/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:50:10,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:50:10,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:50:10,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:50:10,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:50:10,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:50:10,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:50:10,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:50:10,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:50:10,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:50:10,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:50:10,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:50:10,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:50:10,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:50:10,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:50:10,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:50:10,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:50:10,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:50:10,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:50:10,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:50:10,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:50:10,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:50:10,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:50:10,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:50:10,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 14:50:10,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:50:10,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:50:10,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:50:10,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:50:10,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:50:10,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:50:10,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:50:10,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:50:10,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:50:10,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:50:10,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:50:10,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:50:10,789 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:50:10,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:50:10,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:50:10,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:50:10,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:50:10,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:50:10,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:50:10,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:50:10,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:50:10,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:50:10,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:50:10,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:50:10,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:50:10,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:50:10,793 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:50:10,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:50:10,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:50:10,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:50:10,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:50:10,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:50:11,002 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:50:11,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2022-01-31 14:50:11,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fc91b370/8b380902425044ab961cc3995dc65058/FLAGdf53538d7 [2022-01-31 14:50:11,390 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:50:11,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c [2022-01-31 14:50:11,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fc91b370/8b380902425044ab961cc3995dc65058/FLAGdf53538d7 [2022-01-31 14:50:11,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fc91b370/8b380902425044ab961cc3995dc65058 [2022-01-31 14:50:11,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:50:11,407 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:50:11,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:50:11,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:50:11,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:50:11,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd2fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11, skipping insertion in model container [2022-01-31 14:50:11,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:50:11,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:50:11,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2022-01-31 14:50:11,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:50:11,574 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:50:11,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound10.c[537,550] [2022-01-31 14:50:11,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:50:11,600 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:50:11,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11 WrapperNode [2022-01-31 14:50:11,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:50:11,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:50:11,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:50:11,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:50:11,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:50:11,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:50:11,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:50:11,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:50:11,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:50:11,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:11,657 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 14:50:11,668 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 14:50:11,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:50:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:50:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:50:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:50:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:50:11,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:50:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:50:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:50:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:50:11,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:50:11,741 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:50:11,742 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:50:11,858 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:50:11,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:50:11,863 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 14:50:11,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:50:11 BoogieIcfgContainer [2022-01-31 14:50:11,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:50:11,865 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:50:11,865 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:50:11,866 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:50:11,868 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:50:11" (1/1) ... [2022-01-31 14:50:11,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:50:11 BasicIcfg [2022-01-31 14:50:11,901 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:50:11,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:50:11,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:50:11,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:50:11,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:50:11" (1/4) ... [2022-01-31 14:50:11,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62472545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:50:11, skipping insertion in model container [2022-01-31 14:50:11,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:50:11" (2/4) ... [2022-01-31 14:50:11,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62472545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:50:11, skipping insertion in model container [2022-01-31 14:50:11,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:50:11" (3/4) ... [2022-01-31 14:50:11,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62472545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:50:11, skipping insertion in model container [2022-01-31 14:50:11,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:50:11" (4/4) ... [2022-01-31 14:50:11,905 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.cJordan [2022-01-31 14:50:11,908 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:50:11,908 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:50:11,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:50:11,941 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 14:50:11,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:50:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:50:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 14:50:11,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:11,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:11,955 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-01-31 14:50:11,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:11,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284208467] [2022-01-31 14:50:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:11,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:50:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:50:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,067 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 14:50:12,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:12,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284208467] [2022-01-31 14:50:12,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284208467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:12,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:12,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 14:50:12,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993340405] [2022-01-31 14:50:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:12,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 14:50:12,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 14:50:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:50:12,089 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 14:50:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:12,142 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-01-31 14:50:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 14:50:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 18 [2022-01-31 14:50:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:12,148 INFO L225 Difference]: With dead ends: 38 [2022-01-31 14:50:12,148 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 14:50:12,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:50:12,154 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:12,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:50:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 14:50:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-31 14:50:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 14:50:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-31 14:50:12,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-01-31 14:50:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-31 14:50:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 14:50:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-31 14:50:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 14:50:12,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:12,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:12,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 14:50:12,191 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:12,192 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-01-31 14:50:12,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870642120] [2022-01-31 14:50:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:12,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:50:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:50:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,320 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 14:50:12,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870642120] [2022-01-31 14:50:12,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870642120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:12,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:12,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:50:12,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028060947] [2022-01-31 14:50:12,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:12,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:50:12,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:12,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:50:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:50:12,323 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 14:50:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:12,463 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-01-31 14:50:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 14:50:12,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-01-31 14:50:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:12,465 INFO L225 Difference]: With dead ends: 45 [2022-01-31 14:50:12,465 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 14:50:12,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:50:12,469 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:12,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:50:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 14:50:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-01-31 14:50:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 14:50:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-01-31 14:50:12,479 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-01-31 14:50:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:12,479 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-01-31 14:50:12,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 14:50:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-01-31 14:50:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 14:50:12,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:12,480 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 14:50:12,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 14:50:12,480 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:12,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-01-31 14:50:12,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:12,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585307451] [2022-01-31 14:50:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:12,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:12,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:12,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805034080] [2022-01-31 14:50:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:12,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:12,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:12,491 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 14:50:12,492 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 14:50:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:50:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:12,599 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 14:50:12,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:50:12,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585307451] [2022-01-31 14:50:12,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805034080] [2022-01-31 14:50:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805034080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 14:50:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077706975] [2022-01-31 14:50:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 14:50:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 14:50:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:50:12,601 INFO L87 Difference]: Start difference. First operand 36 states and 45 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 14:50:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:12,609 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-01-31 14:50:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:50:12,609 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 14:50:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:12,610 INFO L225 Difference]: With dead ends: 38 [2022-01-31 14:50:12,610 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 14:50:12,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:50:12,610 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:12,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:50:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 14:50:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-31 14:50:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 14:50:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-01-31 14:50:12,615 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-01-31 14:50:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:12,615 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-01-31 14:50:12,615 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 14:50:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-01-31 14:50:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 14:50:12,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:12,616 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:12,642 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 14:50:12,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:12,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-01-31 14:50:12,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:12,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865427688] [2022-01-31 14:50:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:12,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:50:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:50:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 14:50:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 14:50:12,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:12,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865427688] [2022-01-31 14:50:12,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865427688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:12,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:12,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:50:12,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703613933] [2022-01-31 14:50:12,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:12,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:50:12,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:50:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:50:12,896 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:50:12,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:12,999 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-01-31 14:50:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 14:50:13,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-31 14:50:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:13,000 INFO L225 Difference]: With dead ends: 50 [2022-01-31 14:50:13,000 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 14:50:13,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:50:13,001 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:13,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:50:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 14:50:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-01-31 14:50:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 14:50:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-01-31 14:50:13,005 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-01-31 14:50:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:13,006 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-01-31 14:50:13,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:50:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-01-31 14:50:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 14:50:13,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:13,006 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:13,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 14:50:13,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-01-31 14:50:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183704983] [2022-01-31 14:50:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:13,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:13,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:13,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087315038] [2022-01-31 14:50:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:13,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:13,017 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 14:50:13,046 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 14:50:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:50:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:50:13,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:50:13,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:13,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183704983] [2022-01-31 14:50:13,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087315038] [2022-01-31 14:50:13,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087315038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:13,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:13,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:50:13,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130446650] [2022-01-31 14:50:13,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:13,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:50:13,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:50:13,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:50:13,118 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 14:50:15,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 14:50:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:15,311 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-01-31 14:50:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:50:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 14:50:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:15,312 INFO L225 Difference]: With dead ends: 57 [2022-01-31 14:50:15,312 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 14:50:15,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:50:15,313 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:15,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 14:50:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 14:50:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 14:50:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 14:50:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-01-31 14:50:15,317 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-01-31 14:50:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:15,317 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-01-31 14:50:15,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 14:50:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-01-31 14:50:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:50:15,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:15,318 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:15,334 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 14:50:15,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:15,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-01-31 14:50:15,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:15,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962775670] [2022-01-31 14:50:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:15,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:15,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181864885] [2022-01-31 14:50:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:15,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:15,543 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 14:50:15,544 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 14:50:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:50:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:50:15,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:50:15,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:15,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962775670] [2022-01-31 14:50:15,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:15,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181864885] [2022-01-31 14:50:15,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181864885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:15,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:15,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:50:15,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284303354] [2022-01-31 14:50:15,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:15,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:50:15,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:50:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:50:15,699 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 14:50:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:15,722 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-01-31 14:50:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:50:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-01-31 14:50:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:15,723 INFO L225 Difference]: With dead ends: 69 [2022-01-31 14:50:15,723 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 14:50:15,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:50:15,724 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:15,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:50:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 14:50:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-01-31 14:50:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 14:50:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-01-31 14:50:15,728 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-01-31 14:50:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:15,728 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-01-31 14:50:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 14:50:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-01-31 14:50:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:50:15,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:15,729 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:15,747 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 14:50:15,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:15,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-01-31 14:50:15,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572750041] [2022-01-31 14:50:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:15,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:15,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:15,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531322156] [2022-01-31 14:50:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:15,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:15,953 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 14:50:15,954 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 14:50:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 14:50:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:50:16,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:50:16,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572750041] [2022-01-31 14:50:16,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:16,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531322156] [2022-01-31 14:50:16,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531322156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:50:16,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:50:16,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:50:16,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55779285] [2022-01-31 14:50:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:16,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:50:16,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:50:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:50:16,151 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:50:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:16,251 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-01-31 14:50:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 14:50:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-01-31 14:50:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:16,253 INFO L225 Difference]: With dead ends: 80 [2022-01-31 14:50:16,253 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 14:50:16,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:50:16,253 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:16,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:50:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 14:50:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 14:50:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 14:50:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-01-31 14:50:16,274 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-01-31 14:50:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:16,274 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-01-31 14:50:16,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:50:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-01-31 14:50:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 14:50:16,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:16,275 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:16,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 14:50:16,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:16,476 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-01-31 14:50:16,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:16,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895759081] [2022-01-31 14:50:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:16,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:16,484 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889265413] [2022-01-31 14:50:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:16,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:16,495 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 14:50:16,500 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 14:50:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:16,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:50:16,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:50:16,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:50:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:50:16,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895759081] [2022-01-31 14:50:16,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:16,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889265413] [2022-01-31 14:50:16,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889265413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:50:16,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:50:16,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 14:50:16,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766724748] [2022-01-31 14:50:16,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:50:16,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 14:50:16,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 14:50:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:50:16,716 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-31 14:50:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:16,827 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2022-01-31 14:50:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:50:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-01-31 14:50:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:16,829 INFO L225 Difference]: With dead ends: 146 [2022-01-31 14:50:16,829 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 14:50:16,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:50:16,830 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:16,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 248 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:50:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 14:50:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-01-31 14:50:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 14:50:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-01-31 14:50:16,839 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-01-31 14:50:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:16,839 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-01-31 14:50:16,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-31 14:50:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-01-31 14:50:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 14:50:16,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:16,840 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:16,856 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 14:50:17,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:17,057 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-01-31 14:50:17,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:17,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244721559] [2022-01-31 14:50:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:17,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:17,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786366274] [2022-01-31 14:50:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:17,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:17,066 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 14:50:17,067 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 14:50:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 14:50:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 14:50:17,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:50:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 14:50:17,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244721559] [2022-01-31 14:50:17,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786366274] [2022-01-31 14:50:17,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786366274] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:50:17,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:50:17,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-01-31 14:50:17,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984241449] [2022-01-31 14:50:17,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:50:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:50:17,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:50:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:50:17,538 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 14:50:19,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:21,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:22,036 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2022-01-31 14:50:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:50:22,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-01-31 14:50:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:22,038 INFO L225 Difference]: With dead ends: 160 [2022-01-31 14:50:22,038 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 14:50:22,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:50:22,038 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:22,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 145 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 14:50:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 14:50:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-01-31 14:50:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 14:50:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-01-31 14:50:22,047 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-01-31 14:50:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:22,047 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-01-31 14:50:22,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 14:50:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-01-31 14:50:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 14:50:22,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:22,048 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:22,056 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 14:50:22,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:22,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-01-31 14:50:22,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:22,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090536419] [2022-01-31 14:50:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:22,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:22,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:22,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395509534] [2022-01-31 14:50:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:22,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:22,261 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 14:50:22,284 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 14:50:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:50:22,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:50:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:50:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 14:50:22,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:50:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 14:50:22,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:50:22,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090536419] [2022-01-31 14:50:22,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:50:22,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395509534] [2022-01-31 14:50:22,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395509534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:50:22,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:50:22,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 14:50:22,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420707351] [2022-01-31 14:50:22,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:50:22,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:50:22,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:50:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:50:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:50:22,544 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-01-31 14:50:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:50:22,797 INFO L93 Difference]: Finished difference Result 257 states and 309 transitions. [2022-01-31 14:50:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 14:50:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-01-31 14:50:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:50:22,799 INFO L225 Difference]: With dead ends: 257 [2022-01-31 14:50:22,799 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 14:50:22,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:50:22,800 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 102 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:50:22,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 250 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:50:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 14:50:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-01-31 14:50:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 14:50:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-01-31 14:50:22,810 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-01-31 14:50:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:50:22,810 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-01-31 14:50:22,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-01-31 14:50:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-01-31 14:50:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 14:50:22,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:50:22,811 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:50:22,827 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 14:50:23,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:23,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:50:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:50:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-01-31 14:50:23,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:50:23,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372742372] [2022-01-31 14:50:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:23,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:50:23,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:50:23,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344511940] [2022-01-31 14:50:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:50:23,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:50:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:50:23,046 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 14:50:23,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process