/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/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:09:51,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:09:51,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:09:51,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:09:51,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:09:51,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:09:51,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:09:51,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:09:51,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:09:51,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:09:51,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:09:51,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:09:51,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:09:51,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:09:51,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:09:51,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:09:51,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:09:51,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:09:51,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:09:51,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:09:51,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:09:51,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:09:51,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:09:51,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:09:51,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:09:51,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:09:51,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:09:51,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:09:51,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:09:51,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:09:51,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:09:51,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:09:51,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:09:51,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:09:51,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:09:51,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:09:51,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:09:51,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:09:51,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:09:51,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:09:51,784 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:09:51,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:09:51,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:09:51,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:09:51,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:09:51,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:09:51,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:09:51,785 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:09:51,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:09:51,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:09:51,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:09:51,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:09:51,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:09:51,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:09:51,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:09:51,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:09:51,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:09:51,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:09:51,787 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:09:51,787 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:09:51,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:09:51,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:09:52,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:09:52,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:09:52,002 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:09:52,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-02-23 18:09:52,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d4ee41a/f3c0fb22f8254f1c903abea5470671c2/FLAG6a390368a [2022-02-23 18:09:52,447 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:09:52,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-02-23 18:09:52,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d4ee41a/f3c0fb22f8254f1c903abea5470671c2/FLAG6a390368a [2022-02-23 18:09:52,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7d4ee41a/f3c0fb22f8254f1c903abea5470671c2 [2022-02-23 18:09:52,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:09:52,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:09:52,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:09:52,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:09:52,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:09:52,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:09:52" (1/1) ... [2022-02-23 18:09:52,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7c0104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:52, skipping insertion in model container [2022-02-23 18:09:52,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:09:52" (1/1) ... [2022-02-23 18:09:52,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:09:52,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:09:53,017 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/egcd3-ll_unwindbound5.c[490,503] [2022-02-23 18:09:53,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:09:53,058 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:09:53,066 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/egcd3-ll_unwindbound5.c[490,503] [2022-02-23 18:09:53,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:09:53,084 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:09:53,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53 WrapperNode [2022-02-23 18:09:53,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:09:53,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:09:53,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:09:53,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:09:53,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:09:53,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:09:53,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:09:53,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:09:53,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:09:53,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:53,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 18:09:53,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 18:09:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:09:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:09:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:09:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:09:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:09:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:09:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:09:53,170 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:09:53,170 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:09:53,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:09:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:09:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:09:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:09:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:09:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:09:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:09:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:09:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:09:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:09:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:09:53,225 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:09:53,226 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:09:53,414 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:09:53,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:09:53,419 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 18:09:53,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:53 BoogieIcfgContainer [2022-02-23 18:09:53,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:09:53,421 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:09:53,421 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:09:53,436 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:09:53,438 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:53" (1/1) ... [2022-02-23 18:09:53,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:09:53 BasicIcfg [2022-02-23 18:09:53,463 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:09:53,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:09:53,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:09:53,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:09:53,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:09:52" (1/4) ... [2022-02-23 18:09:53,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0223f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:09:53, skipping insertion in model container [2022-02-23 18:09:53,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:53" (2/4) ... [2022-02-23 18:09:53,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0223f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:09:53, skipping insertion in model container [2022-02-23 18:09:53,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:53" (3/4) ... [2022-02-23 18:09:53,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0223f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:09:53, skipping insertion in model container [2022-02-23 18:09:53,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:09:53" (4/4) ... [2022-02-23 18:09:53,474 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.cJordan [2022-02-23 18:09:53,478 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:09:53,479 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:09:53,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:09:53,534 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 18:09:53,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:09:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:09:53,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 18:09:53,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:53,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:53,565 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:53,570 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-02-23 18:09:53,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:53,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448159816] [2022-02-23 18:09:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:53,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:09:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:53,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:09:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:53,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 18:09:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:53,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:53,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448159816] [2022-02-23 18:09:53,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448159816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:53,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:53,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:09:53,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342850115] [2022-02-23 18:09:53,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:53,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:09:53,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:09:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:09:53,844 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:53,935 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-02-23 18:09:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:09:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 18:09:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:53,945 INFO L225 Difference]: With dead ends: 41 [2022-02-23 18:09:53,945 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 18:09:53,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:09:53,950 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:53,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 18:09:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-23 18:09:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:09:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-02-23 18:09:53,987 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-02-23 18:09:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:53,987 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-02-23 18:09:53,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-02-23 18:09:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 18:09:53,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:53,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:53,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:09:53,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:53,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-02-23 18:09:53,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:53,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003518192] [2022-02-23 18:09:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:53,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:54,021 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:54,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021024120] [2022-02-23 18:09:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:54,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:54,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:54,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:54,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:09:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:09:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:54,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:54,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:54,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003518192] [2022-02-23 18:09:54,234 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:54,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021024120] [2022-02-23 18:09:54,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021024120] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:54,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:54,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:09:54,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417704179] [2022-02-23 18:09:54,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:54,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:09:54,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:09:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:09:54,238 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:54,252 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-02-23 18:09:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:09:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 18:09:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:54,253 INFO L225 Difference]: With dead ends: 37 [2022-02-23 18:09:54,253 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 18:09:54,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:09:54,255 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:54,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 18:09:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-23 18:09:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:09:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-02-23 18:09:54,261 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-02-23 18:09:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:54,262 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-02-23 18:09:54,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-02-23 18:09:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 18:09:54,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:54,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:54,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:54,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:54,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-02-23 18:09:54,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:54,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429303250] [2022-02-23 18:09:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:54,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:54,489 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:54,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255260883] [2022-02-23 18:09:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:54,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:54,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:54,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:09:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:54,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:09:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 18:09:54,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:54,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:54,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429303250] [2022-02-23 18:09:54,622 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:54,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255260883] [2022-02-23 18:09:54,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255260883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:54,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:54,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:09:54,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508870722] [2022-02-23 18:09:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:54,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:09:54,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:54,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:09:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:09:54,624 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:09:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:54,683 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-02-23 18:09:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:09:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-23 18:09:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:54,685 INFO L225 Difference]: With dead ends: 50 [2022-02-23 18:09:54,685 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 18:09:54,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:09:54,686 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:54,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 18:09:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-02-23 18:09:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:09:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-02-23 18:09:54,693 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-02-23 18:09:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:54,693 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-02-23 18:09:54,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:09:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-02-23 18:09:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 18:09:54,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:54,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:54,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:54,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 18:09:54,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-02-23 18:09:54,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:54,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564892241] [2022-02-23 18:09:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:54,931 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:54,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235137423] [2022-02-23 18:09:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:54,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:54,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:09:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:09:54,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:55,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:55,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:55,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564892241] [2022-02-23 18:09:55,054 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:55,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235137423] [2022-02-23 18:09:55,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235137423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:55,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:55,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:09:55,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713441024] [2022-02-23 18:09:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:55,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:55,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:09:55,056 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:55,091 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-02-23 18:09:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:09:55,093 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-23 18:09:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:55,094 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:09:55,094 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 18:09:55,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:09:55,095 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:55,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 18:09:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-23 18:09:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:09:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-02-23 18:09:55,109 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-02-23 18:09:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:55,109 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-02-23 18:09:55,109 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-02-23 18:09:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 18:09:55,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:55,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:55,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:55,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:55,311 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-02-23 18:09:55,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:55,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515885342] [2022-02-23 18:09:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:55,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:55,329 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:55,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157072014] [2022-02-23 18:09:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:55,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:55,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:55,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:55,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:09:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:09:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 18:09:55,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:55,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:55,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515885342] [2022-02-23 18:09:55,675 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:55,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157072014] [2022-02-23 18:09:55,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157072014] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:55,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:55,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 18:09:55,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471971349] [2022-02-23 18:09:55,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:55,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:09:55,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:09:55,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:55,679 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:09:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:55,868 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-02-23 18:09:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:09:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-02-23 18:09:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:55,870 INFO L225 Difference]: With dead ends: 66 [2022-02-23 18:09:55,870 INFO L226 Difference]: Without dead ends: 66 [2022-02-23 18:09:55,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:55,871 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:55,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 290 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-23 18:09:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-02-23 18:09:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 18:09:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-02-23 18:09:55,879 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-02-23 18:09:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:55,880 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-02-23 18:09:55,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:09:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-02-23 18:09:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 18:09:55,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:55,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:55,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:56,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:56,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-02-23 18:09:56,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:56,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11299459] [2022-02-23 18:09:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:56,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:56,118 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:56,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533635272] [2022-02-23 18:09:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:56,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:56,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:56,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:56,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:09:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:09:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:56,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:56,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:56,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11299459] [2022-02-23 18:09:56,335 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:56,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533635272] [2022-02-23 18:09:56,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533635272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:56,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:56,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-23 18:09:56,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104199658] [2022-02-23 18:09:56,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:56,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:09:56,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:56,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:09:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:56,337 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 18:09:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:56,418 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-02-23 18:09:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:09:56,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-02-23 18:09:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:56,423 INFO L225 Difference]: With dead ends: 109 [2022-02-23 18:09:56,423 INFO L226 Difference]: Without dead ends: 109 [2022-02-23 18:09:56,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:56,426 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 62 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:56,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 250 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-23 18:09:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2022-02-23 18:09:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.318840579710145) internal successors, (91), 72 states have internal predecessors, (91), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 18:09:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2022-02-23 18:09:56,448 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 30 [2022-02-23 18:09:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:56,448 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2022-02-23 18:09:56,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 18:09:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2022-02-23 18:09:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 18:09:56,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:56,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:56,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:56,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-02-23 18:09:56,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:56,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738564162] [2022-02-23 18:09:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:56,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:56,686 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:56,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456674678] [2022-02-23 18:09:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:56,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:56,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:56,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:56,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:09:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:09:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 18:09:56,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 18:09:56,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:56,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738564162] [2022-02-23 18:09:56,924 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:56,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456674678] [2022-02-23 18:09:56,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456674678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:56,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:56,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:09:56,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769081716] [2022-02-23 18:09:56,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:56,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:09:56,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:09:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:56,926 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:57,089 INFO L93 Difference]: Finished difference Result 174 states and 249 transitions. [2022-02-23 18:09:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:09:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-02-23 18:09:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:57,093 INFO L225 Difference]: With dead ends: 174 [2022-02-23 18:09:57,093 INFO L226 Difference]: Without dead ends: 174 [2022-02-23 18:09:57,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:09:57,094 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:57,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 362 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-23 18:09:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2022-02-23 18:09:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 18:09:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-02-23 18:09:57,106 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 31 [2022-02-23 18:09:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:57,107 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-02-23 18:09:57,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-02-23 18:09:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 18:09:57,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:57,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:57,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:57,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:57,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-02-23 18:09:57,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:57,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913866680] [2022-02-23 18:09:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:57,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:57,334 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:57,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810617190] [2022-02-23 18:09:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:57,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:57,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:57,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:09:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:57,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:09:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 18:09:57,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:57,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:57,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913866680] [2022-02-23 18:09:57,612 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:57,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810617190] [2022-02-23 18:09:57,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810617190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:57,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:57,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 18:09:57,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524906024] [2022-02-23 18:09:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:57,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:09:57,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:09:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:57,613 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 18:09:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:57,791 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2022-02-23 18:09:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:09:57,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-02-23 18:09:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:57,793 INFO L225 Difference]: With dead ends: 154 [2022-02-23 18:09:57,793 INFO L226 Difference]: Without dead ends: 154 [2022-02-23 18:09:57,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:09:57,794 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 67 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:57,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 309 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-23 18:09:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2022-02-23 18:09:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.3113207547169812) internal successors, (139), 108 states have internal predecessors, (139), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 18:09:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2022-02-23 18:09:57,803 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 34 [2022-02-23 18:09:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:57,803 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2022-02-23 18:09:57,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 18:09:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2022-02-23 18:09:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 18:09:57,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:57,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:57,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 18:09:58,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:58,020 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-02-23 18:09:58,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:58,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126027107] [2022-02-23 18:09:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:58,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:58,032 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:58,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982834835] [2022-02-23 18:09:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:58,035 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:58,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:09:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 18:09:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 18:09:58,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:58,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:58,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126027107] [2022-02-23 18:09:58,400 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:58,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982834835] [2022-02-23 18:09:58,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982834835] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:58,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:58,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-02-23 18:09:58,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520558774] [2022-02-23 18:09:58,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:58,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:09:58,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:09:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:58,405 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:09:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:58,552 INFO L93 Difference]: Finished difference Result 176 states and 237 transitions. [2022-02-23 18:09:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:09:58,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 18:09:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:58,558 INFO L225 Difference]: With dead ends: 176 [2022-02-23 18:09:58,558 INFO L226 Difference]: Without dead ends: 176 [2022-02-23 18:09:58,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:58,560 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 84 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:58,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 388 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-23 18:09:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2022-02-23 18:09:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 129 states have internal predecessors, (170), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 18:09:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 234 transitions. [2022-02-23 18:09:58,578 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 234 transitions. Word has length 36 [2022-02-23 18:09:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:58,579 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 234 transitions. [2022-02-23 18:09:58,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:09:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 234 transitions. [2022-02-23 18:09:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 18:09:58,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:58,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:58,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:58,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 18:09:58,796 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-02-23 18:09:58,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:58,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132861518] [2022-02-23 18:09:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:58,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:58,811 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:58,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750624115] [2022-02-23 18:09:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:58,820 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:58,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:09:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:09:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:58,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:58,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:58,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132861518] [2022-02-23 18:09:58,940 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:58,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750624115] [2022-02-23 18:09:58,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750624115] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:58,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:58,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:09:58,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941455433] [2022-02-23 18:09:58,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:58,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:09:58,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:09:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:09:58,942 INFO L87 Difference]: Start difference. First operand 173 states and 234 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:58,962 INFO L93 Difference]: Finished difference Result 173 states and 233 transitions. [2022-02-23 18:09:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:09:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-02-23 18:09:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:58,964 INFO L225 Difference]: With dead ends: 173 [2022-02-23 18:09:58,964 INFO L226 Difference]: Without dead ends: 173 [2022-02-23 18:09:58,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:09:58,965 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:58,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-23 18:09:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-02-23 18:09:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.330708661417323) internal successors, (169), 129 states have internal predecessors, (169), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 18:09:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2022-02-23 18:09:58,972 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 36 [2022-02-23 18:09:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:58,972 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2022-02-23 18:09:58,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:09:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2022-02-23 18:09:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 18:09:58,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:58,973 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:58,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 18:09:59,192 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-02-23 18:09:59,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:59,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971446301] [2022-02-23 18:09:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:59,203 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:59,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133474261] [2022-02-23 18:09:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:59,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:59,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:59,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:59,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:09:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:09:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 18:09:59,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:59,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:59,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971446301] [2022-02-23 18:09:59,338 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:59,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133474261] [2022-02-23 18:09:59,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133474261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:59,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:59,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:09:59,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885784081] [2022-02-23 18:09:59,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:59,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:59,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:59,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:59,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:09:59,339 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 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) [2022-02-23 18:09:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:59,376 INFO L93 Difference]: Finished difference Result 236 states and 329 transitions. [2022-02-23 18:09:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:09:59,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 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 39 [2022-02-23 18:09:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:59,378 INFO L225 Difference]: With dead ends: 236 [2022-02-23 18:09:59,378 INFO L226 Difference]: Without dead ends: 236 [2022-02-23 18:09:59,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:09:59,379 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:59,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-23 18:09:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2022-02-23 18:09:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 160 states have (on average 1.3625) internal successors, (218), 162 states have internal predecessors, (218), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 18:09:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2022-02-23 18:09:59,389 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 39 [2022-02-23 18:09:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:59,389 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2022-02-23 18:09:59,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 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) [2022-02-23 18:09:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2022-02-23 18:09:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 18:09:59,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:59,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:59,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:59,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 18:09:59,603 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-02-23 18:09:59,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:59,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954951839] [2022-02-23 18:09:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:59,614 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:59,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716882900] [2022-02-23 18:09:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:59,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:59,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:09:59,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 18:09:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-23 18:09:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:59,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:09:59,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:59,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954951839] [2022-02-23 18:09:59,996 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:59,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716882900] [2022-02-23 18:09:59,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716882900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:59,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:59,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 18:09:59,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139783727] [2022-02-23 18:09:59,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:59,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:09:59,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:09:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:59,998 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 18:10:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:00,733 INFO L93 Difference]: Finished difference Result 389 states and 574 transitions. [2022-02-23 18:10:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:10:00,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-02-23 18:10:00,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:00,735 INFO L225 Difference]: With dead ends: 389 [2022-02-23 18:10:00,735 INFO L226 Difference]: Without dead ends: 389 [2022-02-23 18:10:00,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:10:00,736 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 166 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:00,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 370 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 18:10:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-23 18:10:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 376. [2022-02-23 18:10:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 265 states have (on average 1.4226415094339622) internal successors, (377), 267 states have internal predecessors, (377), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2022-02-23 18:10:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 561 transitions. [2022-02-23 18:10:00,750 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 561 transitions. Word has length 41 [2022-02-23 18:10:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:00,750 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 561 transitions. [2022-02-23 18:10:00,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 18:10:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 561 transitions. [2022-02-23 18:10:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 18:10:00,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:00,751 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-02-23 18:10:00,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:00,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 18:10:00,967 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-02-23 18:10:00,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:00,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486604670] [2022-02-23 18:10:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:00,978 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:00,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21751278] [2022-02-23 18:10:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:00,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:00,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:00,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:01,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 18:10:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:10:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 18:10:01,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:01,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:01,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486604670] [2022-02-23 18:10:01,121 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:01,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21751278] [2022-02-23 18:10:01,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21751278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:01,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:01,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:01,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574839497] [2022-02-23 18:10:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:01,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:01,123 INFO L87 Difference]: Start difference. First operand 376 states and 561 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 18:10:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:01,160 INFO L93 Difference]: Finished difference Result 558 states and 875 transitions. [2022-02-23 18:10:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:10:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-02-23 18:10:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:01,163 INFO L225 Difference]: With dead ends: 558 [2022-02-23 18:10:01,163 INFO L226 Difference]: Without dead ends: 558 [2022-02-23 18:10:01,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:10:01,164 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:01,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-23 18:10:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 494. [2022-02-23 18:10:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 306 states have (on average 1.4248366013071896) internal successors, (436), 327 states have internal predecessors, (436), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 147 states have call predecessors, (167), 167 states have call successors, (167) [2022-02-23 18:10:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 772 transitions. [2022-02-23 18:10:01,184 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 772 transitions. Word has length 44 [2022-02-23 18:10:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:01,184 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 772 transitions. [2022-02-23 18:10:01,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 18:10:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 772 transitions. [2022-02-23 18:10:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:10:01,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:01,185 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:01,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:01,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 18:10:01,403 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-02-23 18:10:01,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:01,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137588842] [2022-02-23 18:10:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:01,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:01,413 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:01,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637507293] [2022-02-23 18:10:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:01,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:01,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:01,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:01,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 18:10:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:01,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 18:10:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 18:10:01,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 18:10:01,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:01,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137588842] [2022-02-23 18:10:01,646 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:01,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637507293] [2022-02-23 18:10:01,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637507293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:01,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:01,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-02-23 18:10:01,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561276354] [2022-02-23 18:10:01,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:01,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:10:01,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:10:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:10:01,651 INFO L87 Difference]: Start difference. First operand 494 states and 772 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 18:10:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:01,718 INFO L93 Difference]: Finished difference Result 502 states and 778 transitions. [2022-02-23 18:10:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:10:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-02-23 18:10:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:01,723 INFO L225 Difference]: With dead ends: 502 [2022-02-23 18:10:01,723 INFO L226 Difference]: Without dead ends: 502 [2022-02-23 18:10:01,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:10:01,724 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:01,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-02-23 18:10:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2022-02-23 18:10:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 310 states have (on average 1.4161290322580644) internal successors, (439), 330 states have internal predecessors, (439), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-02-23 18:10:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 775 transitions. [2022-02-23 18:10:01,747 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 775 transitions. Word has length 42 [2022-02-23 18:10:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:01,747 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 775 transitions. [2022-02-23 18:10:01,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 18:10:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 775 transitions. [2022-02-23 18:10:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:10:01,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:01,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:01,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-23 18:10:01,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 18:10:01,963 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2022-02-23 18:10:01,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:01,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835986674] [2022-02-23 18:10:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:01,972 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:01,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642097719] [2022-02-23 18:10:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:01,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:01,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:01,987 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:01,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 18:10:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:02,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:10:02,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:10:02,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:10:02,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:02,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835986674] [2022-02-23 18:10:02,252 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:02,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642097719] [2022-02-23 18:10:02,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642097719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:02,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:02,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-02-23 18:10:02,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692382849] [2022-02-23 18:10:02,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:02,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 18:10:02,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 18:10:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:10:02,254 INFO L87 Difference]: Start difference. First operand 498 states and 775 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:10:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:02,328 INFO L93 Difference]: Finished difference Result 504 states and 778 transitions. [2022-02-23 18:10:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:10:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-02-23 18:10:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:02,330 INFO L225 Difference]: With dead ends: 504 [2022-02-23 18:10:02,331 INFO L226 Difference]: Without dead ends: 504 [2022-02-23 18:10:02,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:10:02,331 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:02,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 214 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:10:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-02-23 18:10:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-02-23 18:10:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 314 states have (on average 1.4044585987261147) internal successors, (441), 334 states have internal predecessors, (441), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-02-23 18:10:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 777 transitions. [2022-02-23 18:10:02,350 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 777 transitions. Word has length 42 [2022-02-23 18:10:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:02,350 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 777 transitions. [2022-02-23 18:10:02,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:10:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 777 transitions. [2022-02-23 18:10:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 18:10:02,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:02,351 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:02,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:02,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:02,567 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:02,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:02,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2022-02-23 18:10:02,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:02,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986699105] [2022-02-23 18:10:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:02,576 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:02,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218237574] [2022-02-23 18:10:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:10:02,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:02,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:02,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 18:10:02,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:10:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:10:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 18:10:02,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:02,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:02,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986699105] [2022-02-23 18:10:02,692 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:02,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218237574] [2022-02-23 18:10:02,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218237574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:02,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:02,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:02,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975000198] [2022-02-23 18:10:02,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:02,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:02,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:02,694 INFO L87 Difference]: Start difference. First operand 502 states and 777 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:10:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:02,757 INFO L93 Difference]: Finished difference Result 760 states and 1199 transitions. [2022-02-23 18:10:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:10:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-02-23 18:10:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:02,762 INFO L225 Difference]: With dead ends: 760 [2022-02-23 18:10:02,762 INFO L226 Difference]: Without dead ends: 760 [2022-02-23 18:10:02,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:10:02,762 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:02,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 198 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-23 18:10:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 523. [2022-02-23 18:10:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 351 states have (on average 1.396011396011396) internal successors, (490), 369 states have internal predecessors, (490), 153 states have call successors, (153), 19 states have call predecessors, (153), 18 states have return successors, (151), 134 states have call predecessors, (151), 151 states have call successors, (151) [2022-02-23 18:10:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 794 transitions. [2022-02-23 18:10:02,786 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 794 transitions. Word has length 43 [2022-02-23 18:10:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:02,787 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 794 transitions. [2022-02-23 18:10:02,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 18:10:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 794 transitions. [2022-02-23 18:10:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 18:10:02,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:02,788 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:02,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:03,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 18:10:03,011 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-02-23 18:10:03,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:03,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323074020] [2022-02-23 18:10:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:03,020 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:03,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452275089] [2022-02-23 18:10:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:03,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:03,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:03,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 18:10:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:03,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-23 18:10:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 18:10:03,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 18:10:04,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323074020] [2022-02-23 18:10:04,459 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452275089] [2022-02-23 18:10:04,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452275089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:04,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:04,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-02-23 18:10:04,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165319055] [2022-02-23 18:10:04,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:04,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 18:10:04,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 18:10:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-23 18:10:04,461 INFO L87 Difference]: Start difference. First operand 523 states and 794 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-02-23 18:10:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:09,046 INFO L93 Difference]: Finished difference Result 836 states and 1287 transitions. [2022-02-23 18:10:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 18:10:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-02-23 18:10:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:09,050 INFO L225 Difference]: With dead ends: 836 [2022-02-23 18:10:09,050 INFO L226 Difference]: Without dead ends: 834 [2022-02-23 18:10:09,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-02-23 18:10:09,051 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 163 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:09,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 815 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-23 18:10:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-02-23 18:10:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 673. [2022-02-23 18:10:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 474 states have (on average 1.40084388185654) internal successors, (664), 486 states have internal predecessors, (664), 177 states have call successors, (177), 22 states have call predecessors, (177), 21 states have return successors, (175), 164 states have call predecessors, (175), 175 states have call successors, (175) [2022-02-23 18:10:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1016 transitions. [2022-02-23 18:10:09,075 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1016 transitions. Word has length 58 [2022-02-23 18:10:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:09,076 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1016 transitions. [2022-02-23 18:10:09,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-02-23 18:10:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1016 transitions. [2022-02-23 18:10:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-23 18:10:09,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:09,077 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:09,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:09,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 18:10:09,287 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2022-02-23 18:10:09,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:09,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672232425] [2022-02-23 18:10:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:09,296 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:09,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933206803] [2022-02-23 18:10:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:09,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:09,301 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:09,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 18:10:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 18:10:09,353 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 18:10:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 18:10:09,415 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 18:10:09,415 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 18:10:09,416 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 18:10:09,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:09,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 18:10:09,620 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:09,622 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 18:10:09,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:10:09 BasicIcfg [2022-02-23 18:10:09,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 18:10:09,660 INFO L158 Benchmark]: Toolchain (without parser) took 16802.60ms. Allocated memory was 179.3MB in the beginning and 227.5MB in the end (delta: 48.2MB). Free memory was 124.3MB in the beginning and 80.6MB in the end (delta: 43.7MB). Peak memory consumption was 93.3MB. Max. memory is 8.0GB. [2022-02-23 18:10:09,660 INFO L158 Benchmark]: CDTParser took 0.58ms. Allocated memory is still 179.3MB. Free memory is still 140.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 18:10:09,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.64ms. Allocated memory was 179.3MB in the beginning and 227.5MB in the end (delta: 48.2MB). Free memory was 124.0MB in the beginning and 198.3MB in the end (delta: -74.3MB). Peak memory consumption was 13.4MB. Max. memory is 8.0GB. [2022-02-23 18:10:09,660 INFO L158 Benchmark]: Boogie Preprocessor took 24.20ms. Allocated memory is still 227.5MB. Free memory was 198.3MB in the beginning and 196.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 18:10:09,661 INFO L158 Benchmark]: RCFGBuilder took 310.24ms. Allocated memory is still 227.5MB. Free memory was 196.8MB in the beginning and 185.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 18:10:09,661 INFO L158 Benchmark]: IcfgTransformer took 41.78ms. Allocated memory is still 227.5MB. Free memory was 185.2MB in the beginning and 183.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:10:09,661 INFO L158 Benchmark]: TraceAbstraction took 16195.17ms. Allocated memory is still 227.5MB. Free memory was 183.1MB in the beginning and 80.6MB in the end (delta: 102.5MB). Peak memory consumption was 103.6MB. Max. memory is 8.0GB. [2022-02-23 18:10:09,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58ms. Allocated memory is still 179.3MB. Free memory is still 140.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.64ms. Allocated memory was 179.3MB in the beginning and 227.5MB in the end (delta: 48.2MB). Free memory was 124.0MB in the beginning and 198.3MB in the end (delta: -74.3MB). Peak memory consumption was 13.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.20ms. Allocated memory is still 227.5MB. Free memory was 198.3MB in the beginning and 196.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 310.24ms. Allocated memory is still 227.5MB. Free memory was 196.8MB in the beginning and 185.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 41.78ms. Allocated memory is still 227.5MB. Free memory was 185.2MB in the beginning and 183.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 16195.17ms. Allocated memory is still 227.5MB. Free memory was 183.1MB in the beginning and 80.6MB in the end (delta: 102.5MB). Peak memory consumption was 103.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=10, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.1s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1000 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 943 mSDsluCounter, 4316 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3465 mSDsCounter, 556 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2475 IncrementalHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 556 mSolverCounterUnsat, 851 mSDtfsCounter, 2475 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 914 GetRequests, 747 SyntacticMatches, 7 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=673occurred in iteration=17, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 578 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 666 NumberOfCodeBlocks, 666 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 859 ConstructedInterpolants, 0 QuantifiedInterpolants, 3848 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2313 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 246/348 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-23 18:10:09,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...