/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/nla-digbench-scaling/hard-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 23:09:46,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 23:09:46,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 23:09:46,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 23:09:46,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 23:09:46,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 23:09:46,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 23:09:46,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 23:09:46,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 23:09:46,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 23:09:46,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 23:09:46,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 23:09:46,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 23:09:46,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 23:09:46,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 23:09:46,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 23:09:46,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 23:09:46,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 23:09:46,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 23:09:46,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 23:09:46,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 23:09:46,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 23:09:46,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 23:09:46,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 23:09:46,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 23:09:46,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 23:09:46,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 23:09:46,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 23:09:46,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 23:09:46,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 23:09:46,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 23:09:46,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 23:09:46,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 23:09:46,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 23:09:46,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 23:09:46,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 23:09:46,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 23:09:46,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 23:09:46,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 23:09:46,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 23:09:46,789 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 23:09:46,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 23:09:46,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 23:09:46,791 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 23:09:46,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 23:09:46,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 23:09:46,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 23:09:46,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 23:09:46,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 23:09:46,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:09:46,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 23:09:46,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 23:09:46,792 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 23:09:46,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 23:09:46,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 23:09:47,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 23:09:47,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 23:09:47,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 23:09:47,011 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 23:09:47,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2022-02-14 23:09:47,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d80decde/0d67c8b2e8a644cea579d14c0e2dfb38/FLAGc9cc4ffa9 [2022-02-14 23:09:47,397 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 23:09:47,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2022-02-14 23:09:47,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d80decde/0d67c8b2e8a644cea579d14c0e2dfb38/FLAGc9cc4ffa9 [2022-02-14 23:09:47,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d80decde/0d67c8b2e8a644cea579d14c0e2dfb38 [2022-02-14 23:09:47,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 23:09:47,418 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 23:09:47,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 23:09:47,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 23:09:47,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 23:09:47,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86c51e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47, skipping insertion in model container [2022-02-14 23:09:47,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 23:09:47,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 23:09:47,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2022-02-14 23:09:47,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:09:47,610 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 23:09:47,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2022-02-14 23:09:47,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:09:47,650 INFO L208 MainTranslator]: Completed translation [2022-02-14 23:09:47,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47 WrapperNode [2022-02-14 23:09:47,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 23:09:47,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 23:09:47,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 23:09:47,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 23:09:47,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 23:09:47,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 23:09:47,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 23:09:47,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 23:09:47,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:47,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:09:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:47,724 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 23:09:47,739 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 23:09:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 23:09:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 23:09:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 23:09:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 23:09:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 23:09:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 23:09:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 23:09:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 23:09:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 23:09:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 23:09:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 23:09:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 23:09:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 23:09:47,818 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 23:09:47,819 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 23:09:47,947 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 23:09:47,953 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 23:09:47,953 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 23:09:47,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:09:47 BoogieIcfgContainer [2022-02-14 23:09:47,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 23:09:47,974 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 23:09:47,974 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 23:09:47,975 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 23:09:47,992 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:09:47" (1/1) ... [2022-02-14 23:09:48,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:09:48 BasicIcfg [2022-02-14 23:09:48,010 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 23:09:48,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 23:09:48,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 23:09:48,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 23:09:48,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:09:47" (1/4) ... [2022-02-14 23:09:48,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2529c944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:09:48, skipping insertion in model container [2022-02-14 23:09:48,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:09:47" (2/4) ... [2022-02-14 23:09:48,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2529c944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:09:48, skipping insertion in model container [2022-02-14 23:09:48,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:09:47" (3/4) ... [2022-02-14 23:09:48,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2529c944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:09:48, skipping insertion in model container [2022-02-14 23:09:48,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:09:48" (4/4) ... [2022-02-14 23:09:48,022 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.cJordan [2022-02-14 23:09:48,026 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 23:09:48,026 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 23:09:48,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 23:09:48,070 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 23:09:48,070 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 23:09:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 23:09:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:09:48,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:48,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:48,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-02-14 23:09:48,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:48,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292868586] [2022-02-14 23:09:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:09:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:09:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:09:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:09:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:09:48,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:48,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292868586] [2022-02-14 23:09:48,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292868586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:09:48,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:09:48,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 23:09:48,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042040177] [2022-02-14 23:09:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:48,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 23:09:48,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 23:09:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:09:48,278 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:09:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:48,347 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-14 23:09:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 23:09:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 23:09:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:48,355 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:09:48,356 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 23:09:48,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:09:48,360 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:48,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:09:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 23:09:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 23:09:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:09:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-14 23:09:48,391 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-02-14 23:09:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:48,392 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-14 23:09:48,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:09:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-14 23:09:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:09:48,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:48,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:48,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 23:09:48,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-02-14 23:09:48,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:48,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900324811] [2022-02-14 23:09:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:48,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:09:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:09:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:09:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:09:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:09:48,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:48,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900324811] [2022-02-14 23:09:48,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900324811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:09:48,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:09:48,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:09:48,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306333918] [2022-02-14 23:09:48,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:09:48,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:09:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:09:48,543 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 23:09:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:48,734 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-02-14 23:09:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:09:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-14 23:09:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:48,737 INFO L225 Difference]: With dead ends: 44 [2022-02-14 23:09:48,738 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 23:09:48,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:09:48,746 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:48,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:09:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 23:09:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-14 23:09:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:09:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-14 23:09:48,755 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-02-14 23:09:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:48,755 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-14 23:09:48,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 23:09:48,755 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-14 23:09:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 23:09:48,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:48,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:48,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 23:09:48,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-02-14 23:09:48,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:48,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448576053] [2022-02-14 23:09:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:48,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:09:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:09:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:09:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:09:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 23:09:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:09:48,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:48,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448576053] [2022-02-14 23:09:48,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448576053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:09:48,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:09:48,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:09:48,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296140979] [2022-02-14 23:09:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:48,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:09:48,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:09:48,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:09:48,925 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:09:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:49,105 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-02-14 23:09:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:09:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-14 23:09:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:49,110 INFO L225 Difference]: With dead ends: 48 [2022-02-14 23:09:49,110 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 23:09:49,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:09:49,118 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:49,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:09:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 23:09:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-14 23:09:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:09:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-02-14 23:09:49,130 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-02-14 23:09:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:49,130 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-02-14 23:09:49,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:09:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-02-14 23:09:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 23:09:49,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:49,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:49,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 23:09:49,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-02-14 23:09:49,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:49,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079095484] [2022-02-14 23:09:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:49,160 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:49,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575500364] [2022-02-14 23:09:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:49,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:49,168 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 23:09:49,199 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 23:09:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:49,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 23:09:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:09:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-14 23:09:49,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:09:49,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:49,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079095484] [2022-02-14 23:09:49,497 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:09:49,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575500364] [2022-02-14 23:09:49,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575500364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:09:49,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:09:49,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 23:09:49,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349098294] [2022-02-14 23:09:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 23:09:49,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 23:09:49,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:09:49,499 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-14 23:09:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:49,599 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-02-14 23:09:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:09:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-02-14 23:09:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:49,603 INFO L225 Difference]: With dead ends: 56 [2022-02-14 23:09:49,603 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 23:09:49,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:09:49,609 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:49,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:09:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 23:09:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-14 23:09:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 23:09:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-14 23:09:49,627 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-02-14 23:09:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:49,627 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-14 23:09:49,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-14 23:09:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-14 23:09:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 23:09:49,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:49,630 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:49,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 23:09:49,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:49,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-02-14 23:09:49,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:49,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125851002] [2022-02-14 23:09:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:49,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:49,855 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:49,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924460329] [2022-02-14 23:09:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:49,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:49,857 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 23:09:49,874 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 23:09:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 23:09:49,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:09:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 23:09:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:09:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 23:09:50,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:50,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125851002] [2022-02-14 23:09:50,392 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:09:50,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924460329] [2022-02-14 23:09:50,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924460329] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:09:50,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:09:50,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 23:09:50,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892984855] [2022-02-14 23:09:50,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:50,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:09:50,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:09:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:09:50,394 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:09:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:50,446 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-02-14 23:09:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:09:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-02-14 23:09:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:50,448 INFO L225 Difference]: With dead ends: 66 [2022-02-14 23:09:50,448 INFO L226 Difference]: Without dead ends: 66 [2022-02-14 23:09:50,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:09:50,449 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:50,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:09:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-14 23:09:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-02-14 23:09:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 23:09:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-02-14 23:09:50,455 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-02-14 23:09:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:50,455 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-02-14 23:09:50,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:09:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-02-14 23:09:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 23:09:50,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:50,457 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:50,482 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 23:09:50,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:50,676 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-02-14 23:09:50,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:50,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439342517] [2022-02-14 23:09:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:50,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:50,687 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:50,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793982077] [2022-02-14 23:09:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:50,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:50,691 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 23:09:50,720 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 23:09:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:50,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 23:09:50,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:09:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-14 23:09:50,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:09:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-02-14 23:09:51,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:51,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439342517] [2022-02-14 23:09:51,128 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:09:51,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793982077] [2022-02-14 23:09:51,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793982077] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:09:51,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:09:51,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-14 23:09:51,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108410585] [2022-02-14 23:09:51,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:51,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:09:51,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:09:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:09:51,130 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:09:51,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:51,193 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-02-14 23:09:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:09:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-02-14 23:09:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:51,194 INFO L225 Difference]: With dead ends: 74 [2022-02-14 23:09:51,194 INFO L226 Difference]: Without dead ends: 74 [2022-02-14 23:09:51,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:09:51,195 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:51,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:09:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-14 23:09:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-02-14 23:09:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 23:09:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-14 23:09:51,202 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-02-14 23:09:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:51,203 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-14 23:09:51,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:09:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-14 23:09:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-14 23:09:51,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:51,204 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:51,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 23:09:51,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:51,411 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-02-14 23:09:51,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:51,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442819725] [2022-02-14 23:09:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:51,420 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:51,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366966869] [2022-02-14 23:09:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:51,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:51,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:51,422 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 23:09:51,426 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 23:09:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:51,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:09:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:09:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-14 23:09:51,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:09:51,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:51,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442819725] [2022-02-14 23:09:51,596 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:09:51,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366966869] [2022-02-14 23:09:51,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366966869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:09:51,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:09:51,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:09:51,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018240453] [2022-02-14 23:09:51,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:09:51,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:09:51,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:09:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:09:51,599 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-14 23:09:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:51,652 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-02-14 23:09:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:09:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-02-14 23:09:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:51,654 INFO L225 Difference]: With dead ends: 77 [2022-02-14 23:09:51,654 INFO L226 Difference]: Without dead ends: 72 [2022-02-14 23:09:51,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:09:51,655 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:51,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:09:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-14 23:09:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-02-14 23:09:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 23:09:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-02-14 23:09:51,661 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-02-14 23:09:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-02-14 23:09:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-14 23:09:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-02-14 23:09:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-14 23:09:51,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:51,663 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:51,691 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 23:09:51,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:51,877 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:51,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-02-14 23:09:51,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:51,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980879715] [2022-02-14 23:09:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:51,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:51,891 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:51,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353859908] [2022-02-14 23:09:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:51,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:51,895 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 23:09:51,901 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 23:09:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:09:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 23:09:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:09:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-02-14 23:09:52,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:10:21,754 WARN L228 SmtUtils]: Spent 15.19s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:11:38,549 WARN L228 SmtUtils]: Spent 23.76s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:12:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-02-14 23:12:52,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:12:52,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980879715] [2022-02-14 23:12:52,278 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:12:52,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353859908] [2022-02-14 23:12:52,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353859908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:12:52,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:12:52,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-02-14 23:12:52,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096138362] [2022-02-14 23:12:52,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:12:52,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 23:12:52,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:12:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 23:12:52,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2022-02-14 23:12:52,280 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-02-14 23:12:54,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:07,968 WARN L228 SmtUtils]: Spent 12.85s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:13:34,449 WARN L228 SmtUtils]: Spent 22.92s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:13:36,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:44,592 WARN L228 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:13:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:51,385 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2022-02-14 23:13:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 23:13:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-02-14 23:13:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:51,387 INFO L225 Difference]: With dead ends: 121 [2022-02-14 23:13:51,387 INFO L226 Difference]: Without dead ends: 121 [2022-02-14 23:13:51,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 93.6s TimeCoverageRelationStatistics Valid=136, Invalid=513, Unknown=1, NotChecked=0, Total=650 [2022-02-14 23:13:51,388 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 68 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 142 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:51,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 285 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 358 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-02-14 23:13:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-14 23:13:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2022-02-14 23:13:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:13:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-02-14 23:13:51,396 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-02-14 23:13:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:51,396 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-02-14 23:13:51,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-02-14 23:13:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-02-14 23:13:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-14 23:13:51,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:51,398 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:51,419 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 23:13:51,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:51,603 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-02-14 23:13:51,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:51,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879745679] [2022-02-14 23:13:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:51,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:51,612 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:51,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26006901] [2022-02-14 23:13:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:51,614 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 23:13:51,635 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 23:13:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:51,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 23:13:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-14 23:13:51,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:13:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-14 23:13:52,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:52,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879745679] [2022-02-14 23:13:52,158 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:52,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26006901] [2022-02-14 23:13:52,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26006901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:13:52,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:13:52,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-02-14 23:13:52,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098559799] [2022-02-14 23:13:52,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:13:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 23:13:52,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 23:13:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:13:52,160 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 23:13:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:52,285 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2022-02-14 23:13:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:13:52,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-02-14 23:13:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:52,286 INFO L225 Difference]: With dead ends: 114 [2022-02-14 23:13:52,286 INFO L226 Difference]: Without dead ends: 114 [2022-02-14 23:13:52,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:13:52,287 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:52,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-14 23:13:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-02-14 23:13:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 23:13:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-02-14 23:13:52,294 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-02-14 23:13:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:52,294 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-02-14 23:13:52,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 23:13:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-02-14 23:13:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-14 23:13:52,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:52,296 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:52,314 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 23:13:52,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:52,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1406960063, now seen corresponding path program 2 times [2022-02-14 23:13:52,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:52,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954929934] [2022-02-14 23:13:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:52,508 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:52,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624180068] [2022-02-14 23:13:52,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:13:52,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:52,510 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 23:13:52,515 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 23:13:52,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:13:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:13:52,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:13:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-14 23:13:52,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:13:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-14 23:13:52,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:52,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954929934] [2022-02-14 23:13:52,878 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:52,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624180068] [2022-02-14 23:13:52,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624180068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:13:52,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:13:52,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-02-14 23:13:52,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881251580] [2022-02-14 23:13:52,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:13:52,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:13:52,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:13:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:52,880 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-14 23:13:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:52,949 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-02-14 23:13:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 23:13:52,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-02-14 23:13:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:52,952 INFO L225 Difference]: With dead ends: 111 [2022-02-14 23:13:52,952 INFO L226 Difference]: Without dead ends: 111 [2022-02-14 23:13:52,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:52,953 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:52,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-14 23:13:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-02-14 23:13:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 23:13:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-02-14 23:13:52,959 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-02-14 23:13:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:52,959 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-02-14 23:13:52,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-14 23:13:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-02-14 23:13:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 23:13:52,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:52,961 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:52,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:53,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:53,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:53,181 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-02-14 23:13:53,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:53,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125871526] [2022-02-14 23:13:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:53,189 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:53,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904758858] [2022-02-14 23:13:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:53,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:53,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:53,197 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 23:13:53,203 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 23:13:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:53,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 23:13:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-14 23:13:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:13:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-14 23:13:53,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:53,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125871526] [2022-02-14 23:13:53,863 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:53,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904758858] [2022-02-14 23:13:53,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904758858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:13:53,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:13:53,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-02-14 23:13:53,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349816266] [2022-02-14 23:13:53,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:13:53,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 23:13:53,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 23:13:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:13:53,866 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:13:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:54,114 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-02-14 23:13:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 23:13:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-02-14 23:13:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:54,116 INFO L225 Difference]: With dead ends: 117 [2022-02-14 23:13:54,116 INFO L226 Difference]: Without dead ends: 102 [2022-02-14 23:13:54,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:13:54,117 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:54,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 283 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:13:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-14 23:13:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-14 23:13:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:13:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-02-14 23:13:54,123 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-02-14 23:13:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:54,123 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-02-14 23:13:54,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:13:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-02-14 23:13:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-14 23:13:54,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:54,124 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:54,147 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 23:13:54,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 23:13:54,347 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1871497790, now seen corresponding path program 1 times [2022-02-14 23:13:54,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:54,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007899921] [2022-02-14 23:13:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:54,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:54,355 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:54,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248607924] [2022-02-14 23:13:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:54,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:54,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:54,359 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 23:13:54,360 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 23:13:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 23:13:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-02-14 23:13:54,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:13:54,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:54,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007899921] [2022-02-14 23:13:54,599 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:54,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248607924] [2022-02-14 23:13:54,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248607924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:54,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:54,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:13:54,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436173511] [2022-02-14 23:13:54,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:54,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:13:54,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:13:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:54,600 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-14 23:13:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:54,650 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-02-14 23:13:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:13:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-02-14 23:13:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:54,653 INFO L225 Difference]: With dead ends: 104 [2022-02-14 23:13:54,653 INFO L226 Difference]: Without dead ends: 104 [2022-02-14 23:13:54,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:54,654 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:54,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:13:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-14 23:13:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-14 23:13:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:13:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-02-14 23:13:54,668 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-02-14 23:13:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:54,669 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-02-14 23:13:54,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-14 23:13:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-02-14 23:13:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 23:13:54,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:54,671 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:54,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-14 23:13:54,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:54,886 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2022-02-14 23:13:54,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:54,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647268787] [2022-02-14 23:13:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:54,894 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:54,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864566185] [2022-02-14 23:13:54,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:13:54,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:54,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:54,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:13:54,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 23:13:54,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 23:13:54,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:13:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-14 23:13:54,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-02-14 23:13:55,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:14:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 31 proven. 50 refuted. 5 times theorem prover too weak. 288 trivial. 0 not checked. [2022-02-14 23:14:48,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:14:48,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647268787] [2022-02-14 23:14:48,567 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:14:48,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864566185] [2022-02-14 23:14:48,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864566185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:14:48,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:14:48,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-02-14 23:14:48,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015612009] [2022-02-14 23:14:48,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:14:48,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-14 23:14:48,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:14:48,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-14 23:14:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=417, Unknown=4, NotChecked=0, Total=506 [2022-02-14 23:14:48,569 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:15:58,466 WARN L228 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:16:00,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:16:01,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:16:04,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:16:06,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:18:45,640 WARN L228 SmtUtils]: Spent 2.60m on a formula simplification. DAG size of input: 172 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:18:47,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:19:52,793 WARN L228 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 195 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:19:54,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:19:56,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:20:00,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:20:08,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:20:10,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:20:15,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:20:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:20:15,826 INFO L93 Difference]: Finished difference Result 182 states and 237 transitions. [2022-02-14 23:20:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-14 23:20:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-02-14 23:20:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:20:15,829 INFO L225 Difference]: With dead ends: 182 [2022-02-14 23:20:15,829 INFO L226 Difference]: Without dead ends: 166 [2022-02-14 23:20:15,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 314.9s TimeCoverageRelationStatistics Valid=198, Invalid=919, Unknown=5, NotChecked=0, Total=1122 [2022-02-14 23:20:15,830 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 101 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 264 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-02-14 23:20:15,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 770 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 974 Invalid, 9 Unknown, 0 Unchecked, 29.9s Time] [2022-02-14 23:20:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-14 23:20:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 153. [2022-02-14 23:20:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 97 states have internal predecessors, (102), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-14 23:20:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2022-02-14 23:20:15,837 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 105 [2022-02-14 23:20:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:20:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2022-02-14 23:20:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:20:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2022-02-14 23:20:15,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-14 23:20:15,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:20:15,838 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:20:15,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 23:20:16,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 23:20:16,060 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:20:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:20:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-02-14 23:20:16,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:20:16,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016491957] [2022-02-14 23:20:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:20:16,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:20:16,079 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:20:16,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817904361] [2022-02-14 23:20:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:20:16,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:20:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:20:16,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:20:16,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 23:20:16,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:20:16,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:20:16,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-14 23:20:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:20:17,139 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:20:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-02-14 23:20:17,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:20:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-02-14 23:20:18,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:20:18,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016491957] [2022-02-14 23:20:18,432 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:20:18,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817904361] [2022-02-14 23:20:18,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817904361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:20:18,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:20:18,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-02-14 23:20:18,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821947599] [2022-02-14 23:20:18,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:20:18,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 23:20:18,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:20:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 23:20:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-14 23:20:18,434 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:20:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:20:19,653 INFO L93 Difference]: Finished difference Result 183 states and 223 transitions. [2022-02-14 23:20:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 23:20:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-02-14 23:20:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:20:19,655 INFO L225 Difference]: With dead ends: 183 [2022-02-14 23:20:19,655 INFO L226 Difference]: Without dead ends: 155 [2022-02-14 23:20:19,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-14 23:20:19,656 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 34 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:20:19,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 354 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-14 23:20:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-14 23:20:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 134. [2022-02-14 23:20:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 86 states have internal predecessors, (90), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2022-02-14 23:20:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2022-02-14 23:20:19,662 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 116 [2022-02-14 23:20:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:20:19,662 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2022-02-14 23:20:19,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:20:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2022-02-14 23:20:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-14 23:20:19,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:20:19,664 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:20:19,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 23:20:19,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 23:20:19,879 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:20:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:20:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash -715358301, now seen corresponding path program 4 times [2022-02-14 23:20:19,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:20:19,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167452124] [2022-02-14 23:20:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:20:19,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:20:19,888 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:20:19,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740415846] [2022-02-14 23:20:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 23:20:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:20:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:20:19,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:20:19,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 23:20:19,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 23:20:19,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:20:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-14 23:20:19,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:20:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-02-14 23:20:20,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:21:16,004 WARN L228 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:22:23,981 WARN L228 SmtUtils]: Spent 27.86s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:24:03,805 WARN L228 SmtUtils]: Spent 12.81s on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)