/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/array-programs/partial_mod_count_limited_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:23:52,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:23:52,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:23:52,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:23:52,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:23:52,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:23:52,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:23:52,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:23:52,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:23:52,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:23:52,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:23:52,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:23:52,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:23:52,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:23:52,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:23:52,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:23:52,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:23:52,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:23:52,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:23:52,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:23:52,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:23:52,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:23:52,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:23:52,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:23:52,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:23:52,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:23:52,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:23:52,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:23:52,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:23:52,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:23:52,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:23:52,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:23:52,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:23:52,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:23:52,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:23:52,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:23:52,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:23:52,792 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:23:52,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:23:52,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:23:52,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:23:52,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:23:52,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:23:52,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:23:52,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:23:52,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:23:52,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:23:52,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:23:52,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:23:52,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:23:52,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:23:52,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:23:52,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:23:52,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:23:52,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:23:52,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:23:52,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:23:52,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:23:52,797 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:23:52,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:23:52,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:23:52,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:23:52,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:23:52,987 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:23:52,987 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:23:52,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c [2022-01-31 09:23:53,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f959389/47c1af5bceee473c9f227433b013c8a5/FLAGb9f4e3f85 [2022-01-31 09:23:53,387 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:23:53,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c [2022-01-31 09:23:53,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f959389/47c1af5bceee473c9f227433b013c8a5/FLAGb9f4e3f85 [2022-01-31 09:23:53,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f959389/47c1af5bceee473c9f227433b013c8a5 [2022-01-31 09:23:53,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:23:53,404 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:23:53,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:23:53,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:23:53,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:23:53,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ac3c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53, skipping insertion in model container [2022-01-31 09:23:53,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:23:53,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:23:53,518 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c[331,344] [2022-01-31 09:23:53,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:23:53,540 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:23:53,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_4.c[331,344] [2022-01-31 09:23:53,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:23:53,579 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:23:53,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53 WrapperNode [2022-01-31 09:23:53,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:23:53,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:23:53,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:23:53,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:23:53,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:23:53,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:23:53,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:23:53,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:23:53,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:23:53,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:53,647 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) [2022-01-31 09:23:53,659 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 [2022-01-31 09:23:53,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:23:53,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:23:53,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:23:53,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:23:53,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:23:53,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:23:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:23:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:23:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:23:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:23:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:23:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:23:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:23:53,733 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:23:53,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:23:53,863 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:23:53,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:23:53,867 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:23:53,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:23:53 BoogieIcfgContainer [2022-01-31 09:23:53,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:23:53,871 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:23:53,871 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:23:53,872 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:23:53,874 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:23:53" (1/1) ... [2022-01-31 09:23:53,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:23:53 BasicIcfg [2022-01-31 09:23:53,892 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:23:53,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:23:53,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:23:53,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:23:53,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:23:53" (1/4) ... [2022-01-31 09:23:53,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aef3625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:23:53, skipping insertion in model container [2022-01-31 09:23:53,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:23:53" (2/4) ... [2022-01-31 09:23:53,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aef3625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:23:53, skipping insertion in model container [2022-01-31 09:23:53,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:23:53" (3/4) ... [2022-01-31 09:23:53,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aef3625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:23:53, skipping insertion in model container [2022-01-31 09:23:53,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:23:53" (4/4) ... [2022-01-31 09:23:53,919 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_4.cJordan [2022-01-31 09:23:53,922 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:23:53,923 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:23:53,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:23:53,957 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 [2022-01-31 09:23:53,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:23:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:23:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:23:53,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:53,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:53,983 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:53,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1836216133, now seen corresponding path program 1 times [2022-01-31 09:23:53,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:53,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149574715] [2022-01-31 09:23:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:53,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:54,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:54,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456856111] [2022-01-31 09:23:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:54,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:54,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:54,072 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) [2022-01-31 09:23:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:23:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:23:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 09:23:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:23:54,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:23:54,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:54,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149574715] [2022-01-31 09:23:54,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:54,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456856111] [2022-01-31 09:23:54,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456856111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:23:54,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:23:54,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 09:23:54,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028493227] [2022-01-31 09:23:54,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:23:54,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 09:23:54,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:54,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 09:23:54,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 09:23:54,226 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:23:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:54,238 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 09:23:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 09:23:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 09:23:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:54,245 INFO L225 Difference]: With dead ends: 33 [2022-01-31 09:23:54,245 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:23:54,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 09:23:54,249 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:54,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:23:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:23:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 09:23:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:23:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 09:23:54,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-31 09:23:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:54,275 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 09:23:54,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:23:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 09:23:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:23:54,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:54,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:54,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:23:54,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-31 09:23:54,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 35676921, now seen corresponding path program 1 times [2022-01-31 09:23:54,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:54,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960603076] [2022-01-31 09:23:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:54,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:54,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:54,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731082754] [2022-01-31 09:23:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:54,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:54,509 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) [2022-01-31 09:23:54,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:23:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:23:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:23:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:23:54,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:23:54,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:54,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960603076] [2022-01-31 09:23:54,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:54,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731082754] [2022-01-31 09:23:54,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731082754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:23:54,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:23:54,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:23:54,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639799529] [2022-01-31 09:23:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:23:54,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:23:54,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:23:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:23:54,686 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:23:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:54,739 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-31 09:23:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:23:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 09:23:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:54,742 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:23:54,742 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:23:54,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:23:54,743 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:54,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:23:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:23:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-31 09:23:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:23:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:23:54,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-31 09:23:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:54,749 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:23:54,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:23:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:23:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:23:54,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:54,750 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 09:23:54,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:23:54,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-31 09:23:54,960 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash -168804664, now seen corresponding path program 1 times [2022-01-31 09:23:54,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429311036] [2022-01-31 09:23:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:54,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:54,982 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:54,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563382490] [2022-01-31 09:23:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:54,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:54,988 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) [2022-01-31 09:23:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:23:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:23:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:23:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:23:55,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:23:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:23:55,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:55,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429311036] [2022-01-31 09:23:55,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:55,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563382490] [2022-01-31 09:23:55,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563382490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:23:55,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:23:55,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 09:23:55,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573986666] [2022-01-31 09:23:55,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:23:55,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:23:55,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:23:55,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:23:55,221 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:23:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:55,363 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-01-31 09:23:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:23:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-31 09:23:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:55,367 INFO L225 Difference]: With dead ends: 57 [2022-01-31 09:23:55,367 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 09:23:55,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:23:55,371 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:55,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:23:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 09:23:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-31 09:23:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:23:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-31 09:23:55,379 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-31 09:23:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:55,379 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-31 09:23:55,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:23:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-31 09:23:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:23:55,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:55,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:55,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:23:55,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:55,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:55,582 INFO L85 PathProgramCache]: Analyzing trace with hash -760694183, now seen corresponding path program 1 times [2022-01-31 09:23:55,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:55,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647025153] [2022-01-31 09:23:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:55,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:55,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131279538] [2022-01-31 09:23:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:55,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:55,601 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) [2022-01-31 09:23:55,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:23:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:23:55,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:23:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:23:55,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:23:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:23:55,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647025153] [2022-01-31 09:23:55,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131279538] [2022-01-31 09:23:55,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131279538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:23:55,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:23:55,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:23:55,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360638013] [2022-01-31 09:23:55,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:23:55,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:23:55,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:23:55,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:23:55,916 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:23:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:56,224 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2022-01-31 09:23:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:23:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-31 09:23:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:56,225 INFO L225 Difference]: With dead ends: 111 [2022-01-31 09:23:56,225 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 09:23:56,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:23:56,226 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:56,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 100 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:23:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 09:23:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2022-01-31 09:23:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:23:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-31 09:23:56,234 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-31 09:23:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:56,234 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-31 09:23:56,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:23:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-31 09:23:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:23:56,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:56,235 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:56,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:23:56,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:56,451 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash 961270586, now seen corresponding path program 2 times [2022-01-31 09:23:56,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:56,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520793830] [2022-01-31 09:23:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:56,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:56,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312333267] [2022-01-31 09:23:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:23:56,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:56,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:56,480 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) [2022-01-31 09:23:56,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:23:56,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 09:23:56,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:23:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 09:23:56,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-31 09:23:56,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:23:56,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:56,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520793830] [2022-01-31 09:23:56,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:56,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312333267] [2022-01-31 09:23:56,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312333267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:23:56,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:23:56,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:23:56,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309680912] [2022-01-31 09:23:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:23:56,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:23:56,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:23:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:23:56,878 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:23:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:56,941 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-01-31 09:23:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:23:56,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-31 09:23:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:56,942 INFO L225 Difference]: With dead ends: 86 [2022-01-31 09:23:56,942 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 09:23:56,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:23:56,943 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:56,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 100 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:23:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 09:23:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 09:23:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:23:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-01-31 09:23:56,948 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 70 [2022-01-31 09:23:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:56,948 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-01-31 09:23:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:23:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-01-31 09:23:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:23:56,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:56,950 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:56,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:23:57,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:57,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 265270041, now seen corresponding path program 1 times [2022-01-31 09:23:57,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:57,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538724118] [2022-01-31 09:23:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:57,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:57,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:57,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786809195] [2022-01-31 09:23:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:57,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:57,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:57,208 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) [2022-01-31 09:23:57,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:23:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:23:57,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:23:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:23:57,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:23:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:23:57,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:23:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538724118] [2022-01-31 09:23:57,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:23:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786809195] [2022-01-31 09:23:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786809195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:23:57,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:23:57,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:23:57,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396573241] [2022-01-31 09:23:57,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:23:57,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:23:57,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:23:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:23:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:23:57,768 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:23:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:23:58,330 INFO L93 Difference]: Finished difference Result 393 states and 553 transitions. [2022-01-31 09:23:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:23:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-31 09:23:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:23:58,334 INFO L225 Difference]: With dead ends: 393 [2022-01-31 09:23:58,334 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 09:23:58,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:23:58,335 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 674 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:23:58,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 167 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:23:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 09:23:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-31 09:23:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:23:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-01-31 09:23:58,358 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2022-01-31 09:23:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:23:58,358 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-01-31 09:23:58,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:23:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-01-31 09:23:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 09:23:58,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:23:58,359 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:23:58,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:23:58,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:58,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:23:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:23:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash 195391865, now seen corresponding path program 2 times [2022-01-31 09:23:58,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:23:58,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643202504] [2022-01-31 09:23:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:23:58,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:23:58,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:23:58,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331943867] [2022-01-31 09:23:58,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:23:58,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:23:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:23:58,596 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) [2022-01-31 09:23:58,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:23:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:23:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:23:58,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:23:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:23:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:23:59,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:24:00,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643202504] [2022-01-31 09:24:00,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:00,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331943867] [2022-01-31 09:24:00,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331943867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:00,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:00,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 09:24:00,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878762257] [2022-01-31 09:24:00,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:00,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:24:00,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:24:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:24:00,148 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:24:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:24:01,807 INFO L93 Difference]: Finished difference Result 801 states and 1141 transitions. [2022-01-31 09:24:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:24:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-31 09:24:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:24:01,811 INFO L225 Difference]: With dead ends: 801 [2022-01-31 09:24:01,811 INFO L226 Difference]: Without dead ends: 801 [2022-01-31 09:24:01,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:24:01,813 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1227 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:24:01,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 224 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 09:24:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-31 09:24:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 266. [2022-01-31 09:24:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:24:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-01-31 09:24:01,841 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 138 [2022-01-31 09:24:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:24:01,841 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-01-31 09:24:01,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:24:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-01-31 09:24:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 09:24:01,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:24:01,851 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:24:01,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:24:02,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:02,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:24:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:24:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -771955143, now seen corresponding path program 3 times [2022-01-31 09:24:02,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:24:02,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606035292] [2022-01-31 09:24:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:02,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:24:02,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:24:02,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011975369] [2022-01-31 09:24:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:24:02,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:02,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:24:02,097 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) [2022-01-31 09:24:02,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:24:02,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 09:24:02,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:24:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:24:02,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 09:24:03,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-31 09:24:23,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606035292] [2022-01-31 09:24:23,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011975369] [2022-01-31 09:24:23,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011975369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:23,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:23,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-31 09:24:23,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015757241] [2022-01-31 09:24:23,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:23,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 09:24:23,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 09:24:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=88, Unknown=7, NotChecked=0, Total=132 [2022-01-31 09:24:23,094 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:24:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:24:29,743 INFO L93 Difference]: Finished difference Result 286 states and 367 transitions. [2022-01-31 09:24:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 09:24:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 258 [2022-01-31 09:24:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:24:29,745 INFO L225 Difference]: With dead ends: 286 [2022-01-31 09:24:29,745 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 09:24:29,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=79, Invalid=183, Unknown=10, NotChecked=0, Total=272 [2022-01-31 09:24:29,746 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 129 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:24:29,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 144 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:24:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 09:24:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-01-31 09:24:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 270 states have (on average 1.288888888888889) internal successors, (348), 270 states have internal predecessors, (348), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:24:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2022-01-31 09:24:29,753 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 258 [2022-01-31 09:24:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:24:29,754 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2022-01-31 09:24:29,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:24:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2022-01-31 09:24:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 09:24:29,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:24:29,784 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:24:29,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:24:29,988 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,SelfDestructingSolverStorable7 [2022-01-31 09:24:29,991 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:24:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:24:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1258893387, now seen corresponding path program 4 times [2022-01-31 09:24:29,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:24:29,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517130355] [2022-01-31 09:24:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:29,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:24:30,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:24:30,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037961465] [2022-01-31 09:24:30,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:24:30,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:30,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:24:30,030 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) [2022-01-31 09:24:30,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:24:30,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:24:30,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:24:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:24:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:30,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-31 09:24:30,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:24:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 399 proven. 4 refuted. 0 times theorem prover too weak. 4923 trivial. 0 not checked. [2022-01-31 09:24:30,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 409 proven. 4 refuted. 0 times theorem prover too weak. 4913 trivial. 0 not checked. [2022-01-31 09:24:30,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517130355] [2022-01-31 09:24:30,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037961465] [2022-01-31 09:24:30,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037961465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:30,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:30,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 09:24:30,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671384482] [2022-01-31 09:24:30,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:30,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 09:24:30,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 09:24:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-31 09:24:30,948 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:24:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:24:31,132 INFO L93 Difference]: Finished difference Result 334 states and 435 transitions. [2022-01-31 09:24:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:24:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 290 [2022-01-31 09:24:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:24:31,134 INFO L225 Difference]: With dead ends: 334 [2022-01-31 09:24:31,134 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 09:24:31,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:24:31,135 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:24:31,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 156 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:24:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 09:24:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 286. [2022-01-31 09:24:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 270 states have (on average 1.2740740740740741) internal successors, (344), 270 states have internal predecessors, (344), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:24:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 363 transitions. [2022-01-31 09:24:31,142 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 363 transitions. Word has length 290 [2022-01-31 09:24:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:24:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 363 transitions. [2022-01-31 09:24:31,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:24:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 363 transitions. [2022-01-31 09:24:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 09:24:31,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:24:31,145 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 42, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:24:31,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:24:31,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:31,363 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:24:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:24:31,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1720983947, now seen corresponding path program 1 times [2022-01-31 09:24:31,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:24:31,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256806653] [2022-01-31 09:24:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:31,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:24:31,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:24:31,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817310613] [2022-01-31 09:24:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:31,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:24:31,400 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) [2022-01-31 09:24:31,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:24:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:24:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 09:24:31,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:24:33,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 10 proven. 5221 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:24:37,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:37,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256806653] [2022-01-31 09:24:37,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:37,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817310613] [2022-01-31 09:24:37,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817310613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:37,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:37,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 09:24:37,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095163550] [2022-01-31 09:24:37,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:37,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 09:24:37,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 09:24:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 09:24:37,337 INFO L87 Difference]: Start difference. First operand 286 states and 363 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:24:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:24:47,626 INFO L93 Difference]: Finished difference Result 3065 states and 4480 transitions. [2022-01-31 09:24:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 09:24:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 290 [2022-01-31 09:24:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:24:47,636 INFO L225 Difference]: With dead ends: 3065 [2022-01-31 09:24:47,636 INFO L226 Difference]: Without dead ends: 3065 [2022-01-31 09:24:47,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 09:24:47,640 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4228 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 1532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4275 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1532 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:24:47,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4275 Valid, 423 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1532 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 09:24:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-01-31 09:24:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 526. [2022-01-31 09:24:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 510 states have (on average 1.2862745098039217) internal successors, (656), 510 states have internal predecessors, (656), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:24:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 675 transitions. [2022-01-31 09:24:47,705 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 675 transitions. Word has length 290 [2022-01-31 09:24:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:24:47,705 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 675 transitions. [2022-01-31 09:24:47,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:24:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 675 transitions. [2022-01-31 09:24:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 09:24:47,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:24:47,709 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:24:47,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:24:47,910 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,SelfDestructingSolverStorable9 [2022-01-31 09:24:47,910 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:24:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:24:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash -648402955, now seen corresponding path program 2 times [2022-01-31 09:24:47,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:24:47,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386540642] [2022-01-31 09:24:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:47,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:24:47,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:24:47,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712757838] [2022-01-31 09:24:47,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:24:47,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:47,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:24:47,960 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) [2022-01-31 09:24:47,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:24:48,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:24:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:24:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 09:24:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22054 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:24:53,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22054 backedges. 10 proven. 21949 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-31 09:25:18,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386540642] [2022-01-31 09:25:18,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712757838] [2022-01-31 09:25:18,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712757838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:18,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:18,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 09:25:18,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302526623] [2022-01-31 09:25:18,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:18,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 09:25:18,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 09:25:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 09:25:18,942 INFO L87 Difference]: Start difference. First operand 526 states and 675 transitions. Second operand has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:27:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:04,372 INFO L93 Difference]: Finished difference Result 6233 states and 9136 transitions. [2022-01-31 09:27:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 09:27:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 530 [2022-01-31 09:27:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:04,393 INFO L225 Difference]: With dead ends: 6233 [2022-01-31 09:27:04,393 INFO L226 Difference]: Without dead ends: 6233 [2022-01-31 09:27:04,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 103.0s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 09:27:04,399 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7415 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 2884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7510 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2884 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:04,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7510 Valid, 836 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2884 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-01-31 09:27:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2022-01-31 09:27:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 1006. [2022-01-31 09:27:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 990 states have (on average 1.292929292929293) internal successors, (1280), 990 states have internal predecessors, (1280), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:27:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1299 transitions. [2022-01-31 09:27:04,525 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1299 transitions. Word has length 530 [2022-01-31 09:27:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:04,525 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1299 transitions. [2022-01-31 09:27:04,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.989690721649485) internal successors, (968), 194 states have internal predecessors, (968), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:27:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1299 transitions. [2022-01-31 09:27:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:27:04,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:04,533 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:27:04,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:27:04,749 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,SelfDestructingSolverStorable10 [2022-01-31 09:27:04,749 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1117141749, now seen corresponding path program 3 times [2022-01-31 09:27:04,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:04,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056675640] [2022-01-31 09:27:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:04,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:04,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:27:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281520280] [2022-01-31 09:27:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:27:04,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:04,840 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) [2022-01-31 09:27:04,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:27:05,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:27:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:05,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:27:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:08,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-31 09:27:08,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-31 09:27:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 189 proven. 757 refuted. 0 times theorem prover too weak. 89124 trivial. 0 not checked. [2022-01-31 09:27:08,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:28:41,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:28:41,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056675640] [2022-01-31 09:28:41,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:28:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281520280] [2022-01-31 09:28:41,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281520280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:28:41,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:28:41,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 09:28:41,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127419331] [2022-01-31 09:28:41,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 09:28:41,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:28:41,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:28:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:28:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=152, Unknown=2, NotChecked=0, Total=210 [2022-01-31 09:28:41,258 INFO L87 Difference]: Start difference. First operand 1006 states and 1299 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:28:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:28:41,789 INFO L93 Difference]: Finished difference Result 2252 states and 2930 transitions. [2022-01-31 09:28:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 09:28:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 1010 [2022-01-31 09:28:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:28:41,799 INFO L225 Difference]: With dead ends: 2252 [2022-01-31 09:28:41,799 INFO L226 Difference]: Without dead ends: 2252 [2022-01-31 09:28:41,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2016 GetRequests, 1996 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=156, Invalid=304, Unknown=2, NotChecked=0, Total=462 [2022-01-31 09:28:41,801 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:28:41,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 83 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:28:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2022-01-31 09:28:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1010. [2022-01-31 09:28:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 994 states have (on average 1.2937625754527162) internal successors, (1286), 994 states have internal predecessors, (1286), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:28:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1305 transitions. [2022-01-31 09:28:41,818 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1305 transitions. Word has length 1010 [2022-01-31 09:28:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:28:41,819 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1305 transitions. [2022-01-31 09:28:41,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:28:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1305 transitions. [2022-01-31 09:28:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:28:41,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:28:41,826 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 184, 95, 95, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:28:41,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:28:42,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:28:42,031 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:28:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:28:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1569994325, now seen corresponding path program 4 times [2022-01-31 09:28:42,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:28:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044870523] [2022-01-31 09:28:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:28:42,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:28:42,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:28:42,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305941416] [2022-01-31 09:28:42,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:28:42,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:28:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:28:42,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:28:42,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:28:42,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:28:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:28:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:28:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:28:42,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 09:28:42,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-31 09:28:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 4491 proven. 4 refuted. 0 times theorem prover too weak. 85575 trivial. 0 not checked. [2022-01-31 09:28:43,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:28:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 90070 backedges. 4493 proven. 12 refuted. 0 times theorem prover too weak. 85565 trivial. 0 not checked. [2022-01-31 09:28:45,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:28:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044870523] [2022-01-31 09:28:45,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:28:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305941416] [2022-01-31 09:28:45,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305941416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:28:45,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:28:45,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 09:28:45,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686171350] [2022-01-31 09:28:45,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:28:45,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:28:45,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:28:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:28:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:28:45,054 INFO L87 Difference]: Start difference. First operand 1010 states and 1305 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:28:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:28:45,694 INFO L93 Difference]: Finished difference Result 1339 states and 1565 transitions. [2022-01-31 09:28:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:28:45,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 1010 [2022-01-31 09:28:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:28:45,703 INFO L225 Difference]: With dead ends: 1339 [2022-01-31 09:28:45,703 INFO L226 Difference]: Without dead ends: 1339 [2022-01-31 09:28:45,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2028 GetRequests, 2005 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:28:45,706 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:28:45,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 144 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 09:28:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-01-31 09:28:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1196. [2022-01-31 09:28:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1180 states have (on average 1.1686440677966101) internal successors, (1379), 1180 states have internal predecessors, (1379), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:28:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1398 transitions. [2022-01-31 09:28:45,718 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1398 transitions. Word has length 1010 [2022-01-31 09:28:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:28:45,718 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1398 transitions. [2022-01-31 09:28:45,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:28:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1398 transitions. [2022-01-31 09:28:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2022-01-31 09:28:45,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:28:45,725 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 97, 95, 95, 93, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:28:45,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:28:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:28:45,939 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:28:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:28:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1561861302, now seen corresponding path program 5 times [2022-01-31 09:28:45,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:28:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5952830] [2022-01-31 09:28:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:28:45,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:28:46,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:28:46,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423521751] [2022-01-31 09:28:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:28:46,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:28:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:28:46,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:28:46,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process