,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377479783] [2022-02-14 21:21:52,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:52,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-14 21:21:52,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-14 21:21:52,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-02-14 21:21:52,114 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:53,926 INFO L93 Difference]: Finished difference Result 214 states and 252 transitions. [2022-02-14 21:21:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-14 21:21:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-14 21:21:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:53,929 INFO L225 Difference]: With dead ends: 214 [2022-02-14 21:21:53,929 INFO L226 Difference]: Without dead ends: 214 [2022-02-14 21:21:53,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-02-14 21:21:53,933 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 279 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:53,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 55 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 21:21:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-14 21:21:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-02-14 21:21:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.186602870813397) internal successors, (248), 209 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2022-02-14 21:21:53,942 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 252 transitions. Word has length 95 [2022-02-14 21:21:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:53,942 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 252 transitions. [2022-02-14 21:21:53,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 65 states have internal predecessors, (150), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 252 transitions. [2022-02-14 21:21:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-14 21:21:53,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:53,944 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:53,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 21:21:54,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:54,162 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:54,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1709022179, now seen corresponding path program 6 times [2022-02-14 21:21:54,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:54,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359122444] [2022-02-14 21:21:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:54,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-02-14 21:21:54,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:54,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359122444] [2022-02-14 21:21:54,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359122444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:54,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800403321] [2022-02-14 21:21:54,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 21:21:54,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:54,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:54,576 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) [2022-02-14 21:21:54,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:21:54,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-02-14 21:21:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:21:54,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 21:21:54,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-02-14 21:21:54,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2022-02-14 21:21:55,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800403321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:55,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:55,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 10] total 50 [2022-02-14 21:21:55,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94367879] [2022-02-14 21:21:55,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:55,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 21:21:55,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 21:21:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1406, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 21:21:55,387 INFO L87 Difference]: Start difference. First operand 214 states and 252 transitions. Second operand has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:56,177 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2022-02-14 21:21:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-14 21:21:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-02-14 21:21:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:56,178 INFO L225 Difference]: With dead ends: 243 [2022-02-14 21:21:56,178 INFO L226 Difference]: Without dead ends: 240 [2022-02-14 21:21:56,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3128, Invalid=6184, Unknown=0, NotChecked=0, Total=9312 [2022-02-14 21:21:56,180 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 47 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:21:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-14 21:21:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-14 21:21:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2170212765957447) internal successors, (286), 235 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 290 transitions. [2022-02-14 21:21:56,196 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 290 transitions. Word has length 213 [2022-02-14 21:21:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:56,196 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 290 transitions. [2022-02-14 21:21:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 48 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 290 transitions. [2022-02-14 21:21:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-14 21:21:56,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:56,204 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:56,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 21:21:56,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:56,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:21:56,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:21:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1030847343, now seen corresponding path program 7 times [2022-02-14 21:21:56,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:21:56,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771132150] [2022-02-14 21:21:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:21:56,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:21:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:56,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:21:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:21:56,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:21:56,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771132150] [2022-02-14 21:21:56,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771132150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:21:56,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389350995] [2022-02-14 21:21:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 21:21:56,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:21:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:21:56,917 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) [2022-02-14 21:21:56,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 21:21:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:21:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 21:21:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:21:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:21:57,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:21:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:21:58,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389350995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:21:58,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:21:58,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-02-14 21:21:58,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430275542] [2022-02-14 21:21:58,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:21:58,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-14 21:21:58,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:21:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-14 21:21:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-02-14 21:21:58,602 INFO L87 Difference]: Start difference. First operand 240 states and 290 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:21:59,938 INFO L93 Difference]: Finished difference Result 312 states and 362 transitions. [2022-02-14 21:21:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-14 21:21:59,938 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-14 21:21:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:21:59,939 INFO L225 Difference]: With dead ends: 312 [2022-02-14 21:21:59,939 INFO L226 Difference]: Without dead ends: 312 [2022-02-14 21:21:59,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2022-02-14 21:21:59,943 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:21:59,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 21:21:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-14 21:21:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-02-14 21:21:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 307 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2022-02-14 21:21:59,950 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 239 [2022-02-14 21:21:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:21:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2022-02-14 21:21:59,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:21:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2022-02-14 21:21:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-02-14 21:21:59,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:21:59,953 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:21:59,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-14 21:22:00,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 21:22:00,168 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -488290871, now seen corresponding path program 8 times [2022-02-14 21:22:00,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:00,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926760871] [2022-02-14 21:22:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:01,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:22:01,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:01,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926760871] [2022-02-14 21:22:01,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926760871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:01,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824822334] [2022-02-14 21:22:01,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:22:01,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:01,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:01,868 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) [2022-02-14 21:22:01,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 21:22:01,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:22:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:01,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 72 conjunts are in the unsatisfiable core [2022-02-14 21:22:01,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:22:02,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:22:06,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824822334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:06,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:06,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-02-14 21:22:06,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989379864] [2022-02-14 21:22:06,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:06,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-14 21:22:06,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-14 21:22:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-02-14 21:22:06,963 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:12,576 INFO L93 Difference]: Finished difference Result 456 states and 506 transitions. [2022-02-14 21:22:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-14 21:22:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-02-14 21:22:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:12,579 INFO L225 Difference]: With dead ends: 456 [2022-02-14 21:22:12,580 INFO L226 Difference]: Without dead ends: 456 [2022-02-14 21:22:12,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12916 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=31033, Invalid=51623, Unknown=0, NotChecked=0, Total=82656 [2022-02-14 21:22:12,597 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:12,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 42 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 21:22:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-14 21:22:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-02-14 21:22:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 451 states have (on average 1.1130820399113082) internal successors, (502), 451 states have internal predecessors, (502), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 506 transitions. [2022-02-14 21:22:12,621 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 506 transitions. Word has length 311 [2022-02-14 21:22:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:12,621 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 506 transitions. [2022-02-14 21:22:12,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 506 transitions. [2022-02-14 21:22:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-02-14 21:22:12,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:12,626 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:12,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-14 21:22:12,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:12,839 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:12,840 INFO L85 PathProgramCache]: Analyzing trace with hash -158375879, now seen corresponding path program 9 times [2022-02-14 21:22:12,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:12,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484716154] [2022-02-14 21:22:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:17,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2022-02-14 21:22:17,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:17,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484716154] [2022-02-14 21:22:17,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484716154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:17,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683047440] [2022-02-14 21:22:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:22:17,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:17,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:17,204 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) [2022-02-14 21:22:17,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 21:22:17,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-02-14 21:22:17,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:17,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 21:22:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-02-14 21:22:18,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2022-02-14 21:22:20,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683047440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:20,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:20,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 13, 16] total 171 [2022-02-14 21:22:20,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776401880] [2022-02-14 21:22:20,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:20,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-14 21:22:20,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-14 21:22:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13870, Invalid=15200, Unknown=0, NotChecked=0, Total=29070 [2022-02-14 21:22:20,112 INFO L87 Difference]: Start difference. First operand 456 states and 506 transitions. Second operand has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:28,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:22:28,021 INFO L93 Difference]: Finished difference Result 509 states and 583 transitions. [2022-02-14 21:22:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-14 21:22:28,021 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-02-14 21:22:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:22:28,023 INFO L225 Difference]: With dead ends: 509 [2022-02-14 21:22:28,023 INFO L226 Difference]: Without dead ends: 506 [2022-02-14 21:22:28,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14711 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=41606, Invalid=72976, Unknown=0, NotChecked=0, Total=114582 [2022-02-14 21:22:28,028 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 572 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:22:28,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 52 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 21:22:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-14 21:22:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-02-14 21:22:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.1497005988023952) internal successors, (576), 501 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 580 transitions. [2022-02-14 21:22:28,035 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 580 transitions. Word has length 455 [2022-02-14 21:22:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:22:28,035 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 580 transitions. [2022-02-14 21:22:28,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 170 states have (on average 2.3117647058823527) internal successors, (393), 169 states have internal predecessors, (393), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:22:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 580 transitions. [2022-02-14 21:22:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-02-14 21:22:28,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:22:28,041 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:22:28,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 21:22:28,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 21:22:28,258 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:22:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:22:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1120053885, now seen corresponding path program 10 times [2022-02-14 21:22:28,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:22:28,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737174764] [2022-02-14 21:22:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:22:28,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:22:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:32,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:22:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:22:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-14 21:22:32,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:22:32,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737174764] [2022-02-14 21:22:32,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737174764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:22:32,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504058904] [2022-02-14 21:22:32,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 21:22:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:22:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:22:32,447 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:22:32,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 21:22:32,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 21:22:32,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:22:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 145 conjunts are in the unsatisfiable core [2022-02-14 21:22:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:22:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-14 21:22:33,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:22:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-14 21:22:46,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504058904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:22:46,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:22:46,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 292 [2022-02-14 21:22:46,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740643230] [2022-02-14 21:22:46,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:22:46,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 292 states [2022-02-14 21:22:46,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:22:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 292 interpolants. [2022-02-14 21:22:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42197, Invalid=42775, Unknown=0, NotChecked=0, Total=84972 [2022-02-14 21:22:46,481 INFO L87 Difference]: Start difference. First operand 506 states and 580 transitions. Second operand has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:23:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:23:05,106 INFO L93 Difference]: Finished difference Result 796 states and 870 transitions. [2022-02-14 21:23:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-02-14 21:23:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 505 [2022-02-14 21:23:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:23:05,109 INFO L225 Difference]: With dead ends: 796 [2022-02-14 21:23:05,109 INFO L226 Difference]: Without dead ends: 796 [2022-02-14 21:23:05,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52482 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=126006, Invalid=209814, Unknown=0, NotChecked=0, Total=335820 [2022-02-14 21:23:05,122 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 299 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:23:05,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 47 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 21:23:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-02-14 21:23:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-02-14 21:23:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 791 states have (on average 1.0948166877370418) internal successors, (866), 791 states have internal predecessors, (866), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:23:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 870 transitions. [2022-02-14 21:23:05,131 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 870 transitions. Word has length 505 [2022-02-14 21:23:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:23:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 870 transitions. [2022-02-14 21:23:05,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 292 states, 292 states have (on average 2.030821917808219) internal successors, (593), 291 states have internal predecessors, (593), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:23:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 870 transitions. [2022-02-14 21:23:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-02-14 21:23:05,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:23:05,136 INFO L514 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:23:05,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 21:23:05,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 21:23:05,351 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:23:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:23:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash -780439167, now seen corresponding path program 11 times [2022-02-14 21:23:05,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:23:05,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949718282] [2022-02-14 21:23:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:23:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:23:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:23:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:23:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:23:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 29767 proven. 83232 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2022-02-14 21:23:24,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:23:24,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949718282] [2022-02-14 21:23:24,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949718282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:23:24,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654347005] [2022-02-14 21:23:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 21:23:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:23:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:23:24,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:23:24,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 21:23:24,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 298 check-sat command(s) [2022-02-14 21:23:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:23:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 151 conjunts are in the unsatisfiable core [2022-02-14 21:23:24,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:23:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-02-14 21:23:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:24:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 118252 backedges. 65688 proven. 22952 refuted. 0 times theorem prover too weak. 29612 trivial. 0 not checked. [2022-02-14 21:24:15,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654347005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:24:15,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:24:15,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [292, 151, 151] total 590 [2022-02-14 21:24:15,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538485108] [2022-02-14 21:24:15,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:24:15,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 590 states [2022-02-14 21:24:15,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:24:15,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 590 interpolants. [2022-02-14 21:24:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173168, Invalid=174342, Unknown=0, NotChecked=0, Total=347510 [2022-02-14 21:24:15,795 INFO L87 Difference]: Start difference. First operand 796 states and 870 transitions. Second operand has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:29:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:29:28,507 INFO L93 Difference]: Finished difference Result 1870 states and 2212 transitions. [2022-02-14 21:29:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 590 states. [2022-02-14 21:29:28,517 INFO L78 Accepts]: Start accepts. Automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-02-14 21:29:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:29:28,529 INFO L225 Difference]: With dead ends: 1870 [2022-02-14 21:29:28,529 INFO L226 Difference]: Without dead ends: 1870 [2022-02-14 21:29:28,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 1175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183157 ImplicationChecksByTransitivity, 166.8s TimeCoverageRelationStatistics Valid=519498, Invalid=864654, Unknown=0, NotChecked=0, Total=1384152 [2022-02-14 21:29:28,621 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 5011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3562 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 6855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5011 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-14 21:29:28,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3562 Valid, 60 Invalid, 6855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5011 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-14 21:29:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-02-14 21:29:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1870. [2022-02-14 21:29:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1865 states have (on average 1.1839142091152814) internal successors, (2208), 1865 states have internal predecessors, (2208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:29:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2212 transitions. [2022-02-14 21:29:28,663 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2212 transitions. Word has length 795 [2022-02-14 21:29:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:29:28,664 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2212 transitions. [2022-02-14 21:29:28,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 590 states, 590 states have (on average 2.227118644067797) internal successors, (1314), 589 states have internal predecessors, (1314), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:29:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2212 transitions. [2022-02-14 21:29:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1870 [2022-02-14 21:29:28,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:29:28,685 INFO L514 BasicCegarLoop]: trace histogram [609, 320, 320, 298, 289, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:29:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 21:29:28,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-14 21:29:28,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:29:28,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:29:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2022732223, now seen corresponding path program 12 times [2022-02-14 21:29:28,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:29:28,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155386799] [2022-02-14 21:29:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:29:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:29:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:29:45,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:29:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:29:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 185310 proven. 83810 refuted. 0 times theorem prover too weak. 203841 trivial. 0 not checked. [2022-02-14 21:29:45,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:29:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155386799] [2022-02-14 21:29:45,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155386799] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:29:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361375820] [2022-02-14 21:29:45,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 21:29:45,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:29:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:29:45,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:29:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 21:29:45,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-02-14 21:29:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:29:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 21:29:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:29:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-02-14 21:29:49,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:29:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 472961 backedges. 39802 proven. 968 refuted. 0 times theorem prover too weak. 432191 trivial. 0 not checked. [2022-02-14 21:29:53,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361375820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:29:53,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:29:53,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [293, 25, 28] total 342 [2022-02-14 21:29:53,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199764915] [2022-02-14 21:29:53,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:29:53,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 342 states [2022-02-14 21:29:53,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:29:53,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 342 interpolants. [2022-02-14 21:29:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56962, Invalid=59660, Unknown=0, NotChecked=0, Total=116622 [2022-02-14 21:29:53,717 INFO L87 Difference]: Start difference. First operand 1870 states and 2212 transitions. Second operand has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:30:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:30:26,262 INFO L93 Difference]: Finished difference Result 1971 states and 2361 transitions. [2022-02-14 21:30:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-02-14 21:30:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1869 [2022-02-14 21:30:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:30:26,273 INFO L225 Difference]: With dead ends: 1971 [2022-02-14 21:30:26,273 INFO L226 Difference]: Without dead ends: 1968 [2022-02-14 21:30:26,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4415 GetRequests, 3736 SyntacticMatches, 0 SemanticMatches, 679 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58832 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=170882, Invalid=292198, Unknown=0, NotChecked=0, Total=463080 [2022-02-14 21:30:26,290 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1157 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 2009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2009 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-14 21:30:26,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 52 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2009 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-14 21:30:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-02-14 21:30:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1968. [2022-02-14 21:30:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.1991849210392256) internal successors, (2354), 1963 states have internal predecessors, (2354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:30:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2358 transitions. [2022-02-14 21:30:26,308 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2358 transitions. Word has length 1869 [2022-02-14 21:30:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:30:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2358 transitions. [2022-02-14 21:30:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 342 states, 341 states have (on average 2.2961876832844577) internal successors, (783), 340 states have internal predecessors, (783), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:30:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2358 transitions. [2022-02-14 21:30:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1968 [2022-02-14 21:30:26,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:30:26,368 INFO L514 BasicCegarLoop]: trace histogram [634, 344, 344, 298, 290, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:30:26,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 21:30:26,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-14 21:30:26,576 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:30:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:30:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -970120395, now seen corresponding path program 13 times [2022-02-14 21:30:26,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:30:26,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460401501] [2022-02-14 21:30:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:30:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:30:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:30:52,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:30:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:30:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-14 21:30:52,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:30:52,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460401501] [2022-02-14 21:30:52,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460401501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:30:52,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497548364] [2022-02-14 21:30:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 21:30:52,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:30:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:30:52,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:30:52,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 21:30:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:30:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 3623 conjuncts, 292 conjunts are in the unsatisfiable core [2022-02-14 21:30:53,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:30:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-14 21:30:55,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:31:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 519948 backedges. 199917 proven. 84390 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-14 21:31:44,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497548364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:31:44,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:31:44,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [294, 293, 293] total 586 [2022-02-14 21:31:44,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631162020] [2022-02-14 21:31:44,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:31:44,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 586 states [2022-02-14 21:31:44,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:31:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 586 interpolants. [2022-02-14 21:31:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170822, Invalid=171988, Unknown=0, NotChecked=0, Total=342810 [2022-02-14 21:31:44,379 INFO L87 Difference]: Start difference. First operand 1968 states and 2358 transitions. Second operand has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:33:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:33:00,051 INFO L93 Difference]: Finished difference Result 2552 states and 2942 transitions. [2022-02-14 21:33:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 585 states. [2022-02-14 21:33:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1967 [2022-02-14 21:33:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:33:00,057 INFO L225 Difference]: With dead ends: 2552 [2022-02-14 21:33:00,057 INFO L226 Difference]: Without dead ends: 2552 [2022-02-14 21:33:00,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4810 GetRequests, 3644 SyntacticMatches, 0 SemanticMatches, 1166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213006 ImplicationChecksByTransitivity, 140.7s TimeCoverageRelationStatistics Valid=511293, Invalid=851763, Unknown=0, NotChecked=0, Total=1363056 [2022-02-14 21:33:00,116 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 21:33:00,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 52 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 21:33:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-02-14 21:33:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2552. [2022-02-14 21:33:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2547 states have (on average 1.1535139379662347) internal successors, (2938), 2547 states have internal predecessors, (2938), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:33:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 2942 transitions. [2022-02-14 21:33:00,137 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 2942 transitions. Word has length 1967 [2022-02-14 21:33:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:33:00,138 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 2942 transitions. [2022-02-14 21:33:00,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 586 states, 586 states have (on average 2.015358361774744) internal successors, (1181), 585 states have internal predecessors, (1181), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:33:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 2942 transitions. [2022-02-14 21:33:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2552 [2022-02-14 21:33:00,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:33:00,175 INFO L514 BasicCegarLoop]: trace histogram [926, 582, 344, 344, 298, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:33:00,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 21:33:00,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:33:00,395 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:33:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:33:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash -194575763, now seen corresponding path program 14 times [2022-02-14 21:33:00,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:33:00,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752615406] [2022-02-14 21:33:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:33:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:33:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:34:04,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:34:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:34:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-14 21:34:04,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:34:04,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752615406] [2022-02-14 21:34:04,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752615406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:34:04,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552906614] [2022-02-14 21:34:04,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:34:04,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:34:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:34:04,955 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 21:34:04,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 21:34:05,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:34:05,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:34:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 4791 conjuncts, 584 conjunts are in the unsatisfiable core [2022-02-14 21:34:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:34:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 975468 backedges. 400521 proven. 339306 refuted. 0 times theorem prover too weak. 235641 trivial. 0 not checked. [2022-02-14 21:34:08,413 INFO L328 TraceCheckSpWp]: Computing backward predicates...