/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-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:53:45,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:53:45,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:53:45,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:53:45,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:53:45,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:53:45,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:53:45,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:53:45,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:53:45,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:53:45,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:53:45,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:53:45,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:53:45,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:53:45,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:53:45,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:53:45,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:53:45,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:53:45,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:53:45,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:53:45,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:53:45,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:53:45,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:53:45,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:53:45,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:53:45,757 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:53:45,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:53:45,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:53:45,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:53:45,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:53:45,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:53:45,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:53:45,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:53:45,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:53:45,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:53:45,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:53:45,759 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:53:45,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:53:45,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:53:45,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:53:45,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:53:45,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:53:45,972 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:53:45,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-02-14 20:53:46,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36864192b/9e68ea3ae0bd4a2dbb4e90bb6455b951/FLAG33743bc92 [2022-02-14 20:53:46,414 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:53:46,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-02-14 20:53:46,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36864192b/9e68ea3ae0bd4a2dbb4e90bb6455b951/FLAG33743bc92 [2022-02-14 20:53:46,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36864192b/9e68ea3ae0bd4a2dbb4e90bb6455b951 [2022-02-14 20:53:46,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:53:46,847 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:53:46,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:53:46,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:53:46,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:53:46,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:53:46" (1/1) ... [2022-02-14 20:53:46,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d351a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:46, skipping insertion in model container [2022-02-14 20:53:46,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:53:46" (1/1) ... [2022-02-14 20:53:46,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:53:46,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:53:47,069 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-new/count_by_nondet.i[891,904] [2022-02-14 20:53:47,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:53:47,093 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:53:47,103 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-new/count_by_nondet.i[891,904] [2022-02-14 20:53:47,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:53:47,119 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:53:47,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47 WrapperNode [2022-02-14 20:53:47,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:53:47,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:53:47,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:53:47,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:53:47,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:53:47,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:53:47,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:53:47,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:53:47,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:53:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:47,187 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 20:53:47,201 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 20:53:47,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:53:47,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:53:47,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:53:47,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 20:53:47,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:53:47,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:53:47,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:53:47,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:53:47,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:53:47,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:53:47,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:53:47,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:53:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 20:53:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:53:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 20:53:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:53:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:53:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:53:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:53:47,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:53:47,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:53:47,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:53:47,295 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:53:47,296 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:53:47,411 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:53:47,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:53:47,415 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 20:53:47,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:53:47 BoogieIcfgContainer [2022-02-14 20:53:47,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:53:47,417 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:53:47,417 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:53:47,424 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:53:47,427 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:53:47" (1/1) ... [2022-02-14 20:53:47,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:53:47 BasicIcfg [2022-02-14 20:53:47,441 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:53:47,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:53:47,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:53:47,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:53:47,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:53:46" (1/4) ... [2022-02-14 20:53:47,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba04de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:53:47, skipping insertion in model container [2022-02-14 20:53:47,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:53:47" (2/4) ... [2022-02-14 20:53:47,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba04de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:53:47, skipping insertion in model container [2022-02-14 20:53:47,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:53:47" (3/4) ... [2022-02-14 20:53:47,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba04de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:53:47, skipping insertion in model container [2022-02-14 20:53:47,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:53:47" (4/4) ... [2022-02-14 20:53:47,448 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.iJordan [2022-02-14 20:53:47,451 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:53:47,451 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:53:47,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:53:47,489 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 20:53:47,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:53:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 20:53:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 20:53:47,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:47,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:47,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 180216049, now seen corresponding path program 1 times [2022-02-14 20:53:47,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:47,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582138369] [2022-02-14 20:53:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:47,739 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 20:53:47,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:47,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582138369] [2022-02-14 20:53:47,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582138369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:53:47,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:53:47,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:53:47,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157955717] [2022-02-14 20:53:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:53:47,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:53:47,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:53:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:53:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:53:47,781 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 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 20:53:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:53:47,853 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-14 20:53:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:53:47,856 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 20:53:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:53:47,860 INFO L225 Difference]: With dead ends: 24 [2022-02-14 20:53:47,860 INFO L226 Difference]: Without dead ends: 15 [2022-02-14 20:53:47,862 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 20:53:47,864 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:53:47,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:53:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-14 20:53:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-02-14 20:53:47,889 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 20:53:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-14 20:53:47,890 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-02-14 20:53:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:53:47,891 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-14 20:53:47,891 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 20:53:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-14 20:53:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 20:53:47,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:47,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:47,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:53:47,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:47,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1966995474, now seen corresponding path program 1 times [2022-02-14 20:53:47,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:47,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724613629] [2022-02-14 20:53:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:47,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:47,985 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 20:53:47,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:47,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724613629] [2022-02-14 20:53:47,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724613629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:53:47,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838266386] [2022-02-14 20:53:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:47,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:47,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:47,989 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 20:53:47,990 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 20:53:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 20:53:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:53:48,130 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 20:53:48,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:53:48,172 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 20:53:48,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838266386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:53:48,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:53:48,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-02-14 20:53:48,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741428615] [2022-02-14 20:53:48,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:53:48,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:53:48,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:53:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:53:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:53:48,175 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 20:53:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:53:48,240 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-02-14 20:53:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 20:53:48,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 20:53:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:53:48,244 INFO L225 Difference]: With dead ends: 16 [2022-02-14 20:53:48,244 INFO L226 Difference]: Without dead ends: 16 [2022-02-14 20:53:48,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:53:48,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:53:48,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:53:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-14 20:53:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-14 20:53:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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 20:53:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-02-14 20:53:48,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-02-14 20:53:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:53:48,251 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-02-14 20:53:48,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 20:53:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-02-14 20:53:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-14 20:53:48,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:48,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:48,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 20:53:48,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:48,460 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 442000299, now seen corresponding path program 2 times [2022-02-14 20:53:48,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:48,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335044299] [2022-02-14 20:53:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:48,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:48,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:48,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335044299] [2022-02-14 20:53:48,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335044299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:53:48,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369266619] [2022-02-14 20:53:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:53:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:48,539 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 20:53:48,543 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 20:53:48,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:53:48,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:53:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 20:53:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:53:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:53:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:48,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369266619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:53:48,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:53:48,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-14 20:53:48,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631779421] [2022-02-14 20:53:48,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:53:48,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 20:53:48,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:53:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 20:53:48,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:53:48,751 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:53:48,921 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-02-14 20:53:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 20:53:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-14 20:53:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:53:48,923 INFO L225 Difference]: With dead ends: 31 [2022-02-14 20:53:48,923 INFO L226 Difference]: Without dead ends: 25 [2022-02-14 20:53:48,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:53:48,927 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:53:48,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:53:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-14 20:53:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-02-14 20:53:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 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 20:53:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-02-14 20:53:48,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2022-02-14 20:53:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:53:48,936 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-02-14 20:53:48,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-02-14 20:53:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 20:53:48,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:48,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:48,962 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 20:53:49,162 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,SelfDestructingSolverStorable2 [2022-02-14 20:53:49,163 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:49,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1322263071, now seen corresponding path program 3 times [2022-02-14 20:53:49,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:49,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765484589] [2022-02-14 20:53:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:49,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:49,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:49,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765484589] [2022-02-14 20:53:49,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765484589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:53:49,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407491761] [2022-02-14 20:53:49,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:53:49,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:49,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:49,333 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 20:53:49,334 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 20:53:49,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-14 20:53:49,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:53:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 20:53:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:53:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:49,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:53:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:49,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407491761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:53:49,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:53:49,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-02-14 20:53:49,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109768311] [2022-02-14 20:53:49,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:53:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 20:53:49,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:53:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 20:53:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:53:49,626 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:53:49,911 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-02-14 20:53:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 20:53:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 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 20:53:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:53:49,913 INFO L225 Difference]: With dead ends: 51 [2022-02-14 20:53:49,913 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 20:53:49,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 20:53:49,914 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:53:49,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:53:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 20:53:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-02-14 20:53:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 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 20:53:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-02-14 20:53:49,919 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 23 [2022-02-14 20:53:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:53:49,919 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-02-14 20:53:49,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-02-14 20:53:49,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 20:53:49,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:49,920 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:49,942 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 20:53:50,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:50,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash 467698439, now seen corresponding path program 4 times [2022-02-14 20:53:50,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:50,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058087491] [2022-02-14 20:53:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:50,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:50,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058087491] [2022-02-14 20:53:50,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058087491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:53:50,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917591267] [2022-02-14 20:53:50,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 20:53:50,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:50,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:50,418 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 20:53:50,423 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 20:53:50,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 20:53:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:53:50,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 20:53:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:53:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:50,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:53:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:51,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917591267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:53:51,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:53:51,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-02-14 20:53:51,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213840957] [2022-02-14 20:53:51,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:53:51,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-14 20:53:51,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:53:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-14 20:53:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 20:53:51,041 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:53:51,744 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2022-02-14 20:53:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-14 20:53:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-14 20:53:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:53:51,745 INFO L225 Difference]: With dead ends: 91 [2022-02-14 20:53:51,745 INFO L226 Difference]: Without dead ends: 73 [2022-02-14 20:53:51,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1544, Invalid=3286, Unknown=0, NotChecked=0, Total=4830 [2022-02-14 20:53:51,748 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:53:51,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 48 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:53:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-14 20:53:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-02-14 20:53:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 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 20:53:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-02-14 20:53:51,755 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 39 [2022-02-14 20:53:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:53:51,755 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-02-14 20:53:51,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-02-14 20:53:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-14 20:53:51,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:51,757 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:51,785 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 20:53:51,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:51,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 355783895, now seen corresponding path program 5 times [2022-02-14 20:53:51,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:51,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531444523] [2022-02-14 20:53:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:52,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:52,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531444523] [2022-02-14 20:53:52,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531444523] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:53:52,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019714247] [2022-02-14 20:53:52,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 20:53:52,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:52,585 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 20:53:52,586 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 20:53:52,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-02-14 20:53:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:53:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 20:53:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:53:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:52,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:53:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:54,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019714247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:53:54,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:53:54,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-02-14 20:53:54,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25974747] [2022-02-14 20:53:54,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:53:54,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-14 20:53:54,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:53:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-14 20:53:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-02-14 20:53:54,105 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:53:55,954 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2022-02-14 20:53:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-14 20:53:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-14 20:53:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:53:55,958 INFO L225 Difference]: With dead ends: 171 [2022-02-14 20:53:55,958 INFO L226 Difference]: Without dead ends: 137 [2022-02-14 20:53:55,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6136, Invalid=11686, Unknown=0, NotChecked=0, Total=17822 [2022-02-14 20:53:55,963 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 301 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:53:55,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 43 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 20:53:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-14 20:53:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-02-14 20:53:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 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 20:53:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-02-14 20:53:55,977 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 71 [2022-02-14 20:53:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:53:55,978 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-02-14 20:53:55,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:53:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-02-14 20:53:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-14 20:53:55,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:53:55,979 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:53:55,997 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 20:53:56,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:56,188 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:53:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:53:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1512814711, now seen corresponding path program 6 times [2022-02-14 20:53:56,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:53:56,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501226528] [2022-02-14 20:53:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:53:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:53:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:53:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:53:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:57,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:53:57,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501226528] [2022-02-14 20:53:57,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501226528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:53:57,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674589686] [2022-02-14 20:53:57,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 20:53:57,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:53:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:53:57,812 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 20:53:57,821 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 20:53:58,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-02-14 20:53:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:53:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-14 20:53:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:53:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:53:58,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:54:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:54:02,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674589686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:54:02,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:54:02,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-02-14 20:54:02,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329688126] [2022-02-14 20:54:02,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:54:02,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-14 20:54:02,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:54:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-14 20:54:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-02-14 20:54:02,353 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:54:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:54:08,075 INFO L93 Difference]: Finished difference Result 331 states and 394 transitions. [2022-02-14 20:54:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-14 20:54:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-02-14 20:54:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:54:08,077 INFO L225 Difference]: With dead ends: 331 [2022-02-14 20:54:08,077 INFO L226 Difference]: Without dead ends: 265 [2022-02-14 20:54:08,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11275 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=24536, Invalid=43846, Unknown=0, NotChecked=0, Total=68382 [2022-02-14 20:54:08,085 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 525 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 20:54:08,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 53 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 20:54:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-14 20:54:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-02-14 20:54:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0038610038610039) internal successors, (260), 259 states have internal predecessors, (260), 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 20:54:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 264 transitions. [2022-02-14 20:54:08,098 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 264 transitions. Word has length 135 [2022-02-14 20:54:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:54:08,099 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 264 transitions. [2022-02-14 20:54:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:54:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 264 transitions. [2022-02-14 20:54:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-02-14 20:54:08,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:54:08,104 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:54:08,120 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 20:54:08,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:54:08,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:54:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:54:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -648904777, now seen corresponding path program 7 times [2022-02-14 20:54:08,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:54:08,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78316224] [2022-02-14 20:54:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:54:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:54:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:54:13,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:54:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:54:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:54:13,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:54:13,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78316224] [2022-02-14 20:54:13,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78316224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:54:13,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578607139] [2022-02-14 20:54:13,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 20:54:13,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:54:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:54:13,828 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 20:54:13,829 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 20:54:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:54:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 130 conjunts are in the unsatisfiable core [2022-02-14 20:54:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:54:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:54:14,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:54:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:54:29,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578607139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:54:29,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:54:29,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-02-14 20:54:29,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918080740] [2022-02-14 20:54:29,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:54:29,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 262 states [2022-02-14 20:54:29,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:54:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2022-02-14 20:54:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32908, Invalid=35474, Unknown=0, NotChecked=0, Total=68382 [2022-02-14 20:54:29,545 INFO L87 Difference]: Start difference. First operand 264 states and 264 transitions. Second operand has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:54:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:54:51,291 INFO L93 Difference]: Finished difference Result 651 states and 778 transitions. [2022-02-14 20:54:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-02-14 20:54:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-02-14 20:54:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:54:51,293 INFO L225 Difference]: With dead ends: 651 [2022-02-14 20:54:51,293 INFO L226 Difference]: Without dead ends: 521 [2022-02-14 20:54:51,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43051 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=98200, Invalid=169606, Unknown=0, NotChecked=0, Total=267806 [2022-02-14 20:54:51,304 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 20:54:51,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1287 Valid, 48 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 20:54:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-14 20:54:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2022-02-14 20:54:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.0019417475728156) internal successors, (516), 515 states have internal predecessors, (516), 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 20:54:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 520 transitions. [2022-02-14 20:54:51,328 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 520 transitions. Word has length 263 [2022-02-14 20:54:51,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:54:51,329 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 520 transitions. [2022-02-14 20:54:51,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:54:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 520 transitions. [2022-02-14 20:54:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-02-14 20:54:51,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:54:51,338 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:54:51,364 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 20:54:51,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:54:51,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:54:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:54:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 209980983, now seen corresponding path program 8 times [2022-02-14 20:54:51,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:54:51,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102457978] [2022-02-14 20:54:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:54:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:54:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:55:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:55:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:55:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:55:12,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:55:12,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102457978] [2022-02-14 20:55:12,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102457978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:55:12,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659389320] [2022-02-14 20:55:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:55:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:55:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:55:12,220 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 20:55:12,223 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 20:55:12,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:55:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:55:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 258 conjunts are in the unsatisfiable core [2022-02-14 20:55:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:55:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:55:13,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:56:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:56:11,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659389320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:56:11,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:56:11,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 259, 259] total 518 [2022-02-14 20:56:11,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961160973] [2022-02-14 20:56:11,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:56:11,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 518 states [2022-02-14 20:56:11,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:56:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 518 interpolants. [2022-02-14 20:56:11,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131340, Invalid=136466, Unknown=0, NotChecked=0, Total=267806 [2022-02-14 20:56:11,724 INFO L87 Difference]: Start difference. First operand 520 states and 520 transitions. Second operand has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:57:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:57:46,078 INFO L93 Difference]: Finished difference Result 1291 states and 1546 transitions. [2022-02-14 20:57:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 515 states. [2022-02-14 20:57:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-02-14 20:57:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:57:46,085 INFO L225 Difference]: With dead ends: 1291 [2022-02-14 20:57:46,085 INFO L226 Difference]: Without dead ends: 1033 [2022-02-14 20:57:46,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168043 ImplicationChecksByTransitivity, 154.7s TimeCoverageRelationStatistics Valid=392984, Invalid=666886, Unknown=0, NotChecked=0, Total=1059870 [2022-02-14 20:57:46,140 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2767 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 1283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-14 20:57:46,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2767 Valid, 78 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1283 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-14 20:57:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-02-14 20:57:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1032. [2022-02-14 20:57:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.0009737098344693) internal successors, (1028), 1027 states have internal predecessors, (1028), 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 20:57:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1032 transitions. [2022-02-14 20:57:46,166 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1032 transitions. Word has length 519 [2022-02-14 20:57:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:57:46,167 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1032 transitions. [2022-02-14 20:57:46,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:57:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1032 transitions. [2022-02-14 20:57:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2022-02-14 20:57:46,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:57:46,195 INFO L514 BasicCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:57:46,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 20:57:46,411 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,SelfDestructingSolverStorable8 [2022-02-14 20:57:46,411 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:57:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:57:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1182214967, now seen corresponding path program 9 times [2022-02-14 20:57:46,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:57:46,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678219688] [2022-02-14 20:57:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:57:46,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:57:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:59:09,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:59:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:59:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:59:09,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:59:09,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678219688] [2022-02-14 20:59:09,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678219688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:59:09,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806803480] [2022-02-14 20:59:09,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:59:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:59:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:59:09,244 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 20:59:09,244 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 20:59:13,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2022-02-14 20:59:13,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:59:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 514 conjunts are in the unsatisfiable core [2022-02-14 20:59:13,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:59:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:59:16,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:03:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:03:14,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806803480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:03:14,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:03:14,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [516, 515, 515] total 1030 [2022-02-14 21:03:14,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880633392] [2022-02-14 21:03:14,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:03:14,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1030 states [2022-02-14 21:03:14,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:03:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1030 interpolants. [2022-02-14 21:03:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524812, Invalid=535058, Unknown=0, NotChecked=0, Total=1059870 [2022-02-14 21:03:14,253 INFO L87 Difference]: Start difference. First operand 1032 states and 1032 transitions. Second operand has 1030 states, 1030 states have (on average 1.9951456310679612) internal successors, (2055), 1027 states have internal predecessors, (2055), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)