/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/loop-acceleration/array_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:36:00,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:36:00,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:36:00,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:36:00,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:36:00,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:36:00,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:36:00,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:36:00,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:36:00,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:36:00,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:36:00,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:36:00,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:36:00,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:36:00,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:36:00,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:36:00,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:36:00,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:36:00,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:36:00,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:36:00,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:36:00,774 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:36:00,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:36:00,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:36:00,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:36:00,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:36:00,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:36:00,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:36:00,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:36:00,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:36:00,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:36:00,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:36:00,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:36:00,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:36:00,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:36:00,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:36:00,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:36:00,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:36:00,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:36:00,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:36:00,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:36:00,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:36:00,779 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:36:00,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:36:00,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:36:01,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:36:01,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:36:01,026 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:36:01,027 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:36:01,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-02-14 20:36:01,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec268ef3/0dcb64ca85474c0d8a376fa134a64c86/FLAG449fcd5fe [2022-02-14 20:36:01,486 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:36:01,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-02-14 20:36:01,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec268ef3/0dcb64ca85474c0d8a376fa134a64c86/FLAG449fcd5fe [2022-02-14 20:36:01,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec268ef3/0dcb64ca85474c0d8a376fa134a64c86 [2022-02-14 20:36:01,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:36:01,519 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:36:01,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:36:01,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:36:01,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:36:01,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4a135d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01, skipping insertion in model container [2022-02-14 20:36:01,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:36:01,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:36:01,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i[809,822] [2022-02-14 20:36:01,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:36:01,712 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:36:01,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i[809,822] [2022-02-14 20:36:01,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:36:01,743 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:36:01,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01 WrapperNode [2022-02-14 20:36:01,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:36:01,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:36:01,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:36:01,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:36:01,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:36:01,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:36:01,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:36:01,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:36:01,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (1/1) ... [2022-02-14 20:36:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:36:01,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:01,815 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 20:36:01,839 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 20:36:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:36:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:36:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:36:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:36:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:36:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:36:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:36:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:36:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:36:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:36:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:36:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:36:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:36:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-14 20:36:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-02-14 20:36:01,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:36:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:36:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:36:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:36:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:36:01,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:36:01,934 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:36:01,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:36:02,081 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:36:02,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:36:02,086 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 20:36:02,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:36:02 BoogieIcfgContainer [2022-02-14 20:36:02,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:36:02,088 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:36:02,088 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:36:02,110 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:36:02,113 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:36:02" (1/1) ... [2022-02-14 20:36:02,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:36:02 BasicIcfg [2022-02-14 20:36:02,125 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:36:02,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:36:02,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:36:02,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:36:02,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:36:01" (1/4) ... [2022-02-14 20:36:02,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3782a424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:36:02, skipping insertion in model container [2022-02-14 20:36:02,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:36:01" (2/4) ... [2022-02-14 20:36:02,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3782a424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:36:02, skipping insertion in model container [2022-02-14 20:36:02,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:36:02" (3/4) ... [2022-02-14 20:36:02,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3782a424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:36:02, skipping insertion in model container [2022-02-14 20:36:02,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:36:02" (4/4) ... [2022-02-14 20:36:02,135 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.iJordan [2022-02-14 20:36:02,139 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:36:02,139 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:36:02,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:36:02,196 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 20:36:02,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:36:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 20:36:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 20:36:02,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:02,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:02,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1502470948, now seen corresponding path program 1 times [2022-02-14 20:36:02,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:02,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185922930] [2022-02-14 20:36:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:02,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,440 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 20:36:02,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:02,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185922930] [2022-02-14 20:36:02,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185922930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:36:02,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:36:02,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 20:36:02,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167602427] [2022-02-14 20:36:02,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:36:02,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 20:36:02,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 20:36:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:36:02,471 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 20:36:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:02,502 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-02-14 20:36:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 20:36:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-14 20:36:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:02,509 INFO L225 Difference]: With dead ends: 21 [2022-02-14 20:36:02,509 INFO L226 Difference]: Without dead ends: 14 [2022-02-14 20:36:02,510 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 20:36:02,513 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 20:36:02,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:36:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-14 20:36:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-14 20:36:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 20:36:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-14 20:36:02,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-14 20:36:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:02,545 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-14 20:36:02,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 20:36:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-14 20:36:02,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 20:36:02,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:02,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:02,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:36:02,547 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1473841797, now seen corresponding path program 1 times [2022-02-14 20:36:02,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:02,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906145763] [2022-02-14 20:36:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:02,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,613 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 20:36:02,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:02,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906145763] [2022-02-14 20:36:02,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906145763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:36:02,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:36:02,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:36:02,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621989088] [2022-02-14 20:36:02,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:36:02,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:36:02,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:36:02,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:36:02,616 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 20:36:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:02,641 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-02-14 20:36:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:36:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-02-14 20:36:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:02,644 INFO L225 Difference]: With dead ends: 16 [2022-02-14 20:36:02,644 INFO L226 Difference]: Without dead ends: 16 [2022-02-14 20:36:02,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:36:02,646 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:36:02,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:36:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-14 20:36:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-02-14 20:36:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 20:36:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-14 20:36:02,653 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-02-14 20:36:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:02,653 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-14 20:36:02,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 20:36:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-14 20:36:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 20:36:02,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:02,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:02,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:36:02,655 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -805744227, now seen corresponding path program 1 times [2022-02-14 20:36:02,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:02,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60071255] [2022-02-14 20:36:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:02,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,744 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 20:36:02,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:02,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60071255] [2022-02-14 20:36:02,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60071255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:36:02,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384148983] [2022-02-14 20:36:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:02,750 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 20:36:02,754 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 20:36:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-14 20:36:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:36:02,867 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 20:36:02,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:36:02,913 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 20:36:02,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384148983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:36:02,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:36:02,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-14 20:36:02,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177725532] [2022-02-14 20:36:02,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:36:02,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:36:02,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:36:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:36:02,915 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 20:36:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:02,973 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-02-14 20:36:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:36:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 14 [2022-02-14 20:36:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:02,974 INFO L225 Difference]: With dead ends: 21 [2022-02-14 20:36:02,974 INFO L226 Difference]: Without dead ends: 21 [2022-02-14 20:36:02,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:36:02,975 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:36:02,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:36:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-14 20:36:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-14 20:36:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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 20:36:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-14 20:36:02,979 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-02-14 20:36:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:02,979 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-14 20:36:02,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 20:36:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-14 20:36:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 20:36:02,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:02,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:03,004 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 20:36:03,197 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 20:36:03,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1812339965, now seen corresponding path program 2 times [2022-02-14 20:36:03,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:03,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335705151] [2022-02-14 20:36:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:03,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:03,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:03,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335705151] [2022-02-14 20:36:03,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335705151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:36:03,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976213428] [2022-02-14 20:36:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:36:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:03,336 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 20:36:03,339 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 20:36:03,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:36:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:36:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 20:36:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:36:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:03,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:36:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:03,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976213428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:36:03,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:36:03,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-14 20:36:03,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227429753] [2022-02-14 20:36:03,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:36:03,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 20:36:03,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:03,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 20:36:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:36:03,557 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 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 20:36:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:03,703 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-02-14 20:36:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 20:36:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-14 20:36:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:03,704 INFO L225 Difference]: With dead ends: 33 [2022-02-14 20:36:03,704 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 20:36:03,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-02-14 20:36:03,706 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:36:03,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:36:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 20:36:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 20:36:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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 20:36:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-14 20:36:03,711 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2022-02-14 20:36:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:03,711 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-14 20:36:03,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 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 20:36:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-14 20:36:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 20:36:03,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:03,712 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:03,737 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 20:36:03,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 20:36:03,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash -701958065, now seen corresponding path program 3 times [2022-02-14 20:36:03,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:03,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113375216] [2022-02-14 20:36:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:03,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:04,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:04,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113375216] [2022-02-14 20:36:04,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113375216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:36:04,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760310817] [2022-02-14 20:36:04,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:36:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:04,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:04,124 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 20:36:04,147 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 20:36:04,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-14 20:36:04,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:36:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 20:36:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:36:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:04,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:36:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:04,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760310817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:36:04,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:36:04,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-02-14 20:36:04,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672588550] [2022-02-14 20:36:04,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:36:04,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 20:36:04,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 20:36:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-02-14 20:36:04,546 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 20:36:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:04,938 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-02-14 20:36:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 20:36:04,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 32 [2022-02-14 20:36:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:04,939 INFO L225 Difference]: With dead ends: 57 [2022-02-14 20:36:04,939 INFO L226 Difference]: Without dead ends: 57 [2022-02-14 20:36:04,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-02-14 20:36:04,941 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:36:04,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 34 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:36:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-14 20:36:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-14 20:36:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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 20:36:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-14 20:36:04,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2022-02-14 20:36:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:04,947 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-14 20:36:04,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 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 20:36:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-14 20:36:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-14 20:36:04,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:04,949 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:04,973 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 20:36:05,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:05,150 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1914531047, now seen corresponding path program 4 times [2022-02-14 20:36:05,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:05,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411656000] [2022-02-14 20:36:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:05,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:05,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:05,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:05,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411656000] [2022-02-14 20:36:05,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411656000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:36:05,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883425859] [2022-02-14 20:36:05,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 20:36:05,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:05,528 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 20:36:05,543 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 20:36:05,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 20:36:05,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:36:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 20:36:05,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:36:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:05,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:36:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:06,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883425859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:36:06,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:36:06,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-02-14 20:36:06,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333105240] [2022-02-14 20:36:06,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:36:06,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-14 20:36:06,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-14 20:36:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-02-14 20:36:06,487 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 20:36:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:07,580 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-02-14 20:36:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-14 20:36:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 56 [2022-02-14 20:36:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:07,581 INFO L225 Difference]: With dead ends: 105 [2022-02-14 20:36:07,581 INFO L226 Difference]: Without dead ends: 105 [2022-02-14 20:36:07,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-02-14 20:36:07,585 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:36:07,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 39 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:36:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-14 20:36:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-14 20:36:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 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 20:36:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-02-14 20:36:07,594 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2022-02-14 20:36:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:07,594 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-02-14 20:36:07,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 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 20:36:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-02-14 20:36:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-14 20:36:07,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:07,599 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:07,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 20:36:07,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:07,816 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1226014231, now seen corresponding path program 5 times [2022-02-14 20:36:07,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:07,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953422429] [2022-02-14 20:36:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:08,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:08,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953422429] [2022-02-14 20:36:08,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953422429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:36:08,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725845778] [2022-02-14 20:36:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 20:36:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:08,862 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 20:36:08,863 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 20:36:42,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-02-14 20:36:42,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:36:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-14 20:36:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:36:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:42,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:36:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:45,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725845778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:36:45,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:36:45,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-02-14 20:36:45,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680795307] [2022-02-14 20:36:45,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:36:45,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-14 20:36:45,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:36:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-14 20:36:45,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-02-14 20:36:45,209 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 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 20:36:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:36:48,383 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2022-02-14 20:36:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-14 20:36:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 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 104 [2022-02-14 20:36:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:36:48,385 INFO L225 Difference]: With dead ends: 201 [2022-02-14 20:36:48,385 INFO L226 Difference]: Without dead ends: 201 [2022-02-14 20:36:48,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-02-14 20:36:48,392 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 242 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:36:48,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 39 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 20:36:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-14 20:36:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-02-14 20:36:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 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 20:36:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2022-02-14 20:36:48,403 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2022-02-14 20:36:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:36:48,403 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2022-02-14 20:36:48,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 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 20:36:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2022-02-14 20:36:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-14 20:36:48,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:36:48,406 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:36:48,436 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 20:36:48,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:48,612 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:36:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:36:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 349454455, now seen corresponding path program 6 times [2022-02-14 20:36:48,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:36:48,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604155233] [2022-02-14 20:36:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:36:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:36:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:36:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:36:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:36:51,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:36:51,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604155233] [2022-02-14 20:36:51,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604155233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:36:51,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909489820] [2022-02-14 20:36:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 20:36:51,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:36:51,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:36:51,734 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 20:36:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process